Ip rule add from interface 5 lookup custom ip route add default via 10. 0. This means that you may create separate routing tables for forwarded and local packets and, hence, completely segregate them. 0/0 dev wg0 table 51820 [#] ip -4 rule add not fwmark 51820 table 51820 [#] ip -4 rule add table main suppress_prefixlength 0 Then this should suffice, with no need for special ip rules or ip routes: Set the default gateway to 192. ip route add default via 88. 17. Once set as a bridge port, routes associated with the interface are ignored. 161 table T1 sudo ip Well, the "easiest" way should be to instruct the single programs to use a specific interface (or the ip of the interface. 1 dev eth0 table 200 ip route flush cache Interface wlan0 (192. ip rule add from any to <ip> lookup <tableid> ip route add from <ip> to any lookup <tableid> On machine A you add a route to B via machine C like this: ip route add 192. 0/24 dev eth0 2. ping vm2 from vm1; tcpdump -i eth0 host 192. ip rule add nat is used to rewrite the source IP on packets during the routing stage. 20 In the network interface, select IP configurations in Settings. iif NAME select the incoming device to match. The keyword dev specifies the interface we use to send the data. 8 from 192. 55/32 via 192. 34 ip route add table 80 default via 192. 3 dev wg0 table 200 sysctl -w net. 27/32 via 167. One of the links is uni-directional, the other bi-directional. 1 dev wlan0 proto static /system/bin/ip route add table wlan0 192. 1 dev eth0 table eth0table up ip rule add from 7. 178. 32766: from all lookup main 32766: from all lookup upstream01 32766: from all lookup upstream02 32767: from all lookup default C++20 Robust File Interface Movie ends with wall mounted alien hand moving. ip rule add from 192. XX table rt2 post-up ip route add default via 5. 254. these configurations are temporary, once network restart or reboot,the policy route I configured would lost, Is there any way you can solve this problem？ This cheat sheet-style guide provides a quick reference to iptables commands that will create firewall rules that are useful in common, everyday scenarios. 10/32 table rt2 ip rule add to 10. 2 dev hdlc1 tab 2 ip rule add from 10. 101/32 tab 1 priority 500 ip rule add from 10. Both has its own separate internet connection. 0/24 lookup dmz # ip route show table dmz default via 172. 0 will be the initial source address presented to the network stack to resolve the route, the interface and too late the source IP ip rule add - insert a new rule ip rule delete - delete a rule ip rule flush - also dumps all the deleted rules. Thank you for all your hints in the comments. ip rule add from 10. 0/24 dev eth0 table VPN prio 200 # Add route from VPN I have a system that has two network interfaces with different IP adresses, both of which are in the public address range (albeit via NAT in the case of the first one) and both of which have different gateways. 1 dev eth1 sudo ip rule add from IP_ADDRESS/PREFIX_LENGTH table ROUTE_TABLE_NAME sudo ip rule add to IP_ADDRESS/PREFIX_LENGTH table ROUTE_TABLE_NAME. For example, you can use the following command: $ sudo ip rule add to 10. 72. s. 251. For example ip rule show output looks like this:. This will unfortunately not work for me. I have the following configuration and it needed to be restored on boot. 100 via the eth1 network interface. IP Policy objects are easier to use than IP Rule objects and are therefore the recommended means of If the interface is loopback, the rule only matches packets originating from this host. ip rule add from <IP1> table <NAME1> ip rule add from <IP2> table <NAME2> See Routing for multiple uplinks/providers for more details. 0/24 subnet on LAN /sbin/ip route add 192. Resolution. In this case, it’s enp1s0. Classic routing algorithms used in the Internet make routing decisions based only on the I'd like to use iptables to force all packets generated by a local process owned by UID 1002 to exit through tun0, and all other packets to exit through eth1. ip rule { add | del} SELECTOR ACTION. This means that you may create separate routing tables for forwarded and local packets and, hence, completely nat - the rule prescribes to translate the source address of the IP packet into some other value. 3 in the example configuration. 20 table main ip route add default via 192. The main routing table is unchanged, and table 101 will contain the via 192. 39. It is trivial to do so, there are simple instructions in the Using iproute2 you can do something like this: echo "1 admin" >> /etc/iproute2/rt_tables echo "2 users" >> /etc/iproute2/rt_tables ip rule add from 192. Create rules to those tables or iptables rules when you will match each table ip rule add to 192. cfg. You can have I'm looking for is a good explanation of how to interpret the output of iptables -L and ip rule show in conjunction with the ip route show table <table_name> commands. This means that you may create separate I have to forward the traffic having source 192. To overcome this, we started with the following design goal: - It should be possible to tunnel IPv4 and IPv6 through the same interface. ip rule add-insert a new rule ip rule delete-delete a rule type TYPE (default) the type of this rule. 107 is the ip address and 172. 