Questions tagged [iptables]

is a user-space application to configure the Linux kernel firewall tables. These tables contain chains of rules defining the treatment of network packets.

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Using cgroup module in iptables cause "no chain by that name" error message

Trying to use cgroup module in iptables rule cause "No chain/target/match by that name" message. I'm using: Linux raspberrypi 4.19.42-v7+ #1219 SMP Tue May 14 21:20:58 BST 2019 armv7l GNU/Linux ...
7 votes
1 answer
10k views

Open Splash Page After Connecting to Wifi Hotspot

I'm using my pi3 to display a local "website" as described here Making a Raspberry Pi 3 accessible w/o configuration via WiFi and static IP/URL. Therefore, I'm creating a hotspot with the pi. This ...
0 votes
1 answer
244 views

Buster: Route traffic eth0<>wlan1

I followed these excellent and simple instructions to set up a WiFi repeater on Buster: [Access point as WiFi router/repeater with additional WiFi-dongle However when I rebooted the eth0 access was ...
15 votes
4 answers
156k views

How to open a Raspberry Pi Linux port?

I need to open TCP port 25 on my Raspberry Pi 3. I watched videos on the internet re. iptables, nothing has worked. If you have a solution, using iptables or another method, that would be great. If ...
0 votes
0 answers
40 views

Raspberry as a bridge between networks

How I have to configure iptables for redirecting traffic between wlan0 to eth0 of a raspberry pi? In my scenario eth0 is the interface connected to the home LAN with static ip 192.168.1.199, wlan0 is ...
0 votes
0 answers
94 views

Network routing between wlan0 (access point) and wlan1 (internet connection) not working

for the past three days I have been trying to create a WiFi relay with my PiZero to then make into a Tor Router following a variety of guides online. I am using the built-in wlan0 as the access point ...
-1 votes
1 answer
475 views

How to get the iptables logs when Rpi act as router between ETH1 and ETH0

I have setuped my RPI following the post Sharing the Pi's WiFi connection through the Ethernet port I want to be able to have to source ip, source port, source mac, dest ip, dest port logged by ...
1 vote
2 answers
346 views

Can’t ping or mtr ipv4 when ufw enabled

These don’t work when I have ufw enabled: ping 8.8.8.8 mtr -n 8.8.8.8 Ping just hangs and the mtr command immediately spits out the confusing message, mtr: Permission denied. IPv6 works fine: ping ...
1 vote
0 answers
203 views

How to configure RPi to work as wifi access point that uses a proxy?

I am attempting to use a Raspberry Pi Model B+ as a WiFi access point with the IP address of 192.168.0.1. This access point should redirect all HTTP and HTTPS traffic to a different machine with the ...
2 votes
2 answers
3k views

nat in the iptables is not recognized

I am trying to set up my Raspberry Pi as a Man In The Middle device to monitor devices on my home network. When I try to forward port 80 to port 8080 (to allow the webpage to be loaded on the device) ...
0 votes
0 answers
67 views

"IP forbidden" for Raspberry Pi, but not for laptop, after home IP change

The problem Recently my ISP gave my home a new IP address. I run a program on the Raspberry Pi that connects to some external APIs that have my home IP address whitelisted. After the IP change, a few ...
0 votes
0 answers
265 views

Vulnerability Scanner for IoT Devices using raspberry Pi

It's my final year project to develop a Vulnerability Scanner for IoT Devices, Here is the proposal of that project "The goal of this project is to put a vulnerability scanner on a Raspberry Pi ...
2 votes
1 answer
3k views

Multiple OpenVPN clients on Raspberry Pi

I have a cute Raspberry Pi 2 router running Raspbian Jessie. It connects to a VPN using OpenVPN on tun0 and redirects all the wireless (wlan0) traffic into tun0. This is done by using these iptables ...
1 vote
2 answers
6k views

How do I fix iptables -L error: operation not supported

I have all the newest software. Downloaded the official image yesterday. apt-get upgrade apt-get update rpi-update ..... rebooted, of course Does not help. root@raspberrypi:/home/pi# iptables --...
0 votes
0 answers
349 views

Installed WireGuard by PiVPN now PiHole DNS not responding. How to troubleshoot?

Recent fresh Raspbian installation August 2021. RP4, wired ethernet connection. pi@raspberrypi:~ $ cat /etc/debian_version 10.10 Summary of Steps: Installed PiHole: curl -sSL https://install.pi-...
0 votes
1 answer
194 views

Forward from Macvlan Bridge to tun0 Inside Namespace [closed]

Trying to isolate OpenVPN from host in a Namespace for only wireless clients. Set up a namespace, added a veth pipe to the host, and iptable forwarded it with eth0. The namespace VPN tested with pings ...
0 votes
1 answer
356 views

Pi4 Wireless AP: Can't Ping or Forward to eth0

Goal is for clients to connect through Pi4 AP to the WAN. The Pi4 is inside the LAN and wire connected to a router LAN port. After much effort a client can now connect to the Pi4 AP but cannot ping ...
2 votes
1 answer
554 views

How does 'iptables rules table' work with hotspot?

