Questions tagged [router]

Questions about running a UNIX-like OS (typically Linux) on wired and wireless routers, including flashing, creating, and configuring custom firmware.

A home or small office router typically has one WAN port, up to four LAN ports, and up to two WiFi radios. More importantly for this site, most of them actually run Linux and can be flashed with custom firmware allowing full access to the underlying operating system. Examples of custom firmware include OpenWRT, DD-WRT, and Tomato, though there are many more.

This tag includes:

  • Flashing custom firmware
  • Creating or modifying custom firmware images (but note that questions about actually writing software belong on Stack Overflow).
  • Configuring custom firmware once installed, especially using basic UNIX tools.
  • Using the basic tools that are part of said custom firmware (e.g., opkg).

Some of the above may additionally have more specific tags.

Questions about connecting your UNIX box to an existing WiFi network should go under , , etc.

Questions about IP routing, including on desktops, servers, or workstations should use , either in place of or in addition to this tag, depending on if a "router" is involved.

If you're an IT professional asking about routing in an enterprise or ISP network or using (non-Linksys) Cisco, Juniper, etc. gear, consider Server Fault.

Questions about configuring a SOHO router in general, especially using the stock interface, probably belong on Super User.

279 questions
48
votes
2 answers

Why does sh say "not found" when it's definitely there?

Possible Duplicate: “No such file or directory” lies on Optware installed binaries I'm trying to add ebtables to a little router box. I went and got a binary compiled for the correct architecture, and put it on the box in /sbin/. When I do…
Shawn J. Goff
  • 45,338
  • 25
  • 134
  • 145
36
votes
4 answers

Find out network traffic per IP

We have one central server which functions as an internet gateway. This server is connected to the internet, and using iptables we forward traffic and share the internet connection among all computers in the network. This works just fine. However,…
please delete me
  • 2,419
  • 5
  • 28
  • 28
19
votes
1 answer

How can I disable UFW logging for a specific event?

My router sends out multicast packets in regular intervals that are blocked by UFW's standard policies. These events are harmless but spam my syslogs and ufwlogs. I can't change the router's behaviour as that would require installing a modified…
Glutanimate
  • 2,168
  • 4
  • 22
  • 38
19
votes
3 answers

Why does traceroute display many ip addresses for the same hop?

Here is the route path from my home to sina.com.cn. traceroute -n sina.com.cn traceroute to sina.com.cn (202.108.33.60), 30 hops max, 60 byte packets 1 192.168.31.1 0.476 ms 0.587 ms 0.695 ms 2 140.0.5.1 2.557 ms 2.699 ms 3.065 ms 3 …
scrapy
  • 323
  • 4
  • 12
  • 27
15
votes
3 answers

What are the interface prefix meanings in ifconfig?

I'm not sure if these have a name, but on most computers I use the interface prefixes are usually: eth- : Ethernet/Wired wlan- : Wireless/WiFi However, on my ASUS RT-N56U, I have the following: br0 : 'Ethernet' - Bridge? eth2 : 'Ethernet', IPv6…
Ehryk
  • 1,822
  • 3
  • 20
  • 22
10
votes
2 answers

How to setup PPPoE with OpenWrt

Probably this is a simple question, but I can't find an answer... I have an ADSL router (Dlink DSL-524T) which runs OpenWrt Backfire 10.03.1. It connects to the internet using PPPoA: this is my /etc/config/network file: config 'interface'…
zar
  • 245
  • 1
  • 5
  • 11
8
votes
3 answers

Where is iptables script stored on DD-WRT filesystem?

I have an ASUS RT-N16 router that I've flashed with the open-source DD-WRT firmware. According to my ssh login, I'm running: DD-WRT v24-sp2 mega (c) 2010 NewMedia-NET GmbH Release: 08/07/10 (SVN revision: 14896) I'd like to be able to customize…
PattMauler
  • 373
  • 1
  • 3
  • 10
7
votes
2 answers

Debian Squeeze as a router

I'm trying to setup Debian Squeeze (ala Dreamplug) as a router. I can't seem to get the pieces to fit together. ETH0: Upstream/internet - DHCP-Client ETH1: Downstream/Lan - 192.168.0.1 DHCP-Server sudo vim /etc/network/interfaces auto lo br0 iface…
WernerCD
  • 1,314
  • 3
  • 10
  • 11
7
votes
2 answers

How to build a gateway from my Linux OS

I want to configure my Linux so that it will be used as a network router (gateway). Can anybody give me some hints on this? (links are welcome!)
artaxerxe
  • 473
  • 3
  • 10
  • 20
7
votes
3 answers

Do I want a Repeater or a Bridge? (OpenWrt)

I'm setting up a network with openwrt. I have a router that I have set up for wifi which I will use as an access point. I want to add another router to my network so that the two can exchange traffic wirelessly. Right now, my computer is connected…
user461262
  • 147
  • 1
  • 1
  • 9
7
votes
1 answer

ARP request with wrong IP address

I have a strange problem with a Linux router. The setup is like this: host1 === Linux router === host2 a.b.c.d --- a.b.c.e/g.h.i.j --- g.i.h.k Every five minutes host1 tries to reach host2. If host2 is down, the Linux router makes an ARP…
Mathias Weidner
  • 116
  • 1
  • 3
6
votes
1 answer

Use dnsmasq to pushing routes to my clients on a small local network

I'm trying to use dnsmasq to pushing routes to my clients on a small local network. However my clients (Server #1, #2 and #3) can not use these routes. The dnsmasq service is running and I do not know what may be going wrong. This is the content of…
Eduardo Lucio
  • 664
  • 2
  • 13
  • 34
6
votes
2 answers

Linux Networking routing to virtual ip addresses from a different subnet

New to linux networking, had a question about routing to virtual ip addresses from a different subnet. I have three servers (they can all ping each other): A 10.10.51.182 (connected to router Y) B 10.10.51.183 (connected to router Y) C…
Saad Malik
  • 163
  • 1
  • 1
  • 5
6
votes
2 answers

Accessing router from a command line

Is it possible to access a router and login from a command line ? I'm well aware of firefox 192.168.1.1 but are there parameters that can be added to this so that it's an immediate login from the browser, i know of telnet 192.168.1.1 but I'm…
Jojo
  • 61
  • 1
  • 1
  • 4
6
votes
2 answers

SSH tunnel to router periodically hangs. TCP problem?

Something weird I've noticed since upgrading my office router to the Buffalo WZR-HP-G300NH. When I remote in using an SSH tunnel, the tunnel will "freeze" pretty often. The freeze lasts 1-2 minutes each, after which all the traffic that was stuck…
Barry Brown
  • 461
  • 4
  • 12
1
2 3
18 19