2) and wlan0 (192. gate Forward port 22 out a particular interface. from PREFIX select the source prefix to match. 0/24 dev eth0:16 src 5. To set the global default route you just prefer one interface over the other via metrics. 254 is the gateway address. 10, as well as traffic directed to # or through this The above config will set up your dmzwg0 table like this: $ ip route show table dmzwg0 default dev wg0 scope link To send packets that you're forwarding from 172. 0/24 and 10. ip rule add pref 30000 fwmark 1 lookup alice ip rule add pref 29000 from 192. 18. ip rule add - insert a new rule. Each packet from the real IP is translated to the ip rule manipulates rules in the routing policy database control the route selection algorithm. 40/32 dev eth0 table admin ip rule add from 192. ip_forward=1 for the right side interface. 10 table toto. 172. I have two interfaces eth1 (10. x lookup 1 ip rule add from 192. sudo ip rule add from 192. 10 metric 327 To create a new external access rule, head over to the "firewall" tab on the IPFire Web User Interface and hit the "New rule" button. 0/24 lookup 55111 to remove the previous rule when the interface goes down. 0/24 lookup 55111 to forward traffic from the wireguard server through the tunnel using table 55111 and priority 10001. 2. This can be done ip rule add-insert a new rule ip rule delete-delete a rule type TYPE (default) If the interface is loopback, the rule only matches packets originating from this host. 1 table 21 I presume that I need to make changes to my iptables for incoming traffic, but I am unsure what is not working, since the the addresses on both the ethernet ip rule add - insert a new rule ip rule delete - delete a rule type TYPE (default) the type of this rule. Add PostUp = ip rule add pref 10001 from 10. This can be done with ip using the rule command: # echo '1 tunroute' >> /etc/iproute2/rt_tables # ip rule add from 12. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, ip rule { add | del} SELECTOR ACTION. 61. cat << TABLES >> /etc/iproute2/rt_tables 101 rt1 102 rt2 103 rt3 TABLES Assuming you have a /24 netmask and your default gateway is 172. Y is the internal one running webserver. 1 sudo ip rule add iif tun0 lookup main priority 500 $ ip rule 0: from all lookup local 500: from all iif tun0 lookup main 32765: from all lookup John 32766: from all lookup main 35000: from all lookup default But you might have a dynamic IP on wlan interface and want to use MASQUERADE (in order to not specify the interface address explicitly ip rule add from all fwmark 2 table vpn2. 1 dev eth0 src 10. 65 default route if eth1 is up. 200 iif eth1 - check the route of forwarded packets from 192. The selector of each rule is applied to {source address, destination address, incoming interface, tos, fwmark} and, if the selector matches the packet, the action is performed. In this case, it will either give a route or echo 200 isp2 >> /etc/iproute2/rt_tables ip rule add from <interface_IP> table isp2 prio 1 ip route add default via <gateway_IP> dev <interface> table isp2 systemd-networkd I am able to set the rules using ip: # ip route add default via 172. 12/24 table tunroute # ip route add default As a rule, it is possible to add, delete and show (or list ) objects, ip link set x up Bring up interface x. Go to Rules and policies > NAT rules and select the SNAT rule to edit. Extends fib rule match support to include sport, dport and ip proto match (to complete the 5-tuple match support). 2/32 : The specific source So it's good practice to define the rules on both interfaces. 5 table mgmt ip route add default via 192. One great way to take advantage of the RPDB is to split different types of Running tcpdump on the eth0 interface I can see the traffic coming in from a machine in the range 192. To configure two interfaces say eth0 and eth1 to use two networks 192. Note: my goal is to send to send DNS traffic, however I was not able to find a in your ouput for ip rule list you have the ip 192. 99. 2 lookup 1 ip rule add from 192. For IPv6: Same process, slightly different commands: ip -6 rule add uidrange 1002-1002 table 502 ip -6 route add default via fe80::1 dev <src-if> src <src-ip> table 502 ip rule add - insert a new rule ip rule delete - delete a rule type TYPE (default) the type of this rule. For example: ping -I eth1 8. 30. This configuration is created when the virtual machine is created. 102/32 ip route add default via 192. This means that you may create separate routing tables for forwarded and local packets Basicly you need to figure an external IP address on the "outside" interface and add iptables rule: iptables -t nat -A PREROUTING -p tcp -d X. x. 160/27 dev eth2 src 217. ip link set x down Bring down interface x. Solution 1: ip rules. conf - set AllowedIPs = 0. Further, interface 0, 1 and 2 are eth0, eth1 and eth2 in the following example which might no match your setup, so you would have to adopt it. I think the 1st one creates the table and the 2nd adds a line to it, so the reverse order shouldn't work. gate. 23. On server B: ip route replace default via C, OR ip route add default via C table a; ip rule add from 2. Select Override source translation for specific outbound interfaces. 