Questions tagged [routing]
the process by which data packets on communication networks are forwarded into the direction of their ultimate destination by routers.
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How to monitor backbone link for bandwidth problems?
Is it possible to monitor the performance of specific internet backbone links, without special access? Or are there any maps or reports publicly available to show the current health of such links?
I ...
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Bypass closed ports with another server, without routing all data
I have two Linux servers. Server A hosts various services, including a website, and has good internet (~500mb/s). However, server A is behind an ISP that does not allow me to open ports. Server B ...
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Google Fiber WAN PoE passthrough two ports of managed switch?
I have a network configuration I would like to make happen, but I'm at a loss at what to call this odd setup, which makes searching quite difficult.
I want to substitute the Google Fiber Networking ...
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Why does ip6tables lose packets after PREROUTING to a different interface?
I'm using ip6tables to nat packages to an IP on a different interface (localhost), but all packets sent there are lost.
I have the same iptables rules for IPv4 where everything is working fine.
Setup
...
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2 computers on the same subnet of an ISP can't talk
I have networks connected to the same ISP. Both routers are configured with a static IP like:
Router 1:
Static IP address: 123.123.123.201
Subnet Mask: 255.255.255.0
Gateway: 123.123.123.1
Router 2:
...
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105
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access web server on private network
I would like to access a web server(10.0.0.3) on private network via other machine, that has connection to the private network(10.0.0.2) and has a public ip too(23.88.XXX.XXX).
I am trying with this, ...
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How to add a static route to a host via interface using 'route' tool?
I'm new to *bsd systems. Usually in linux-based I add routes like that:
# eth0 ip address
ip a add 10.100.1.2 dev eth0
# gw is accessible via eth0 interface
ip route add 10.100.2.1 dev eth0
# ...
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188
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Injected packets using libPCAP library is not seen from python socket sniffer and netcat
I am using libpcap to transmit packets between two VETH pairs {veth1, veth1peer} and {veth2, veth2peer} and using each others peer to inject packets upwards to veth1 or veth2 and disabled "rp-...
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267
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Forwarding (local) RTSP/HLS traffic via VPN to expose on WAN IP of VPS
I feel like I am overcomplicating this extremely by wanting to do it securely, so a fresh look at this would help a lot.
I have a webcam that I want to publish / embed on a website. My current setup ...
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201
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Forward all incoming traffic without redirect
How to forward all traffic to another domain?
serverA has a serverA.com domain
serverB has a serverB.com domain
I want to forward all incoming traffic from serverA to serverB
For example, when ...
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2k
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Routing KVM VM traffic over wireguard from host OS
I'm trying to setup a Wireguard tunnel on my host OS and route all network traffic from a specific KVM VM over this Wireguard VPN. My KVM VMs are setup using bridged networking. The interface name on ...
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Routing some traffic through an Azure point-to-site vpn
A client is setting up some AWS resources for people from my company to access. They are requiring that we setup a VPN so that they can whitelist just the gateway's public IP. I've setup an Azure VPN ...
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266
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Block IPs without receiving traffic
I'm hosting on OVH Game dedicated server, the bandwitdth of this server is 1gbp/s, I'm receinving attack from other OVH Servers and they are saturating the bandwidth with 1gbp/s.
OVH doesn't filter ...
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537
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How to setup routing for a Linux VPN server with separate ingress and egress IPs
I am setting up a Linux server as a VPN using Wireguard (previously configured via Algo, now doing it myself). My goal is to have two different public IP addresses: one for ingress (VPN clients ...
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Windows machine not routing traffic to correct NIC
I have a windows laptop with two NICs. One is a wireless interface (used for general internet usage), the other is cellular modem using a SIM which makes it a part of private network (IP 10.100.100.12)...
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Routing packets from VPN interface to other pods change source IP
I have a pod that runs WireGuard, IPv4 forwarding is enabled in that pod, thus all packets sent from WireGuard clients are routable to the other pods.
WireGuard client -> WG-NIC inside WireGuard ...
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Quagga OSPFv3 does not update IPv6 routes
NOTE: I've posted this on SuperUser but reposting here because I think it may be more suitable.