I'm using iptables rule for censorship. I created hotspot.When I try to connect website on raspberry with mother network, It's working. But I try on pc with hotspot my iptable rules isn't working. ...
0 votes
1 answer
180 views

Access website with port in access point

Here's my "starting position": I have a Raspberry Pi 3b+, which is already configured, and I wanted to convert it into an Access Point. I followed this tutorial: https://pimylifeup.com/...
1 vote
2 answers
497 views

Can't access other devices over network, only via router unit

I recently set up my Raspberry Pi to act as a router. All is working well when it comes to connected devices accessing the internet. The problem is that my computers don't seem to be allowed/capable ...
-1 votes
1 answer
3k views

Error installing iptables-persistent

I tried to install iptables-persistent without success. I checked the dependent packages and tried to install them manually but it is also not working. What I tried: sudo apt-get install iptables-...
0 votes
0 answers
2k views

pivpn install - fails to install iptables-persistent

Installation of pivpn fails due to missing iptables-persistent. Command (run as root) is curl -L https://install.pivpn.io | bash and result is % Total % Received % Xferd Average Speed Time ...
1 vote
0 answers
63 views

Can iptables be used to monitor a specific host and port without being a gateway or access point?

I have a Pi 3B+ that I want to use to monitor traffic forwarded from the router to another host (and a specific port) on the network. I am currently using the ethernet interface on the Pi to connect ...
0 votes
0 answers
39 views

What does the iptables related operation in step 11 and 7 of this tutorial do?

this tutorial: https://calap.co/blog/how-to-use-raspberry-pi-as-a-vpn-access-point--2018-10-27.html shows how to turn an raspberry pi into a VPN hotspot. I find the iptable configs at step 7 and 11 ...
4 votes
1 answer
5k views

is iptables broken or is it a kernel related issue?

I am trying to setup an access point on a raspberry pi 3 v1.2 using this repository create_ap with this Wifi adapter Bus 001 Device 005: ID 0bda:8178 Realtek Semiconductor Corp. RTL8192CU 802.11n ...
0 votes
1 answer
6k views

After I remove swapfile, I can't do anything! How can I revert this problem?

How can I extend the life of my SD card? I run 2 commands in sudo su mode, and restart my pi. What I run: # swapoff --all # apt-get remove dphys-swapfile # reboot After that, I notice that I can't ...
1 vote
1 answer
414 views

RaspberryPi VPN Router (eth0) works in Wired connections but not in Wireless ones

I have this following setup: Office Network: 192.168.9.x --> Subnet for all Wired Connections 192.168.9.1 --> Wired Gateway IP 192.168.10.x --> Subnet for all Wireless Connections 192....
0 votes
2 answers
613 views

Redirecting Traffic to local mqtt server

I am really confuse about how to redirect. I have 2 WLANs, one use to connect to the router(wln0) and one the I use as AP(wlan1). My aim is to redirect traffic from one client connected to the AP that ...
0 votes
0 answers
669 views

Raspberry Pi Router: NAT & iptables --to-destination is not recognized

I'm struggling to get NAT working on my Raspberry Pi as I intend. Without giving a lot of information, this is the issue I encounter $ sudo iptables -t nat -A PREROUTING -p tcp -i wlan0 --dport 2222 ...
3 votes
2 answers
747 views

How can I activate UFW on my Raspberry Pi 3 B without risking to lock myself out?

I want to activate UFW on my Raspberry Pi 3 B as I have used it previously on another machine and was quite content with that software. I have already downloaded UFW but I need to make sure that I ...
1 vote
0 answers
111 views

connecting a LAN device to openvpn through raspberry pi network bridge

hi i have recently set up a raspberry pi to be a network bridge for my router to my room as i thought it would be quicker to do than wait for the delivery of a plug in network adapter in this lock ...
1 vote
1 answer
571 views

Use the RPi3 with Libreelec to route between 2 networks

I'm using Libreelec on a RPi3 and I would like to use it to route between eth0 and wlan0 too. Network A - 192.168.0.0/24 with Internet access, connected to eth0, my network Network B - 192.168.1.0/24 ...
2 votes
2 answers
958 views

Issues with WiFi-WiFi Tor Proxy

Background I am currently trying to build a portable Tor Router on my Raspberry Pi 3. So I have my Pi 3 with two wireless interfaces, one is a station and the other is an AP. wlan0 (station) - ...
1 vote
1 answer
2k views

How to setup my Pi to proxy all LAN traffic through wifi?