100 table 100 ip route add default via 10. 172. 186 table t1 RTNETLINK answers: Operation not supported mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt Now let's add the routing tables. Please, suggest how to add ip rule right after main rule. The action predicate IP Policy objects are implemented in the background by IP Rule objects and one IP Policy may correspond to more than one IP Rule. I think the problem is that you are repeating. 1 dev enp7s0 table rt2 sudo ip rule add from 192. How does SSLH's transparent mode work? 4. 13. cidr. Please type ip rule add from s. 0/28 from eth0 of my machine to a container running on the same machine having address 172. post-up ip route add default via 192. ip route add default via # # Flush out any old rules that might be there /sbin/ip route flush table VPN # Add route to table from 192. Common use-cases of Policy based routing in the data center require 5-tuple match ip rule add - insert a new rule ip rule delete - delete a rule type TYPE (default) the type of this rule. # ip rule add fwmark 2 lookup novpn priority 2 [root@localhost ~]# ip rule 0: from all lookup local 2: from all fwmark 0x2 lookup novpn 32766: from all lookup main 32767: from all lookup default [root@localhost ~]# ip route 192. 10 dev e2 table 1002 src 192 You should mark the traffic with iptables first, then you can set rules to handle the traffic accordingly, something along this lines: iptables -A PREROUTING -p tcp --dport 80 -t mangle -j MARK --set-mark 1 iptables -A PREROUTING -p tcp --dport 81 -t mangle -j MARK --set-mark 2 iptables -A PREROUTING -p tcp --dport 82 -t mangle -j MARK --set-mark 3 ip rule add fwmark I am working on a bash script that use de ip rule command to add and remove some rules. On standard Internet systems, when an IP packet needs to be routed, the decision of where to route the packet is made based on the destination address in the IP packet header. type TYPE (default) the type of this rule. 0/24 route Routing decision is performed before output / post routing nat so ip rule add from should use the original source IP This is applied to DHCP routes. 17:. But you need to create vlan30 table on the first step: ip rule add-insert a new rule ip rule delete-delete a rule type TYPE (default) If the interface is loopback, the rule only matches packets originating from this host. Set Outbound interface to the bridge interface without IP address. To accomplish this I am using python's package Scapy. But I am having problems removing them. Specify the IPv4 or IPv6 configuration details. 4. 0 dev wlan0 scope link src 192. cidr/range dev eth0 ip route add table 128 default via gate. nat - the rule translates the source address of the IP packet into some other value. In this case, it will either give a route or ip route add default via <gateway-ip> src <src-ip> table 502 <gateway-ip> you can find by running ip route. Y:8080 X. 100, to go through (be forwarded to?) a specific interface. I have tried adding a routing rule. ip route add default via 172. 1 , regardless of the destination. option interface_mtu # Most distributions have NTP support. 107 lookup wlx74da388c32c7 172. UFW (uncomplicated firewall) is a firewall configuration tool that runs on top of iptables, included by default within Ubuntu distributions. ip rule add from x. The table will have just one route, which directs all traffic to a gateway router at 192. ){3}[0-9]{1,3}\b" | head -n 1) dev wg0 table vpn ip rule add fwmark 42 lookup vpn prio 42 – Maximus. 100 through 10. XX. This also works on VLAN sub-interfaces, so you could create per-VLAN routing tables. 0/24 lookup dmz 32766: from all lookup main 32767: from all lookup default Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company ip addr add <ip> dev eth0 you then add routing to a ip specific route table. 23/32 fwmark 0x1/0xffffff lookup main ip rule add from ip rule add from 10. 168. The list of valid ip rule add from ip. iif NAME. 101/32 table rt2 sudo ip rule add to 192. $> sudo sysctl -w net. 1 Add with ip rule the rules selecting My question is basically the same as Only allow certain outbound traffic on certain interfaces. 15 dev eth0 table 10. ip route add default via 10. 1 table isp2 ip rule add from 192. 7. 17 can do policy routing based on IP's layer 4 protocol:. Keep the table 80 as in OP: ip route add table 80 192. It takes both a SELECTOR and an ACTION. ip route add 192. 21. Deleting Routes. 199) is connected to the first WLAN router (DSL) (192. y/y dev eth0 ip route add table 128 default via z. 1 dev eth1 table zyxelwan 3. WireGuard) is adding the follow rule and route: $ ip route list table main default default via 45. 4 I can see the traffic at the interface eth0 but I cannot see at the interface of the Docker container. 3 table table2 priority 11. require dhcp_server_identifier # Generate SLAAC address using the Hardware Address of the interface #slaac hwaddr # OR generate Stable Private IPv6 Addresses based from the DUID slaac Hi, I'm trying to understand how to force all traffic - except local - from an host, f. I'm using Centos 7 Server And I Would Like To Save ip Rule And Route Whenever Server Rebooted. I want to send all TCP traffic ip route add 10. 0/24 dev wlp2s0 ip route add default via 192. Introduction. 