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Questions tagged [ip-routing]

281 questions
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Routed IPv6 on internal bridge with virtualized OPNsense router

I'm struggling with adding IPv6 to the internal bridge of my setup, here is what I have: ┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────┐ │ …
Andreas Piening
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Routing traffic from a bridge to a specific interface

Fundamental question about routing in Ubuntu 20.04. I have a baremetal setup in Hetzner which has an 11.22.33.44/32 IPV4 address along with 2a01:db8:30/64 subnet allocated to it. enp7s0 is the physical interface which has 11.22.33.44/32 address. I…
ab_tech_sp
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Firewall / Ip rule issues between two hosts via vSwitch

I have two servers in play here, one is a Qemu VM host, the other being a storage box of sorts. They are hetzner machines, and I have them connected via a vSwitch. Server1 vSwitch interface: 3: local@eth0: mtu 1500…
omeganebula
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How to setup load balanced / fail-over route where there are multiple valid routes to the same subnet?

We have a situation where we have multiple EC2 instances each running a VPN. Both the remote VPN server and remote subnet are run by a third-party and we have no say in the way they are setup. We don't believe these are transferable to AWS client…
Philip Couling
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Routing issue between linux machine

Hi I have 3 linux servers deployed on Openstack cloud on same network. Server A -----> Server B ------> Server C Each server private IP address range is 192.168.10.x/24. All 3 servers are communicating to each other on 192.168.10.x IP range. I…
Rohit Singh
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Routing between two Cisco CSR1000v instances on AWS

I'm building a lab in AWS with Cisco CSR1000v virtual routers. I've tried both the below options. In option 1, there's no way to force the traffic from linux1 or 2 to the respective CSR routers since it's all in the same VPC, so it didn't work. I…
kaziman
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How to add a routing rule that only match "dport"?

In my OpenWrt box, I want to route only a specific protocol(tcp:1888) to a tun interface only for one PC(192.168.28.2), so I do as following: ip rule add from 192.168.28.2 dport 1888 lookup 123 ip route add default via 10.8.0.2 dev tun0 table…
Leon
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route packets from specific hosts to virtual device

PIMv2 I think the issue is with multicast. I want to create a GRE tunnel that supports multicast PIMv2. I am seeing the server sending PIMv2 Hello messages to my gre tunnel but my machine is not responding. ip tunnel add [g0] mode gre remote [remote…
neoh
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Decoupling IP address from hosting provider

We run a service that provides on demand websites to our users as part of our offering. In order for our users to use their own domain with our website feature, we have them create an A record to our server's IP address on their domain…
Eran Galperin
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Super user limited to changing route table

Background: I am trying to implement dynamic routing for a system. Is it possible to create a super user that is restricted to changing the routing table? Something like a restricted sudo that can only run route or ip route? I don't know exactly…
user27221
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DHCPOFFER not crossing virtual bridge on Linux?

I have a physical host machine running Ubuntu 20.4LTS (fully patched) attached to my network, which retrieves it's IP address via DHCP. This works. I have a VirtualBox VM on that host attached to a bridged interface (macvlan on the physical NIC)…
RabidMutant
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IP forwarding with iptables

Im new with this scope. I need your help for this setup. I have 3 linux systems that may seems look like this. System A System B System C ---------- ----> ---------- ----> ---------- VPN …
Dhody Rahmad Hidayat
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Linux router over VPN

I have a Linux (Ubuntu 18.04) device with 4 Ethernet ports and a LTE wwan card that I want to turn into a bridge and router. However, I don't want to enable NAT via the LTE connection, but route all devices connected to the ethernet ports over the…
Gavin Hill
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Can't get linux router/iptables masquerade working

Hope someone more clever than me could help because I am out of ideas... We want to create (in openstack) a router that will...route (haha) trafic from one network to the other. Simple. This is what I have done so far. I have read a lot of post and…
Romain Pelissier
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How to push a gateway and route to an OpenVPN client?

I need to setup a OpenVPN network which will probably grow to a serval hundreds of clients in the next few months. Some of the clients are servers and others are devices that need services, hosted on the server(s). The idea is to use a 10.10.0.0/16…
CodeNinja
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