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

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Survive Mac address of client after routing

I am developing an application in which it is very important that I can know the mac address of the client hitting the server. Clients are connected to wifi router (W). Multiple wifi routers (W) are ...
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45 views

How to do iptables nat loopback?

I have a linux server behind the ISP's cablemodem-router combo. With some hacking I was able to make the port forwarding work, and the DHCP exceptions in the udhcpd. But I wasn't able to do the NAT ...
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12 views

iptables for tomato to block all non-vpn traffic

I have been combing through a few forums of many VPNs that have iptables for the tomato router. Most don't work. The one from VPN.ac recommends adding under Administration > Scripts > Firewall ...
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1answer
19 views

iptables connection refused in VLAN network when iptables configured NAT and port forwarding

I have a static IP X.X.X.X. I configured a Linux server as a router by using iptables. The following figures as my network topology: ppp0 +-------------+ +----------+ ...
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55 views

How to automatically mount a NAS in Ubuntu

I'm trying to set up a network attached storage (NAS) in my house to access from multiple computers. My NAS is actually a hard-drive containing all my music, plugged directly into my router. My goal ...
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2answers
159 views

Cannot connect to the internet (even pinging my own router) on any distro

I always run Windows 10 (Ethernet and WiFi work fine) but I dual boot and changed my distro from Arch (~6 months ago) to Fedora (~3 months ago). Fedora used to connect sometimes and sometimes not. ...
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1answer
56 views

SSHFS on Asus DSL-AC68U router

I have an Asus DSL-AC68U router. I can easily ssh to it: ssh router After having configured the proper options in .ssh/config: Host router Hostname ddnshostname User myuser KexAlgorithms ...
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6 views

Can I use UFW to replace the job of a router to route port connections to my applications?

I was on AT&T and had a router and always had to setup port forwarding for a few applications, like Qbittorrent etc. Not tht im on Time Warner Cable all I have is a modem and a switch and im ...
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52 views

How to block access to “private” host-only network from VirtualBox nat interface (separate host-only networks)?

Scenario: 1 VirtualBox host with many vms. Different host-only networks are configured for different vm categories: Some vms are "private", others are "standard" vms. Most of these vms, including some ...
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1answer
85 views

Can I set two default gateway on linux?

I'm using both WiFi + Ethernet on my computer, but the route table settings on Win 7 is different with my Linux(Ubuntu 14.04) computer. win7 will set two default gateway for each device(wife and ...
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129 views

Cannot connect via ssh to server with global IP address

I have the no-ip service running on my raspberry pi, it updates the DNS (no-ip) whenever there is a change to it's IP address. I have enabled port forwarding on my router (Asus rt-n66u) ports 22 ...
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1answer
30 views

How do I create a simple script to kill uhttpd and then start lighttpd?

I have a router running uhttpd by default and there is a process using lighttpd I would like to run instead. Since both processes share the same port, I would like to kill uhttpd then start up ...
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1answer
55 views

Eth0 recognized by ifconfig -a, interfaces correct, cannot connect?

So, I had a WiFi connection "working" with WPA Supplicant. That took quite a bit of doing, and wasn't optimal. The networks would drop out every few minutes. I wrote a script which would reset the ...
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0answers
17 views

download rate limiting based on network usage

I have a Debian Wheezy (Open Media Vault) server with a few different downloaders working most of the time. (Primarily FTP) I would like to be able to adjust the download limits of this server based ...
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2answers
149 views

Multiple machines on single network with same IP

I have a raspberry pi 2 that I'm using for a KODI media center that has the ip address 10.0.0.4. Another pi I just got is showing the same ip (derived from /sbin/ifconfig -a and listed under wlan0 for ...
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1answer
145 views

Using iptables to redirect all traffic to local webserver

Aloha, I'm trying to redirect all traffic on my wifi router to a local webserver using iptables. I'm not sure i have got the command right and also I want to exclude the router IP (172.16.0.1) from ...
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2answers
515 views

OpenWRT: TL-MR3020 Cannot SSH or TELNET into router flashed with custom OpenWRT bin

I have a TL-MR3020 that I flashed with a custom binary built from OpenWRT source. I was trying to enable WiFi and connect to the internet on the router by editing /etc/config/network and ...
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31 views

FTP/SMB client/bridge for Time Capsule

this is my first post here on Unix&Linux :) I just bought a new router, TP-Link Archer C9, and flashed it with DD-WRT... It was my first flash and it took a while to make it working properly but ...
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56 views

How to properly port forwarding between different machines using UFW / iptables and DD-Wrt?