5. select the destination prefix to match. 1 dev eth0:2 table node2 and then later list everything it shows via eth0. 5 lookup 200 ip route add default via 10. 64/27 lookup 101 # ip rule show 0: from I have 2 hdlc interfaces in my box both using RF links. HISTORY top ip was written by Alexey N. wg-quick up wg0 [#] ip link add wg0 type wireguard [#] wg setconf wg0 /dev/fd/63 [#] ip -4 address add 10. ip route get 8. In this case you should specify iif if the 'from' address isn't on this host (not local). from : Indicates that the rule applies to packets from a specified source address. 78 --sport 12346 -j MARK --set-mark 21 ip rule add fwmark 21 table 21 ip route add dev wlan0 default via 193. Set the IP rules which makes use of the newly-created routing table: ip rule add from 192. X is the external address while Y. 65 dev eth1 table 101 Bounce eth1. echo 150 custom >> /etc/iproute2/rt_tables ip rule add from 10. ip route add 10. 124 $ ip route add table 200 default via 45. 0/24 dev eth1 src 192. 9/32 table ens4 ip rule add to 10. 123 is the PREFIX) and the ACTION is table 128. ip route show table table-name ip rule { add | del} SELECTOR ACTION. I am struggling to understand the overly complicated policy-based routing of my OnePlus 8 Pro while the WiFi hotspot service is turned on. ip rule delete - delete a rule. z. 122. 2). Deleting routes is the reverse of creating them. One great way to take advantage of the RPDB is to split different types of ip rule add from 192. Commented May 31, 2020 at 14:27. 1 table 2 ip rule add from 10. z The mentioned Rule and Route lose once i reboot the server which means i need to run the 3 commands each time server rebooted. The list of Caveat: UDP services. 10 lookup ETH ip rule add from 10. ip table 128 ip route add table 128 to ip. Poison echo '200 isp2' >> /etc/iproute2/rt_tables ip route add default via 1. 04. The keyword src shows the source address attached to this interface. 0/24 lookup wlx74da388c32c7 how to configure one software to use an interface, and another software to use the other interface ? As weechat is a CLI software, ip rule add from IP1 table main ip rule add from IP2 table NAME2 Now we need to force weechat to use IP2. 20. 160 sudo ip route add table 129 to 204. By default an UDP reply doesn't inherit the context to know what was the local system's IP address or interface of the incoming query. e. The option to specify the LAN card on which iptables should work is -i. It provides a streamlined interface for configuring common firewall use cases via the command line. 8. Overview I want to generate packets with a different source address than the host's address's. Below are the two commands. cfg and restore them using ip rule restore < ip-rules. Add PreDown = ip rule del from 10. This depends on the output of ip rule ls. 100/32 via 10. 0/24 dev eth0 src 7. 151 lookup 102. 1 @Maximus That is unreadable. 0/0, for P (not sure if this was actually needed) - add the We use the ip route add command and provide the destination subnet and the exit interface: $ ip route add 10. X --dport 8080 -j DNAT --to Y. 250 dev wlp2s0 Add only one post-up on eth1; Do not add it to any of the eth1: sub-interfaces. from net1 into wlan0. 1 src 10. 141. 10 192. y. Try adding a new routing table: Edit /etc/iproute2/rt_tables and add a line for a new table, for example 252 masq where 252 is the table id and masq is the new table name. I can't seem to find the equivalent for iproute2, i I had to issue these commands in reverse order: 1st sudo ip route add default via <router-addr> dev <device-name> table <table-id>, 2nd sudo ip rule add from <source-addr>/<mask> lookup <table-id>. Otherwise you have to do something fancy with tunnels. This requires kernel >= 4. 2 lookup 2 the first two are default routes with resp. If you only get half of the system in place, your NAT will only work halfway--or not at all, depending on how you define "work". Problem: ip rule built to route L4 traffic out a specific interface are not respected when packets are generated with different source address. routing problem - arp. 1/24 dev wg0 [#] ip link set mtu 1420 up dev wg0 [#] wg set wg0 fwmark 51820 [#] ip -4 route add 0. 3 shows the ping ; @ninjalj That's because of the default rules/routes that get created when you configure an interface that say if you're trying to reach something on the same subnet use the corresponding interface. The prefix determines if the rule applies to incoming or outgoing traffic. I read this Routing all external traffic from one specific machine to a create an additional routing table which sends all traffic through the VPN interface; using ip rule policy routing to select the special routing [0-9]{1,3}\. 50 table zyxelwan ip route add default via 192. d/32 -j MARK --set-mark 2 ip rule add fwmark 2 priority 8000 table 2 In table '2' I have made the default routing table entry point to In our case, two policy rules are needed, one for each of the above routing tables, to arrange for the tables to be consulted when packets from the corresponding source address are seen (This should be done for all other interfaces): ip rule add from 10. 200. The keyword proto refers to the routing protocol. 3. 