I'm trying to configure Quagga to use OSPFv3 to create proper IPv6 routes between two OpenWrt routers ...
- 171
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How can I have a fixed IP to the randomly selected OpenVPN server?
We currently run a single OpenVPN server with clients that run apps that talk to it via its (unfortunately often) hardcoded IP 10.8.0.1.
We're switching to multiple OpenVPN servers on the same host, ...
- 111
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Routing only tcp outgoing traffic through a tun0 interface
I have an ubuntu 20 system, and I'm trying to create a tunnel between my system and a remote server since my client system can't have any incoming/outgoing TCP traffic.
I created a tun0 virtual ...
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How does a vpn route all traffic through it's tunnel but allow it's own traffic to go over the internet
TL;DR
I want all outgoing traffic from my system to be routed to a tun0 device, wrapped with DNS packets and then sent to the internet, but the DNS packets also gets routed back to tun0 device.
...
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USB wlan1 Hotspot stops working when eth0 cable is plugged in
I setup successfully an USB wlan1 as AP via hostapd, and isc-dhcpd (it listens only to wlan1-interface) on a Raspberry 4 (using Raspbian). Regardless if wlan0 (the onboard WIFI) is connected to a WAN ...
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How can nftables be configured using a declarative specification?
How can nftables be configured using a declarative specification? I've been reading up on Firewalld, iptables commands, etc. I'm looking for a way to write the rules in JSON, YAML, TOML, etc. and just ...
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Route traffic to Kubernetes cluster using iptables
I have a kubernetes cluster (currently only 1 node) running on my root server (netcup) and try to route traffic to it. Im pretty bad in networking so hopefully someone can help me.
On the cluster ...
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How can I connect two routers to the same switch
First of all, I'm not talking about those all-in-one routers that do wifi/switching/routing. It drives me nuts when people call a Wifi box a "router". Anway, I would like to do the ...
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246
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Routing packets between two nics on the same system
I have a small network setup with a ubuntu router that has two nics.
enp2s0 is used to set up a network with vlans, enp3s0 connects to a different local network.
enp3s0 ip 192.168.53.203/26
enp2s0 ip ...
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1
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732
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How to map a subdomain to a specific port on the server? [duplicate]
I have a server that has a docker container running on port 443 (registry), which I access by addressing https://registry.mywebsite.com. I want to also direct https://pages.mywebsite.com to that ...
- 111
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Best practice for preferring the network interface that actually has internet?
I have an embedded device where I have three network connections, eth0, wwan0, and wlan0. wwan0 is a metered connection, so I would generally prefer eth0 or wlan0. The problem is that at any given ...
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What are the downsides of using IPv6 Multicast for majority of all communication including one-to-one?
Given IPv6 Multicast allows for a sub-pub communication model, it seems like a no-brainer for the vast majority of communication, but its very rarely used beyond video streaming, and I'd like to know ...
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Two Subnet Routing
Consider the following scenario
Network 1
Switch (Call it Switch1) with the following connected appliances
Old Windows 2008 Server (Old Domain Controller) with interface IP 192.168.2.113 255.255.255.0 ...
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Openvpn unable to ping on-premises servers (port unrechable)
I have configured as an OpenVPN server (Debian) and other servers in Azure network 172.20.0.0/24 which is connected to on-premises network (10.1.0.0/24) via site-to-site VPN IPsec tunnel.
Connection ...
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proper way of NATing and Routing when using TUN interface with iptables
edit: I'm a newbie in networking and discovering new things :)
I created a TUN interface programmatically and able to interact with.
I set it up and running by
ifconfig myTun 10.10.1.1/24 up
and its ...
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1
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202
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VyOS on AWS EC2, new IPSEC tunnel won't pass traffic- what am I missing
This is an existing environment that I just stepped into. Running VyOS as a AWS EC2 instance, which handles all of the site-to-site routing for our company. Everything is already up and working. We ...
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load balancing with Bird
I have the following routes pushed into my edge router
192.0.10.0/32 via 192.168.166.110 on br166 [master01 22:53:55] * (100) [AS64514?]
via 192.168.166.116 on br166 [worker_03 ...
