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Questions tagged [ip-routing]

272 questions
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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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Static route between 2 routers

Hello I have problem with static routing between 2 simple (Zyxel and TPLink) routers. vDSL Router 1 has 192.168.0.1/25 with enabled DHCP and Router 2 has 10.0.0.1/25 also with DHCP Router 1 and Router 2 are connected with cat5e. From ethernet port 3…
Adam Kenny Šmíd
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Routing in linux with two nics

I've been squeezing my mind with this problem since a couple of days, unfortunately I can 't find a way out. May be it's lack of theory or just a bad setup. I will appreciate a bit of help :-) schematic diagram I 'm having a problem to achieve this…
tangerine3031
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VM client doesn't route packages correctly anymore (to specific networks)

I have kind of a strange problem. After rebooting a server a few days ago, it doesn't route its packages correctly. It basically doesn't answer (pings for example) if these packages come from specific networks. It's a virtual machine (Qemu, KVM,…
FireLlama
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Guide to exclude traffic on certain ports (22, 80) from being routed via OpenVPN (client) on Linux/Ubuntu 18.04?

I'm running a VPN client on Ubuntu, and I'm looking for guidance on how to exclude certain ports from being routed through the VPN client (OpenVPN). For example, how would one go about excluding ports 22 and 80 from being routed through the VPN? I'm…
Jean Monet
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AWS EC2 public IP unreachable over IPSec VPN but private IP still reachable

We have a FortiGate (FortiOS 6.0) connected to a IPSec Site-to-Site VPN (Dynamic BGP) on AWS. When the VPN is up, we can only access EC2 using the private IP, public IP no longer works. Only the public IP in the VPC linked to the VPN are…
Joshua
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CentOS7: Multiple Interfaces, default route

[First post here...] Hello everyone, I have a CentOS 7 box which is supposed to become a node of a ganeti-cluster. It has 4 interfaces: eno1, eno2 - on the mainboard ens23s0f0, ens23s0f1 - a dualport 10G Intel adapter I have renamed the 10G…
AndreasBrandt
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what is the route table file

When I run the below command, where is it stored? Or it remains in the memory until a reboot? ip rule add from x.x.x.x table 1 I just wanted to use a custom name for IPV6 which would separate it from IPv4. So I gave table eth0V6 which threw an…
RatDon
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Automatically turn off VPN for select website/IP

Using a VPN for privacy and security on a Unix machine. There are a few sites that I can only access through my whitelisted IP for work. Is there a way to automatically turn off my VPN (or route traffic using my static IP) when accessing certain…
9ete
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