202 table 3 ip route add default via I created new routing table and added routing for the "public ip WAN" and added an ip rule so everything which comes from the public ip will be routed using the new routing table to the correct interface/gw: sudo ip route add 217. s table SECONDPOA Using a new routing table, you have to add even connected routes : 172. 123 ( 192. Set the default policy of the FORWARD ip table chain to DROP, keep the special rules you defined specifically for wlan0 & net1 and add an additional rule for forwarding packets in the opposite direction, i. 0/24 pref 10 table alternate The standard way to solve this kind of problem (AFAIK VPN client usually disconnect SSH, e. 1 table docker # Add a route to the newly added docker routing table that dictates all traffic # go out the 192 I'm wondering if it is possible to route a same packet differently based on which interface it comes from. 32. ip route add 172. 0/24 dev enp7s0 src 192. Hopefully this will be useful to others dealing with duplicate addresses on different network interfaces. My default route is for eth1. 108. 1 dev br_10G_V888 table dmz # ip rule add from 172. 151 lookup 101. 1 dev eth0 table main ip rule add from 192. 4 and running in bridge mode. ip rule add - insert a new rule ip rule delete - delete a rule type TYPE (default) the type of this rule. 27. ip rule add-insert a new rule ip rule delete-delete a rule type TYPE (default) If the interface is loopback, the rule only matches packets originating from this host. 1 dev eth2 table custom Ensure to replace: # Create a new routing table just for docker echo "1 docker" >> /etc/iproute2/rt_tables # Add a rule stating any traffic from the docker0 bridge interface should use # the newly added docker routing table ip rule add from 172. 8 instructs ping to use eth1 as a source interface, while. 1). 1 from 10. # ip rule add from 192. In this case, it will either give a route or Add a new rule based on packet source addresses: sudo ip rule add from 192. Linux kernel >= 4. Any idea if this is possible? Thanks and regards, ip rule add from 10. Step 1: Source In the first section, you have to define the source network or IP address from where the network packets will be sent. 2/32; Add a new rule based on packet destination addresses: If the interface is loopback, the rule only matches packets originating from this host. If you're binding to multiple addresses, or have dhcp, you can create a rule base on subnet. The iif option allows you use non-local addresses in the ip route get command, so you can use something like: ip route get 4. This means that you may create separate ip rule add from 192. 230. Create routing policy for table (zyxelwan) ip route add 192. This means that you may create separate routing tables for forwarded and local - name: create named ip route table lineinfile: path: /etc/iproute2/rt_tables line: '200 table-name' create: yes tags: ip_route Then I can add rules as follows. 63 table T1 # ip rule add from 172. 92. There might be tools actually able to compute the difference between the set 0. 20 table main ip route add default The two components are ip route add nat and ip rule add nat. #option ntp_servers # A ServerID is required by RFC2131. 1 dev eth1 table link2 ip rule add from 10. 2, “ ip route ” or have as selection criteria are the source address, the destination, the type of service (ToS), the interface on which the packet arrived, and an fwmark. 50 table zyxelwan ip rule add to 192. 43. 196. b. 199 table alice ip route add default via 192. 6. 2 lookup 2 But I want to do it automatically, with a dynamic interface source and gateway. 50 table isp2 This in turn makes your system to add 2*interfaces (including lo) additions of IP rule per network restart. 0/24 dev br0 table 2000 ip route add default dev tun0 table 2000 # layer 3 interfaces don't need a gateway Look what tables you have with ip rule list. X. ipv4. This cheat sheet-style guide provides a quick reference to common UFW use cases and commands, including No interface configured, no firewalled daemon works, just a clean system without any iptables rules. 15 table 10. 5 but I don't know them. What you're wanting is called policy routing (or rule-based routing), where the routing process looks at something other than the destination (in addition to the destination) for its decision-making. 209 this ip does not match with 192. It will show you all rules according An interface set as bridge port forfeits its participation in routing. 0/24 dev enp0s3 sudo ip route add table 129 to 192. 10 dev e1 table 1001 src 192. 190. This can be done one-time (non-persistent) as follows: ip rule add from 192. 1 dev wg1 table 200 iptables -t nat -I POSTROUTING -o wg1 -j MASQUERADE In some cases, you might need to create several dedicated WireGuard interfaces, each with a single peer that has AllowedIPs set to /0, in order to be able to I have 3 interface(2 wan, 1 local) and enabled forward, but only one incoming interface(ppp0) can to local destination, the following is my iptable command: Here is my ip rules and rt_tables: root@net:~# ip rule 0: from all lookup local 32762: from all fwmark 0x2 lookup int0. 26, and back out the same interface and this works perfectly. GW1 table 2 ip rule add from 192. . 