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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Need help for iptables/filter

Setup: RPi connected to router using ethernet on subnet 192.168.0.0 RPi access point on subnet 192.168.43.0 I am using the nordvpn application and when I connect to the vpn it applies a filter on ...
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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 ...
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Remote access lags on 3B+ when firewall enabled

I'm having some weird problems with SSH and VNC on a 3B+. I've got basic firewall rules on the Pi to allow that traffic through, but I get major lag with them. I'm talking 2 minute delays. If I ...
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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 ...
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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....
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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:/...
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PiVPN client cant connect to local network

I've managed to setup PiVPN on a Raspberry Pi 3+ and I can connect from the outside, I even have Internet access, but I don't have access to the local network. These VLANs are created under my USG ...
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Log input traffic using iptables

Is it possible to log input traffic coming to wired Ethernet port using iptables, without syslog running? I want to know about appearance of particular MAC address WiFi node in range of my home WiFi ...
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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 ...
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How do I forward port 19132 from a subnet on eth0 to wlan0?

So I currently have a Minecraft server running on a computer in my house and would like to port forward it. However, the computer is in a separate room to the router and doesn't have WiFi. In order to ...
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Pi is listening but nothing except ssh can connect

Ok, so I'm stumped. I have a new Raspbian install on a Model B Rev 2 and I can ssh using the IP Address just fine, but I can't connect on any other port outside the pi. Some details: pi@dogwood:~ $ ...
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How to allow access from OpenVPN set on eth0 to wlan0

So I have the following configuration: +---------------------+ +----------------------------------+ | 10.10.10.* | | 192.168.100.*...
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How to connect a ethernet device(having its own static I.p and netmask) via internet by my laptop?

I have a device which is used to monitor analog sensor data(Micron optics sm130 ) with ethernet port available. Its works fine if If I connect it with my laptop using ethernet cable and by configuring ...
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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 ...
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Debian gateway server with webmin suddenly unable to communicate with anything

I have a Raspberry pi running Raspbian Lite and webmin that is been serving as my home network gateway (and has been for some time without issue). Tonight I was attempting to add some port forwarding ...
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Raspberry Pi DHCP Server: clients not getting IP addresses

I am relatively new to networking, so please bear with me. For a purely educational project, I've set up a network where the Raspberry Pi 3 running Raspbian Stretch is to function both as a router and ...
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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: ...
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How can I gain internet access after a valid login? [duplicate]

I set up my iptables on my raspberry pi to redirect ALL traffic to localhost where my landing page is hosted, so that people on my AP can't access internet without logging in(correctly) first. On the ...
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908 views

How can I redirect HTTP requests to my captive portal/webserver using iptables

I'm working on a project where we need to use the RPi as a Wifi access point, which I got to work. I can get on the internet through the RPi and can also connect my Apache webserver (which should be ...
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177 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 ...
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196 views

Raspberry Pi not blocking sites based on iptables rules

I am working on a network security project that can inspect network traffic before forwarding and accepting traffic from the internet. I have a R-Pi B+ Model running raspbian stretch lite where the ...
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Raspberry Pi Wifi Repeater – Block Ads

I configured my raspberry pi as a wireless repeater (using hostapd and dnsmasq). Now I wonder how I could use it to block known ad-servers? What would be the best way? Using iptables? Or setting up ...
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167 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....
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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. ...
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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 ...
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297 views

Iptables and reverse ssh tunnel to connect with IP camera

I need to be able to access an IP camera that is on the same local network as a raspberry. I do not have access from the outside because it is a mobile data network that does not give me public IP or ...
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68 views

Forward port (80) to another local network IP

I have a Rpi, which is behind NAT (4G carrier), but I've managed to expose ports to be accessible from the internet using https://www.remot3.it. I want to use the Rpi as proxy, so I can access a IP ...
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867 views

Can't ping certain devices on my network [closed]

I've got a rather odd problem. The Raspberry Pi is connected fine to the internet i.e. I can ping google.com and browse the web without any problem. However, the problem for me is that I am unable to ...
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130 views

Make a program to run on a specific network interface?

