Questions tagged [router]

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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Can a NAT router run out of ports?

The highest TCP port number is 65535. If a router doing NAT uses an ephemeral port for each connection made to the internet on behalf of the hosts on the internal network, does this mean that it is ...
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ssh via public ip address

I have a VisionFive V1 risc v single board computer running Fedora. It is connected along with a raspberry pi to a router. The router has port 22 open and a public ip address. I can access the ...
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How to reflect the name of Beaglebone in the router panel?

For my BBB, my router displays the following: But I'd like it displays the hostname of my BBB. How to do that? So far, I have modified the hostname with $ sudo hostnamectl set-hostname myname And ...
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Debian Router, UFW, WAN/LAN with IPoE ISP

I have a Debian Bullseye box setup as a router, NAS server, Asterisk PBX, and using PrivateInternetAccess (PIA) as my commercial VPN. Also have the box setup with PiHole to reduce unwanted ads. The ...
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Create network between physical machine and ubuntu vm running docker hosting a “Stack“ of containers, with two web applications, an Nginx proxy

I have to configure a WM with ubutu in the virtual box that will be the server, it will run a container with two web applications and an nginx proxy, accessed directly from the Windows environment, ...
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Unable To Access Port Forwarded Content via Domain Name/Public IP Address From Within LAN

I have iptables setup to forward Traefik ports 80 and 443 to WAN, and am able to view the content via my public IP address and registered domain name from outside of my LAN (tested on mobile with WiFi ...
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1 answer
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SSH working with router turned off. SSHing through Powerline Adapter?

Today I have noticed that I could continue to SSH between two (unix) computers on my private network, despite having my router turned off. I was very surprised. After turning off my wired network on ...
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Home router on Fedora Linux

I've got a PCEngines micro PC with 4 ethernet ports, whole point was for it to replace my dying WatchGuard box. I'm not exactly new to Linux Firewalls but this is the first time I've tried anything ...
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New install of Linux Mint 20.2 Cinnamon (5.0.4) has ~50% packet loss - Caused by router?

I have recently installed Linux Mint 20.2 Cinnamon (5.0.4) (Kernel 5.4.0-74-generic) on my desktop on a separate drive from a Windows 10 install. On Linux I noticed very inconsistent connections when ...
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How can I MASQUERADE between vlan bridges

I have created two VLAN bridges in openwrt based system which has single physical interface. *) eth0->lan->br-lan *) br-lan->br-lan.2(VLAN INTF)->br-vlan2(BRIDGE INTF) *) br-lan->br-lan....
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DBUS CMD on Access Log of Router

I'm using an ONU-router combo from ISP. There're logs appear regularly on the Access logs of the router as follow: [Warning]Terminal:DBUS,Source:324,Cmd:GetNeighbourApNum Does it mean the action ...
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How to add proxy server settings in wifi router or access point

I have squid proxy server running in centos 8 i want to setup proxy server in wifi router or wireless access point which i can force wireless clients to go through proxy server.
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How does ping command work internally

I have Ubuntu 18.04 and two network interfaces (eth0 & wlan0) attached to it. So, I have effectively two LAN's (say LAN1 and LAN2) When I fire a ping command simply like ping followed by some IPv4/...
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Router blocking one specific device

I'm trying to connect my computer to the internet via a new router, and it is refusing to work in the most baffling way I've ever encountered. If I just connect to the wifi network in the normal way, ...
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2 answers
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can‘t ping the ip addr after send a wget request

I am facing a problem while try to visit a remote website address. Please help me out. first.everything is ok. second.send a wget request.and recive "Connection reset by peer" then.ping not ...
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1 answer
108 views

Delete illegal router from network

I have a default gateway with IP address 192.168.1.1 and MAC address 5c:77:76:6e:0d:7b. It is my only wi fi modem router from which I receive internet. But in input nftables logs I saw another one ...
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Compatible custom firmware for TL-MR3220 V2 with upgraded 8/64MB memory

First bit of background: I have been using OpenWrt since 2015 on TL-MR3220 V2 with 4/32MB memory. It was running great. Recently, after buying a MI 4A gigabit router I stoped using the TP-Link router. ...
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Can I force router changes from linux CLI, like port forwarding with UPNP?

I have seen that I can use miniupnp to apply port forwarding on my router, and I would like to find another tool to apply DNS and/or DHCP settings on the router. Is this possible? My goal is to have a ...
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How to forward packets between different bridge?