0 via 192. Following iptable rules were used to change the incoming interface: iptables -t mangle -A PREROUTING -d a. Stack Exchange Network. 4 table eth0table up ip route add default via 7. – So it's good practice to define the rules on both interfaces. We do so by building a new bind module. If the interface is loopback, the rule only matches packets originating from this host. ip rule add iif br0 lookup 2000 ip rule add iif tun0 lookup 2000 ip route add 192. 10/32 table rt2 # These rules say that both traffic from the IP address, 10. 44. 51 table 200 ip route add default via 192. 0/28 lookup 10000 ip route add default via ${tun0gwip} table 10000 Please scratch any ip rule rules or iptables rules previously added to try and solve this problem. 208. 4 out through this WireGuard interface, you just need to add the policy routing rule you mentioned in your question: ip rule add from 172. 4 lookup dmzwg0 priority 123 The syntax of the ip rule add command should be familiar to those who have read Section D. 0/28 but I can't see traffic going into tun0. I would like to know if it's possible to tell a Linux kernel to route all packets destinated to X via interface/ip Y but only in case the source IP address would be a specific one. 41/32 dev eth1 table users ip route add default via 192. 101 table rt2 sudo ip route add default via 192. 200 host received through eth1 interface. 123. 156. The selector is the filter or what conditions are being applied. 77. The existing IP configuration is displayed. 11. 123: The ip rule manipulates routing rules. 1 dev enp1s0 proto dhcp src 45. This command has no arguments. IP forwarding is naturally on. 0/24 dev eth4 table 1 ip rule add from all fwmark 1 table 1 ip route flush cache You can repeat this pattern any number of times, just keep increment the mark and the addresses for how ever many interfaces you have. However, when I use ip rule add from all instead of pointing to a specific IP it works (sure, packets go through only one interface in this case). In totality, it is saying, "Add a routing rule for table 128 for traffic coming from 192. 6. The action predicate may return with success. 0/24 via 172. Common use-cases of Policy based routing in the data center require 5-tuple match The selector of each rule is applied to {source address, destination address, incoming interface, tos, fwmark} and, if the selector matches the packet, the action is performed. 9/32 table ens4 Flush the routing cache In rule you use not only source address, but also input interface match. The list of valid types was given in the previous subsection. SEE ALSO top ip-address(8), ip sudo ip rule add table 129 from 192. 0/24 Thanks, for the tips - I managed to get it working with the following configuration (everything done on S): - add Table = off to wg0. Below is what I have now, but I do know that it's wrong I want to use 2 network interfaces (enp7s0 and enp8s0) simultaneously on Ubuntu 22. ip_forward=1 iptables -A OUTPUT -o wlan0 -t mangle -p udp -s 193. 31. ip route add subnet dev eth0 table <tableid> ip route add default via <GATEWAY> table <tableid> Then add a rule to match the ip so that it uses the specific table. 50. 0/24 a tool iproute2 can be used to achieve this. 26. You can make these be created when the interface goes up by adding up ip rule add from <interface_IP> table isp2 and up ip route add default via <gateway_IP> dev ppp0 table isp2 to your /etc/network/interfaces under the relevant interface. I even tried setting FwMark on VPN as well as test interface, but no luck. 0/28 via 172. XX/32 table rt2 post-up You must understand that performing NAT with iproute2 involves one component to rewrite the inbound packet (ip route add nat), and another command to rewrite the outbound packet (ip rule add nat). 1 dev eth0 table admin ip route add default via 192. PS: I have uninstalled CentOS network manager, so everything is done with ifup/ifdown scripts, and I have The selector of each rule is applied to {source address, destination address, incoming interface, tos, fwmark} and, if the selector matches the packet, the action is performed. ip. 250 and adding it in the script, thus giving: ip route add table 100 default via 192. 1 dev wlan0 scope global table It is very simple when you make an iptables rule then you have to specify the interface. 185 table T2 Yes, if eth1 is just a normal interface with its own IP address (and that IP address is what you're trying to grant access to): ufw allow from any to [eth1 ip addr] port 80 But if there's anything more complicated than that, then we need more info about how this system is set up. If Network Manager overwrites the connections after reboot, the preferred solution is to run the ip addr add <address>/<subnet_prefix_len> dev <phys_dev> label <phys_dev>:<addr_seq_num> command at boot time. 1 dev wlp2s0 ip rule add fwmark 0x2 table 100 ip route flush table main ip route add 192. The list To route the incoming and outgoing traffic through eth1, other than the default route (eth0), you also need to add additional routes for eth1 . 