I am quite new to linux and Raspberry Pi world and networking in general. I would like to add a VPN on my Pi, connect my XBOX to my Pi using LAN and have it act as a gateway of sorts so my XBOX is on ...
0 votes
0 answers
38 views

Cannot manage wlan0 from desktop

Good day all Pi folks! I have a Pi 3A (buster) which has the onboard Wifi (wlan1) configured as an access point. I installed a second Wifi USB TL-WN725N which comes up as wlan0 and is the outside nat'...
-1 votes
1 answer
389 views

Using the Raspberry Pi and OpenVPN

I have had a burning issue with my VPN setup and I am hoping someone will be able to help, or advise. So I currently have a DD-WRT router with an OpenVPN client setup serving my devices. However the ...
2 votes
1 answer
397 views

AP Bridge VPN IPTABLES rules needed

I have set up an access point with a bridge (bridge: I want to be able to access all other devices within my network) using this How-To (Setting up a Raspberry Pi as an access point - the easy way). ...
8 votes
1 answer
11k views

Problem with iptables on buster - neither legacy or nft work

I recently installed buster on a Pi 3 Model B. Trying to setup a von (using pivpn) I realised that iptables is not working. I've learned that there's legacy mode and nft. Here's part of the output ...
1 vote
0 answers
366 views

Using Hamachi messes up with the Pi's networking

I have a Raspberry Pi 3B+ running Raspbian Stretch with no problems since over a year. I recently tried install Hamachi from the official LogMeIn website, and connected it to my LogMeIn Hamachi ...
4 votes
1 answer
6k views

VPN Passthrough two ethernet interface

I'm a quite new in the network my internet acces have a proxy so to by-pass it I use a VPN hosted on my VPS. I use the OpenVPN Client software for all my devices. (Windows, Android, Linux) I got a ...
1 vote
0 answers
235 views

TOR Relay, Routing not working Properly

So I have been trying for a while now using this guide https://pimylifeup.com/raspberry-pi-tor-access-point/ . About 2 years ago I was able to do this, but my SD card corrupted and I had to do it ...
1 vote
1 answer
38 views

Correctly Route 2 Newtorks

I am currently running Pidora and I have configured it so that dhcpd hands out an IP address to devices connected via Ethernet on a network of 192.168.2.1 whilst it (the Pi) obtains a static IP from ...
3 votes
1 answer
707 views

OnionPi - No internet connection after adding Iptables rules

I need some help or advices since I've not know what could I do to fix this issue. I've built an onion pi following the adafruit tutorial. This basicly is a wifi hotspot that routes all traffic ...
1 vote
1 answer
250 views

Need help for iptables/filter

Setup: RPi connected to router using ethernet on subnet 192.168.0.0/24 which is also an access point access on subnet 192.168.43.0/24 So basically devices will connect to my Rpi for VPN traffic I ...
1 vote
1 answer
237 views

How to connect a ethernet device(having its own static I.p and netmask) wirelessly by my laptop?

I have a device which is used to monitor analog sensor data(Micron optics sm130 ) with ethernet port available. It has Static IP as 10.0.0.126 Netmask as 255.255.255.0 DHCP server disabled Its ...
-2 votes
1 answer
96 views

iptables blocking access to a service (Cloud9)

I want to create a Cloud9 server using a raspberry pi. I download the repository and it ran just fine in the port 8181 as it shows below. I could even access the panel from the Raspberry using ...
1 vote
1 answer
560 views

Help in setup for RPi3 for internet connection sharing to eth0 and wlan0 (from eth1)

I have already setup the RPi3 for share my internet connection (from eth1 usb ethernet dongle) to my eth0 (Rpi3 internal ethernet port). The "ASCII diagram" is this: Internet -> Fiber Router (192....
1 vote
0 answers
179 views

iptables doesn't recognise REDIRECT as target

Trying to redirect traffic using iptables v1.6 and the following line: iptables -t nat -A PREROUTING -p udp --dport 67 -j REDIRECT --to-port 6767 which results in the following output: iptables: No ...
0 votes
0 answers
360 views

Cannot connect Deluge Thin Client to RPie Deluge Server

I'm trying to setup my RPi 3 (buster) with a deluge server and a VPN (Private Internet Access) I have followed theses guides https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=223589 https:/...
1 vote
0 answers
719 views

Raspberry Pi Tor router without WLAN

I have Raspberry Pi 1 model B+ with Raspbian Wheezy. I bought a USB2-Ethernet adapter and decided to create hardware Tor routing. What I mean by hardware routing: The Raspberry Pi will be in middle ...