Short question: How can you make only one specific program run off wlan0 and leave everything else to run off the ethernet? Long question: I've been using my Raspberry Pi for a while now and I love ...
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357 views

Raspbian Stretch iptables: Can't redirect all requests to localhost on pi

I have a private hotspot running on the raspberry based on RASPAP, which is working perfectly. Now I wish to automatically direct all the users who connect to this wifi towards a locally hosted ...
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371 views

Faking an internet connection on an access point

I'm working on a project where a Raspberry Pi creates its own access point running a Flask server, but will not have an internet connection. I set up the iptables so that when the user tries to ...
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Edit iptables to open a port the safest and easiest way (nano?)

I have this web application called HaasBot (running on Mono 5) which I want to run on my Raspberry Pi 3 with Raspbian Stretch Lite (Terminal only!) as a server internally in my network only. Using SSH ...
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How to redirect IP network to specific interface

I'm developping an app for Android Things DP4 on Rpi3. I need my Rpi to send packets with destination IP in the network 10.110.2.0 with the interface wlan0 and packets with destination IP in the ...
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Windows Ping Problem

I seem to be having a strange problem with my Raspberry Pi - I can ssh to the Pi, but the Pi cannot ping the computer I am ssh'ing from (Windows firewall allows ICMP packets). I have the Pi configured ...
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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 ...
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302 views

Prevent traffic from specific IP from routing through OpenVPN

I am using a Raspberry Pi 3 as a WiFi access point, which routes all traffic through the tun0 interface/OpenVPN. However, I'd like to be able to route traffic from a device with the IP 172.24.1.126 on ...
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Give fix bandwidth to all ip address for internet, but exclude local apache server

I have installed chilli, apache2, hostapd in raspberry pi. User can connect hostspot created by hostapd. Captive portal will open asking id password(because of chilli). Once user sign in, user ...
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321 views

How to configure RPI as access point?

All my life, I've been using Adafruit tutorial on How to set PRI as access point, but in the latest release the /etc/network/interfaces file looks diffrent. After following tutorial and reboot, RPI ...
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cannot forward from wlan interface to another wlan interface

I have two wlan interfaces: wlan0 wlan1. wlan0 is an AP managed by hostapd, where as wlan1 is a normal wifi interface, which is connected to my home router via wpa_supplicant. Additionally I have my ...
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163 views

Can only SSH using Wi-Fi connection not Ethernet

I have a Pi connected to both Wi-Fi and a cellular gateway but can only SSH into it from the Wi-Fi IP address. Port forwarding is, as far as I can tell, correctly set up on the cellular gateway. I ...
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Raspberry Pi 3 WiFi to WiFi Access Point not forwarding traffic to Internet

I followed this guide https://pimylifeup.com/raspberry-pi-wireless-access-point/ on how to setup an Ethernet to WiFi access point using the built in RPi WiFi adapter successfully. I connected my phone ...
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How to open a port?

I need to open the 25 TCP port on my Raspberry Pi 3, I watched videos on the internet (iptables) nothing works, if you have a solution, using iptables or another method, that would be great. If you ...
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FTP connection broken after configuring iptables on Raspbian

So I managed to get a configuration of iptables that suits my needs, primarily based on 2+ hours of research and reading similar Stack Exchange and forum posts. However, this seems to have broken my ...
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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 ...
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Routing network through 3 interfaces

I got a Raspberry Pi 3 which I haven't used in a while, and have decided to boot it up with its built-in wifi card as its own Hotspot, and the official Raspberry Pi Wifi Dongle as an interface to my ...
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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-...
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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) - ...
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Steps required to protect home network from Raspberry PI infected with malware or hacked? [duplicate]

I'm not to savvy with network security so I hope someone can help me. My question is reformulated here to be more precise, something that was requested by other members in the previous question. I ...
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Only allow ssh from 192.168.XXX.XXX

How can I only allow ssh access from the local network (192.168.X.X) and drop all requests from the internet? What is the best option? adding an iptables rule or modifying the /etc/hosts.allow ?
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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 ...