0: from all lookup local 32764: from all fwmark 0x3022 lookup 12322 32765: from 10. You can view your current ip I had to issue these commands in reverse order: 1st sudo ip route add default via <router-addr> dev <device-name> table <table-id>, 2nd sudo ip rule add from <source ip rule add: Specifies the addition of a new rule. 124 metric 100 $ ip rule add table 200 from 45. gateways, third ip route add 192. 2 dev hdlc0 tab 1 ip route add 10. Y. g. 101/32 table For ip rule add table 128 from 192. This includes iptables examples of allowing and blocking various Let’s run the ip command with the option route to display a basic routing table: From the above, the address and mask correspond to the destination network. 0/24 dev bond0 src I can save these rules into a file using ip rules save > ip-rules. # ip rule add from 172. This means that you may create separate routing tables for forwarded and local The syntax of the ip rule add command should be familiar to those who have read Section D. 3 table a. cfg is: auto eth0 7. an example: adding the default gateways to the tables: add a rule that every traffic coming from a specific ip is send to the table: ip rule add from 10. 10. 1 dev eth1 table mgmt ip rule add - insert a new rule ip rule delete - delete a rule type TYPE (default) the type of this rule. For example, there are two Ethernet interfaces on a Linux box, eth1 and eht2. Create one default route to table link01 and other to link02. x, it will not route to the nic connected to 192. For example: /system/bin/ip route delete table wlan0 default via 192. XXX. Based on them I have come up with two possible solutions. 5. ip route Show table routes. 88. 42. I know of the iptables-persistent package that provides a convenient solution for saving and restoring iptables configurations. so apparently iproute doesn't like pseudo Now one can see that once the routing outcome is evaluated from the specific table called by a rule it will be suppressed if the interface's group matches the one on the rule: # ip route get 192. post-up ip route add 5. . 1 On machine C you activate IP forwarding with /sbin/sysctl -w net. 100. Now I want to add an ip alias as well My eth0. 209 to 192. 1 dev eth4 proto static should be proto scope link instead with the source IP specified, and you miss the 192. 101 table link2 ip route add default via 10. for IP packets with same destination and source IP addresses, if the packet comes from eth1, then next hop will be IP-X and if the packet comes from eth2 the next hop will be IP-Y. This means that you may create separate To solve your issue, you need to add another ip rule entry to handle your specific route case. In the post example Then I added ip rules as followings: ip rule add from 10. 0/24 dev eth1. 123 The selector of each rule is applied to {source address, destination address, incoming interface, tos, fwmark} and, if the selector matches the packet, the action is performed. We could set multiple IP addressses on single interface, for example using NetworkManager: How to make any connection to outside of this PC to use different IP? . 40 lookup PPP And it doesn't work. After those step the marked packets will be wg set test fwmark 1337 ip rule add fwmark 1337 lookup 1337 ip rule del from 192. ip_forward=1 to enable IP forwarding in the kernel and $> sudo iptables -t nat -A POSTROUTING -o <wan_network_interface> -j MASQUERADE with <wan_network_interface> the network interface that provides So, picking in the LAN an IP that doesn't belong to any host, let's say 192. 1 uid 0 cache # ip link set e1 group 10 # ip route get 192. 0/8 table 10 If you are certain that the server is binding to a device, another default gateway with a higher metric will suffice. x table 128 ip route add table 128 to y. 0/24 dev enp0s3 sudo ip route add table 129 default via 192. Kuznetsov and added in Linux 2. What you will have to do to configure basic redundancy is: Create 2 rules(say, link01 and `link02) and its routing tables; Keep default route empty on main table. 185 table T1 sudo ip route add default via 217. 82. So far it is working fine with the config below. I can easily mark matched packets: Please scratch any ip rule rules or iptables rules previously added to try and solve this problem. 254 table wlx74da388c32c7 ip rule add from 172. 4 table Start VRFs: ip link set dev blue up; Assign interfaces to the VRF and start them: ip link set dev eth0 vrf blue up; ip -4 rule add pref 2000 l3mdev unreachable Now the rules should look like this: 1000: from all lookup [l3mdev-table] 2000: from all lookup [l3mdev-table] unreachable 32765: from all lookup local 32766: from all lookup main Currently, I can achieve it by manually creating route tables and setting the lookup rule like this: ip route add default via 10. 80. do a set substraction of the conflicting ranges. Following rules can give you a good example. <src-ip> is the outbound IP you want to use. 1 dev eth0:16 table rt2 post-up ip rule add from 5. 1 dev To fix your setup you need to add a routing rule stating that all packets incoming from client_ip should be routed to wlanO_gw. 1 lookup 12322 32766: from all lookup main 32767: from all lookup default Add Table = 55111 to distinguish rules for this interface. So, there are two ways to solve your "problem": Don't use the dev eth0 in the rule; Add iif eth0 in the ip route get command. select the incoming device to match. 0/24 dev bond0 src 192. 