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PC/Switch (in one subnet) connect to Switch (in another subnet), but not to PC connected to the switch
[UPDATE]
The problem/behavior described below was caused by the public network connection on the system -which had a default gateway. The unusual behavior was a result of the private network sending ...
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1
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246
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List all active devices in different subnets?
My company has a class A network that contains various subnets. I need to automate a way to produce a list of all online devices (in all the subnets). To start, just a list of responsive private IPs ...
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Multiple interfaces and networks with Netplan: can't ping local network
My netplan config, with multiple interfaces and networks, works perfectly apart from ping to (or from?) local network.
Here's my setup:
network:
version: 2
ethernets:
ens160:
dhcp4: no
...
- 123
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810
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How to forward traffic from one LAN router through another router then to the original gateway?
I have two routers connected to my ISP within one town in the subnet 192.168.0.0/24.Router A can reach router B successfully. I have higher bandwidth on router A than B. I would like to make A the ...
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Syntax Iptables and routing UDP protocol
I have a debian routeur server with two interfaces, one on the net, and one on the DMZ.
I want to route the UDP protocol to internet to DMZ.
What about this rules?
iptables -t mangle -A INPUT -i [...
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809
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Linux randomly routes packets to the wrong interface
I own a dedicated server with some kvm vps running for my clients.
My main network is 192.168.1.0/24.
The vps have a dedicated network 192.168.2.0/24 on a bridge interface brv6.
The ipv6 traffic goes ...
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How to SSH into a computer connected to a modem while connected to a router that's bridged to that modem?
I have a Modem/Router (NAT) that authenticates to my ISP's fiber optic cable. This modem has one ethernet cable connected to my Computer and another to the WAN port of a Wi-Fi router.
The Router is ...
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Debian Server - clients can't ping between interfaces/subnets
I can't ping clients between interfaces/subnets e.g. pinging from Mac (10.42.0.82), which is connected to eth0 to the Android (10.42.1.150) which is connected to wlan0.
Note: I can access internet ...
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659
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How to connect to PLC that has an unchangeable static IP and no gateway
Summary
I've got a PLC that has a static IP I can't change and a gateway that can't be set. I need to be able to talk to the PLC over TCP on my corp network. Seems like a good candidate for NAT...
...
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1
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WireGuard Double VPN: Only forward WireGuard traffic
The Goal: A VPN chain
I'm attempting to achieve a VPN chain. The first server is my own VPS, while the second one is from Mullvad VPN. I use my VPS for multiple purposes and I would like to only ...
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Can't make v2ray to send DNS queries to its localhost
There are two v2ray servers A and B with similar configurations but A works as an intermediary (vmess+websocket on both inbound and outboud) to reach B.
I want to make A to send incoming DNS queries ...
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How to bypass whitelist based internet censorship
How can we bypass internet censorship in Iran
In Iran government blocked internet access to global and we can only access servers that hosted in Iran datacenters.
I think they used whitelisting ...
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Route traffic on datacenters without traffic usage
Imagine you have 2 servers, one on OVH and another one on Hetzner and each of them has a 500GB traffic usage limit.
can you route traffic from Hetzner to OVH without traffic usage for Hetzner?
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246
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Windows Server 2016 unpredictable static routes
I am configuring routes on a Windows Server 2016 machine.
I've already set up a Lan to Lan VPN as follows on a DrayTek router:
Local network: 10.23.42.96/29
Remote networks: 10.41.73.0/24, 10.41.86....
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268
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Proxmox Networking configuration with multiple VM
I have purchased a dedicated server from Hetzner and it comes with a single IP address. I installed Proxmox and now this IP is used to access the web portal.
I got another IP address for a VM on this ...
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124
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Ping device connected to host having LAN access
I've been playing back and forth routing games for a couple of days.
As it is quite hard to describe with words I made a diagram below:
What I want to achieve is being able to ping Rpi 4B from Rpi 3B ...
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89
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Using reserved / deprecated IPv6 ranges on older linux kernels
I have an old Synology NAS with kernel 2.6.32.12.
And I use the Yggdrasil network, which uses the deprecated range 0200::/7 for addressing.
About the range 0200::/7:
http://www.iana.org/assignments/...
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