We have two bridge interface br-office and br-guest on the OpenWrt AP, use external DHCP server, network topology such as: Internet 1 Internet 2 ! ...
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How to connect internet automatically during startup?

The os recognize my ethernet device as enp6s0. ifconfig -a enp6s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.31.22 netmask 255.255.255.0 broadcast 192.168.31....
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Retrieve "managed" flag of router advertisement from build-in IPv6 SLAAC support

The linux kernel has support for IPv6 SLAAC (stateless address auto-configuration) and is able to process received router advertisement messages. BUT: As much as I can understand, the kernel is not ...
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1 vote
0 answers
68 views

Multi-WAN CentOS router - Xfinity connection is Xfinicky. All other WAN connections work fine

This problem has been driving me crazy for days. I'm working on a prototype for a mini router/VPN client device to deploy to our employee's homes. Currently due to family circumstances I'm actually ...
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-4 votes
1 answer
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"ping 10.26.14.16" is successful. "nmap -p 5016 10.26.14.16" is unsuccessful. Why?

192.168.1.*/27 : | +--- FW | +--- [192.168.1.133] A | +--- [192.168.1.140] B | : A = linux machine as a router [192....
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2 answers
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Linux as a router to forward

How to make an OpenStack instance to forward route to another Linux machine which is not OpenStack instance but in the same LAN? PC_A has 192.168.1.133/27. PC_B has 192.168.1.140/27. PC_A has 10.26....
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iptables appears to be impacting data flowing from one subnet to another on Asuswrt-Merlin

First and foremost: this post is referring to a Linux distribution called Asuswrt-Merlin running Linux kernel 2.6.36.4brcmarm. I am attempting to share data between two VLANs on this device. Every ...
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3 answers
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Blocking internet of an DHCP assigned static IP, but allowing internal LAN network to get to device

I have a Rasberry Pi that DHCP assigns a static IP address (Based on it's MAC address) at 192.168.2.12 with the Local gateway at 192.168.2.1, I want to block internet traffic to it and from it, but I ...
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3 votes
1 answer
514 views

How to wake-on-lan via internet with python code?

My home network diagram is simple as below: internet --> Optical modem --> router --> pc1 ,pc2 111.111.111.111--> 192.168.1.1 -->192.168.31.1 --> 192.168.31.144,192.168....
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dnsmasq does not resolv dns subdomains that are forwarding to the domain

i have a strange problem with dnsmasq. It does not resolv dns subdomains that are directing to domains. Example: https://t.newsletter.otto.de/r/?id=h494cd19e%2C323e1c29%2C25c7c155&p1=1&p2=...
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1 answer
861 views

How to debug: ssh_exchange_identification: Connection closed by remote host

SSH by private IP is fine I'm able to connect to a server through SSH by its private IP address: C:\Users\m3>ssh -vvvvA uconn@192.168.1.11 OpenSSH_for_Windows_7.7p1, LibreSSL 2.6.5 debug3: Failed ...
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1 vote
0 answers
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Linux Router for Public IPv6 dropping packets for 27 seconds

I use a CentOS machine as my router at the data center. Its doesn't do any NAT. It just routes my public ips. The DC routes my blocks of ips to the WAN interface and the router passes them through to ...
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1 vote
1 answer
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Bypass OpenVPN on Linux Router for a specific IP on LAN

I use an Archlinux as a router on a computer on my network to encrypt all the Internet traffic through VPN. But I need to bypass Openvpn for one device on LAN. Its IP address is always 192.168.0.111. ...
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1 answer
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NVRAM Variable syntax

I'm trying to edit the client_customlist variable in my router with Merlin firmware, and am a bit confused with the syntax; when I export it and then look at it, most of them end with 3 >, like ...
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0 votes
1 answer
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Networking between 192.168.0.0/24 & 192.168.2.0/24 Results in Partial Packet Loss

I am attempting to route between subnets 192.168.0.0/24 & 192.168.2.0/24 across two separate routers. The first router (192.168.0.1) manages 192.168.0.0/24 and the second router (192.168.2.1) ...
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1 vote
0 answers
38 views

VPN on router: Mac OS ignore DNS

hopefully someone can help because even the VPN customer care could not. I have setup a VPN (OpenVPN) on my router (Asus AC56U) like I did other a lot of other times. In the past, everything worked ...
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Networking: Cannot ping across router in one direction (can ping in other direction)

Here's my network topology: ISP: 192.168.0.1 pfSense: (ip dhcp) <-> 192.168.1.1 pfSense does outbound NAT such that all traffic passing out of interface (ip dhcp) is NAT to map all "...
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1 vote
0 answers
59 views

Is it possible to deploy a server with two network interfaces with IP addresses on the same network?