This is my network I want to see my ip_camera (192.168.3.4:80) from outside my house. It is on dd-wrt router (192.168.3.1) without internet. The router 192.168.1.1 has internet. However, i have a ...
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1answer
121 views

Force internet traffic over LAN, but connect to router over WiFi

This is going to seem like an odd request, but it's necessary. I have a wireless router that is not to be used for internet access. The current router that I have is a DLink DIR-626L and I use it to ...
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1answer
75 views

How to scan devices connected to my router that isn't connected to the web?

How to find the devices connected to my router via ethernet/usb that isn't connected to internet and find for example the private ip? My situation is: I am connected to the router via usb with my ...
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50 views

TCP/IP routes when using multiple DHCP servers

I have connected a computer (running Debian Wheezy) to two different DHCP servers (routers) through a cable and through a wifi device. If I look at the routes with route, I get the following result ...
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1answer
109 views

VMs “forgetting” MAC address of gateway on Ubuntu 14.04 host set up as a gateway using 1 NIC with 2 IP addresses on different subnets

I have an Ubuntu 14.04 server with one NIC. The MAC address on this NIC is assigned (by the data centre's gateway) one IP (X.X.X.100) in one subnet (X.X.X.0/24), with the gateway being in the same ...
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6 views

reset of a ubiquiti networks power ap - no love

Had to reset our ubnt power ap. It's on fiber, and should pull ip via dhcp. no pppoe weirdness here. even so, it cannot grab an ip. all cables are connected. tried mtu 1500 and 1492. I have ssh access ...
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47 views

Router setting to access computer via its external IP

I use DD-WRT on my router. A few years ago I happened across a setting that allowed me to access my own computer (e.g. using the browser while a web server was running) using the computer's external ...
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1answer
78 views

OpenVPN clients cannot share their connection to the Internet

Context: a Wifi VPN gateway (Linux Ubuntu computer) Simply One distant Server (www.example.com) and One Client (Paul, Ubuntu Linux, gateway) linked with openVpn. Server allows Paul to ...
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65 views

Questions about setting up an OpenWRT Router as a client and ethernet ports

I'm fairly new to Linux and wanted to create a little OpenVPN setup. I have a computer setup with an openVPN server and a (cheap TP-link) router with openWRT and OpenVPN (client). Basically, I want to ...
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107 views

I can't ping the gateway

The network error is that I can't ping the gateway after ip forwarding configuration. Here's the my configuration: linux microcore(server)(First PC) sudo su ifconfig eth0 192.168.2.200 netmask ...
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1answer
229 views

OpenWrt bricked router is not connected via USB to serial cable

I am a newbie in OpenWrt development. I have a problem in my router when I try to upgrade my router (TP-Link TL-WDR-3600) to openwrt firmware via web ui. Now my router is bricked and I can't ...
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2answers
84 views

Unlocking all ports in a router when using Linux

I heard that Linux's open ports are not very vulnerable, so a normal desktop Linux installation doesn't need a firewall. Still, my router (Dlink) blocks some ports, even in LAN. Would it be a bad ...
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0answers
156 views

Flash OpenWrt Routers from Telnet

I have two routers. One has Chaos Calmer and the other has Attitude Adjustment. When I turn them on and check arp, nothing comes up. When I check route, the hardware address says (incomplete) but the ...
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173 views

OpenWrt with Nodogsplash

I have a web application in MVC4 for Hot Spot Management system. I using it with OpenWrt and Nodogsplash, Now i need to authenticate the users in to external website. Is there any way to allow to ...
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61 views

Arch Linux Wireless Problems

I've got a problem with my wireless connection, the wireless bar is always showing 3 bars, I am using NetworkManager with dhclient and the strangest thing happens, I am getting a huge lag spike every ...
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2answers
2k views

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 ...
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1answer
66 views

Transmitted packets on a LAN interface may increase received packets on WAN interface?

