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I designed the following topology: Client A -> Server B -> Server C Server C: wireguard server that NATs packets from its clients (in this case just B) before sending them to the Internet. Its ...
Maf's user avatar
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i have a single server which two VM(ubuntu) configured as ubuntu-edge(with frr module for routing - wan side) and ubuntu-fw(for lan side), between these machines there is a virtual internal interface. ...
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I've enabled ip forwarding on a RHEL 7.9 machine, but it's not forwarding any icmp requests. I've set the ip_forward flag cat /proc/sys/net/ipv4/ip_forward 1 /etc/sysctl.conf has been edited to ...
Thundercleez's user avatar
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Context In my Debian Linux infrastructure, I manage several network interfaces with specific roles. Interface Role Subnet Description eth0 Public connection 192.0.2.0/24 Used for external public ...
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I have server A which has a 4-port Network Interface Card, and it is configured to reach the internet via its eth0 where DNS and a gateway and a proxy is specified. I have an identical server B with ...
ron's user avatar
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On my Linux machine, I have a UDP server listening on IP 192.168.1.5 port 44123 and an application that sends UDP packets to other devices on the same network, in particular to devices with IP 192.168....
Jerry Pylarinos's user avatar
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I have a Raspberry Pi with an ethernet connection on the end0 interface to the 10.15.16.0/20 network. It has a static IP address on this network at 10.20.30.15. The Pi is also connected to my ...
Ananth's user avatar
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I have two LANs connected with a VPN: LAN1:192.168.0.0/24 <=> VPN:192.168.2.0/24 <=> LAN2:192.168.10.0/24 The two routers (one on each side of VPN) are running on Debian Linux and IPv4 ...
grrosminet's user avatar
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In most cases this is harmless message. In this case, this SSH connection exists solely to forward TCP ports (and it uses a dedicated key which is restricted to only be able to do this), and it should ...
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I have hostapd running on two wireless devices in isolated and bridged mode: wlp1s0 is behind the bridge wan, and wlp5s0 is behind the bridge iot. The exact configuration for each bridge is the one ...
Quentin's user avatar
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I want to ask about network options on virt-manager. I used to have the options shown in the given picture https://i.sstatic.net/P4SYR.jpg host device eth0 : macvtap host device wlan0 : macvtap and I ...
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i am trying to do something , but i cant get it to work After at least 4-5 hours of research and trying , its time for help I want to connect to a second remote machine trough a primary remote machine ...
Antoine Lanaud's user avatar
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I have a DigitalOcean droplet into which I'm attempting to clone a repo from Github. This works fine on my local machine, and I've been following the guide from Github here: https://docs.github.com/en/...
Adaddinsane's user avatar
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I'm trying to use ssh -Y/X ManjaroHost from my Mac, but get "X11 Forwarding request failed". I've searched for the solution for two weeks, and have tried many methods suggested by similar ...
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According to https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt conf/all/* is special, changes the settings for all interfaces forwarding - BOOLEAN Enable IP forwarding on this ...
Ahmed Gasanov's user avatar
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I am trying to set up a server that can on one hand connect to an OpenVPN server (Server 1) as client, and act as a OpenVPN server itself (Server 2). The server (server 2) would then route all the ...
tripleA's user avatar
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I'm familiar with how to set IP forwarding between two interfaces, and it always worked. Now I have a different scenario where I want to set IP forwarding from a local network bridge to an output ...
Mellowcandle's user avatar
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I have crawled the internet, and tried some config, but so far, i am stucked, so i would need a little help if someone has a better experience than me on this. :) I got a server,server1, behind a ...
Yann's user avatar
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Hi I am quite struggling to find a good solution to my problem. I have to forward http/https requests from my (Linux) server to 2 different proxy based on the destination URL. I've tried different ...
Zioalex's user avatar
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Some background information first before my question, I am curious as to what happens behind the scenes after you have purchased a domain name and then setup a forwarding email address from the newly ...
AeroMaxx's user avatar
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my case is likely following case: SSH client(192.168.0.11) -> public cloud VM with SSH server and setup port forwarding (139.90.90.90)(CentOS7.9)-> one internal SSH server(10.24.24.24)(CentOS 7....
yixuan's user avatar
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I have a debian small server setup with bind9 and dnscrypt both on the same machine. Bind9 runs on port 53, dnscrypt on 5000. The regular bind9 server performs some checks then forward the requests to ...
user3450548's user avatar
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I have 3 Linux VMs connected like this: / server1 \ | ens19 2001:1::2 | \ / | / \ | ens19 2001:1::1 | | ...
Chris's user avatar
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I wanted to take my existing internal DNS Bind servers and add some RPZ security. Previously I had split DNS with my internal view set to forward 3 specific domains to my offices internal DNS servers. ...
Nick Ellson's user avatar
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1 vote
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I have two machines in a host-only network. One is a client and the other one is a webserver. I want to forward all HTTP traffic from client to web server over a proxy on port 8080. I tried it with: ...
Marcel's user avatar
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1 answer
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i hope someone could help me because i can't get any further: I have the follwing Setup: System 1: PC Windows (192.168.240.2) System 2: PC Ubuntu (192.168.240.3) On the Ubuntu System i opened a ssh ...
sangul's user avatar
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26 votes
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Suppose I have this situation where I wrote a program to poison the ARP cache of 2 devices (let's say A and B), both in the local network to successfully able to MITM from device M. The program runs ...
InvisibleWolf's user avatar
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Preamble We have a test setup where several components are connected to their own network. This network has the the following address: 172.25.1.0/24. Most, if not all, of the components have static IP ...
SimonC's user avatar
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This is the scenario It is created with Vagrant and configured with Ansible, but the specific problem I'm going to ask about here is why IP forwarding is not working when it should be working. On the ...
Adrián Jaramillo's user avatar
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1 answer
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I have an SBC running Arch Linux that I use as a VPN server (as it is the only device having a globally accessed IP address not NATed by ISPs) to connect three different networks. These are 192.168.0....
z0mb1e_kgd's user avatar
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I'm building a captive portal (yeah, just-another ;) ) and now I'm trying to handle the core feature, the iptables rules.  Based on ipset I have a list of valid mac-addresses with name allow-mac.  So ...
Volker's user avatar
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I'm a happy user of a postfix mail server. But, every now and than an outgoing mail is blocked by the receiving system. Be it that that system considers the mail as spam, or for some other reason. I ...
pe1aqp's user avatar
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1 answer
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I installed Debian 10 in VMWare. This Debian machine has to operate as gateway/router machine. To enable ip forwarding between my LAN and WAN interface, I edited the value with nano in /proc/sys/net/...
kzpm's user avatar
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I have two machines on 2 different networks which are interconnected. First network: 10.0.0.0/24 Second network: 10.0.1.0/24 The first network is running an OpenVPN under 10.0.0.10 with ...
Yaron's user avatar
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0 answers
213 views