I have a Raspberry-Pi set up as a router which routes traffic between two networks 192.168.1.x and 192.168.2.x. For reasons which are imposed on me by the physical network topology in my house, I want ...
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Trying to use inbuilt shell command "update" to flash custom firmware to router and it asks for devname

I'm a newbie to linux and embedded systems and I've been trying to flash my router with custom firmware for a while now. I managed to find a matching .bin file but the included update command needs a &...
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1 vote
1 answer
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Raspberry Pi as a Routed Access Point

So I am following the recipe below using Raspberry OS Buster Lite: https://www.raspberrypi.org/documentation/configuration/wireless/access-point-routed.md I can connect my laptop to the Pi (hostapd ...
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1 answer
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Install Debian on Mikrotik RB 2011 routerboard

Is there any way to install Debian sid on Mikrotik RB 2011? Seems to Debian MIPS port not support this type of cpu (Atheros 600MHz 74K MIPS big-endian), I already install OpenWRT on this device, need ...
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-1 votes
1 answer
840 views

After upgrade to fios and G3100 router, wireless printer no longer connects

I'm running slackware64-current (current distro downloaded 9/1/19) and using a brother HL-L2395DW printer. And up until 7/28/20, my internet was verizon dsl using a westell 6100 modem/router. I used ...
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0 votes
1 answer
39 views

Will a router with a firewall block forwarded packets from a sub-LAN network?

I have a system that looks like so: +----------+ +--------+ +--------+ | | | | | | | Internet |<--->| Modem |<--->| Router | | | | ...
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1 vote
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Triangular network topology: Incorrect entry in routing table. (Persistent between reboots.) (Debian 10 & Raspberry Pi)

My Debian 10 workstation has 2 network interfaces. This is my routing table (simplified) ip route default via 192.168.2.254 dev enx0050b668976b proto dhcp metric 100 10.0.0.0/8 dev enp6s0 proto ...
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1 vote
1 answer
248 views

In IPV6, what should I do if the last 2 boxes only contain 3 characters?

I'm setting up a new router which actually allows me to change both my IPV4 and IPV6 DNS Servers. I'm adding AdGuard DNS for both and setting up the IPV4 was no problem at all since I've done it a ...
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2 answers
180 views

Wake on lan from custom router (raspberry pi)

Continuation from this question I want to send magic packet for wake on lan from my custom router(raspberry pi). Below is network image; I used wakeonlan to send magic packet. However, Desktop PC ...
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1 answer
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Raspbian router configuration: cannot ping devices on other side of router?

I've got the following network setup [ISP Router] <---> [Raspbian] <---> [Debian 10 Workstation] Here's some info from my Raspbian "router" iptables has been flushed with iptables -F, ...
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1 vote
1 answer
222 views

Wake on lan via my custom router

I want to use wake on lan via my custom router. Below image is my networking image. I could make connection from smart phone to raspi3 using google cloud platform and VPN (softether), and from raspi3 ...
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1 vote
1 answer
76 views

Routing on all interfaces

I recently got a small single board computer to replace the horrible router provided by my ISP. Following this example: https://www.openbsd.org/faq/pf/example1.html em0 is my WAN, em1 is an AP, and ...
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2 answers
40 views

Counting bytes on all connections traversing a Linux router

I have a Linux box which works as a router. How can I measure which connections send and receive how much data? For each hour, I would like something like: src_addr src_port dst_addr ...
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1 answer
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telnet refuses to connect when /bin binded to another location

I am working on a router and its firmware is read-only as expected. The busybox they used are trimmed down version of the original tool so i cannot use all the tools necesseray. This router has also a ...
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Intermittent internet connection/DNS issues with Debian

For the last 15~20 days I've faced a inconsistent connection issues. I've tried several things, and mostly I can't say if they helped or not. What I can say for sure: When returning from hibernation, ...
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