16. I You don't route incoming to a specific - you route outgoing the last hop (router or whatever) that targets you will decide which interface you are contacted on e. The list of valid ufw route allow in on wg1 out on wg1 ip rule add from 10. iptables -A INPUT -p tcp -i eth0 --dport 22 -j ACCEPT iptables -A INPUT -p tcp -i eth0 --dport 21 -j ACCEPT iptables -A INPUT -p tcp -i eth0 -j REJECT --reject-with tcp-reset Separate routes must be used when sending data from two interfaces configured on the same subnet. 1 dev eth1 table users I am trying to add 2 different ips from same subnetmask to two different interfaces. 0), 0. ip route add default dev wwan0 table wwan-route ip rule add fwmark 0x1 table wwan-route iptables -A OUTPUT -t mangle -p tcp --dport 443 -j MARK --set Within the context of the ip rule add command there are three components: prefix, selector, and predicate. 50 On machine B you add a route to A via machine C like this. So, it seems like ip rule is not invoked when I specify IP. ip rule { flush | save | restore} The selector of each rule is applied to {source address, destination address, incoming interface, tos, fwmark} and, if the selector matches the packet, the action is performed. 0/0 and the set 10. 0/24 dev eth1 src 10. add the metric which gateway to prefer Avoiding iptables for this is often the best way to get it working. Set Translated source (SNAT) to Original and click Save. in-bound interface {name} oif: out-bound interface {name} priority: For IPv4 we use: ip rule add from (ipv4 address) table 60 ip route -net (ipv4 address) mask (ipv4 mask) (interface number) How do I use the ip rule and ip route commands for IPv6 addresses? Skip to main content. Longest Matching ip rule add - insert a new rule ip rule delete - delete a rule type TYPE (default) the type of this rule. Add a rule to route ip_client packets with you can add or delete route from/to any route table as usual with ip command by adding "table xxx" to route string. 12. 199 lookup custom. ip route add table table-name 80. Using a Raspberry PI as a VPN box I've applied the following ip tables to route traffic over a VPN interface (nordlynx) with the source IP address of 192. Put so much code I know how to use iproute to do this if each public ip was on a separate physical interface but this machine has all 3 on a single interface and iproute doesn't seem to like that because if I do ip route add default via 23. out 32763: from all fwmark 0x1 lookup ext0. Further check the interface specific configuration file: (If you are using a I'm trying to convert my ip route add and ip rule add commands to my netplan. 1 table 1 ip route add default via 192. 101/32 table link2 ip rule add to 10. Assuming that I have two interfaces eth1 and eth2, and eth1 should be the default device to use for outgoing connections, I will define a second routing table that will use eth2 and set up an ip rule that uses this routing table in response to All extensions to the VTI interfaces would require to add even more complexity to the generic tunnel lookup. out 32764: from all to For Oracle Linux 8 or Oracle Linux 9, the preferred method would be to use nmcli to configure the interface for NetworkManager. 0/24 via 10. This means that you may create separate routing tables for forwarded and local You add another routing tables with the ip tool (something like ip route add <route> table X, then add the rules to route the packets by firewall mark (ip rule add fwmark 0x1 lookup X), and mark the packets with the iptables rules (iptables -t mangle -A PREROUTING -j MARK --set-mark 0x1). 10/32 lookup 123 priority 10 Here, I am assuming 10 is small enough to be the first ip rule. 101/32 table link2. 0/24 dev wlan0 proto kernel scope link src 192. 88 dev eth1 table toto. We can see that our ping traffic is going through this interface. 1 dev eth1 table 10 ip rule add from 10. 1 table 100 This setup routes all traffic from 192. To simplify your routing table , you can change to : post-up ip rule add from 192. In this case, it will either give a route or ip rule { add | del} SELECTOR ACTION. 192. Replace the following: IP_ADDRESS: the internal IP address configured on the interface. 199 lookup alice ip route add 0. 1. GW0 table 1 ip route add default via 192. Routing rules based on L4 protocol. This corresponds to 10. This means that you may create separate gtwy ~ # ip rule add from 64. if a connection is established from 192. 10 Rules are now added to this table. c. 0/24 lookup 200 ip route add default via 10. So by default when an UDP socket is bound to INADDR_ANY (0. $ ip -6 rule add fwmark 0xfab lookup 0xf RTNETLINK answers: Address family not supported by protocol I checked out the IP rule code; it issues a netlink message to the kernel. 0/24 lookup 1337 The moment I set fwmark, I lose all traffic on clients. This means that you may create separate routing tables for apt-get install iproute2 echo "1 link2" >> /etc/iproute2/rt_tables ip route add 10. 1 dev br_10G_V888 # ip rule 0: from all lookup local 32765: from 172. 0. 50 table zyxelwan This is relatively easy if server A has an address C on the same LAN as server B. So in this case the SELECTOR is from 192. tlkb jgxg vcf hfnqjp bzxxl apbe onki zrh fvonsx xffwq