Supose a simple home router gateway and the following: lan0 - Network interface responsible for LAN-side of the router wan0 - Network interface responsible for WAN-side of the router A default route ...
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1answer
243 views

Open Wrt with nodogsplash

I am using OpenWrt in my TP_Link TL-WRD3600 router. I have already set up a hotspot plugin (Nodogsplash) on my router. Now I need to allow access to some website before authentication on the splash ...
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41 views

Is there any way to configure fully automated proxyclient for workstations?

My network diagram is similar to above image; pc-router is also acting as firewall & I'm running squid on it. pc-router is running debian Vlan having workstations running fedora, ubuntu and ...
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2answers
601 views

OpenVPN and MerlinWRT

My ASUS router is flashed with MerlinWRT. This configuration used to work, however now when I connect I get, $ sudo openvpn ./client1.ovpn OpenVPN 2.3.2 x86_64-pc-linux-gnu [SSL (OpenSSL)] [LZO] ...
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1answer
123 views

How to use the same Wi-Fi adapter to connect to a wireless network, and broadcast an AP at the same time?

I have a Wi-Fi router that runs OpenWRT. It connects to my home Wi-Fi and uses it for Internet access. At the same time, it broadcasts an access point itself and it is bridged with its LAN so other ...
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0answers
44 views

load balance router

i am do live far away from the local exchange and the DSL is quite unstable. it can get days without service. so i decided to invest in a usb 3g stick (10GB/month, ppp0 in my system) and a usb wifi ...
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1answer
77 views

dd wrt firmwire file prompt password while extracting

I am a newbie in using dd wrt firmware development. Last day i download a dd wrt firmware dd-wrt.v24-21676_NEWD-2_K2.6_mini-e900.bin for Linksys E 900 router. I need to extract this image for ...
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1answer
114 views

Setting permissions on SMB

My router (Netgear DGN-2200-64) has a USB port usable as SMB storage (with the default firmware - I guess it's Linux under the hood). I plugged in an old flash disk (FAT formatted I think) & set ...
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0answers
135 views

Switch gateways on failure (WRT)

I have two WRT routers each connected to their own wireless gateway (cell phone and hotspot across the street). The routers lans are bridged with WDS and on the same subnet, so clients can connect to ...
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2answers
184 views

How to get IPs via DHCP, through a router from another DHCP server?

ISP -> OpenBSD box -> Wireless router We have an OpenBSD machine that connects directly to the internet, has dhcp/dns cache "server" on it, and forwards the connection to clients via ethernet ...
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579 views

CentOS as home network router: IPTables Port Forwarding failure

I have currently set up a home server with a CentOS 6.6 installation on it. The server has two NIC interfaces which I'm using it as my router and DHCP server. Here's a diagram showing the network ...
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1answer
48 views

Is there a way to switch interface only by interface name?

I am currently working on how to switch network interface in Linux environment. And i am experimenting on switching network interface by switching default gateway, for example switch to wlan0 when ...
2
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1answer
133 views

On a router, what decides if a packet should be forwarded or directed into the router itself?

I'm trying to learn how packet routing works on a linux-based router (OpenWRT in my case) a bit better for setting up a few projects/just-learning. Referencing the below chart, I'll break this into ...
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3answers
142 views

Get Any Interface's Router Address

How can I know what the router's address is when I am on multiple interface? I know by using netstat -rn I can have the dominating interface's gateway, which is the router's address. But what about ...
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1answer
191 views

Can't connect Wifi devices to router when wired Ethernet computer is connected

I have a arch desktop with samba and ssh configured connected to a WiFi router/ADSL2 modem via ethernet. I was not able to connect any of my mobile devices (phones and tablet) or my netbook (running ...
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153 views

iptables - How to remove connection tracking

I'm using this command for redirect all web traffic (http) into my local web server iptables -t nat -I PREROUTING -p tcp --dport 80 -j DNAT --to 192.168.11.100 Then i test, access a website and got ...