I use my laptop's hotspot with Ubuntu Linux for internet on my phone and entertainment devices. When I install the Linux Firewall iptables (ip forwarding enabled) by inputting in terminal: sudo apt-...
ThatGuy's user avatar
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I am trying to display Rstudio on my laptop (where I have Ubuntu 18.04.5 LTS) using X11 forwarding with ssh to connect to my Imac at home. I set up all the files (ssh_config and sshd_config) on my ...
Riccardo Delli's user avatar
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7 votes
2 answers
4k views

I'm trying to follow these guides and answers https://wiki.gnupg.org/AgentForwarding https://superuser.com/questions/161973/how-can-i-forward-a-gpg-key-via-ssh-agent https://gist.github.com/...
oarfish's user avatar
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For example, how do I forward audio from a Ubuntu guest (in Hyper-V) to the Hyper-V host, considering Hyper-V doesn't virtualize audio hardware? There is no pulse client for Windows 10 as far as I ...
Jonathan Dahlin's user avatar
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1 vote
1 answer
4k views

How can I forward a local port to a remote host/port? I have tried using: sudo iptables -t nat -A PREROUTING -p tcp --dport <PORT> -j DNAT --to-destination <DESTINATION_SERVER>:<...
mjdarking's user avatar
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1 vote
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So I'm looking for a simple solution in the form of a stand-alone middleman service to run on Ubuntu on a headless Raspberry Pi, listen on port 80 and forward the traffic from that, to and from an ...
Zinc's user avatar
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0 answers
141 views

I've got the following command in my iptable: -A FORWARD -o enp0s3 -j ACCEPT That somebody doesn't like, because after 2 reboots, it's gone from the iptable... I've got iptables-persistent installed, ...
Adam Larsson's user avatar
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1 vote
1 answer
530 views

I'm running a home server with FreeBSD 12.1 with openvpn. The openvpn runs strictly on the server - the rest of my home network is non-openvpn. I'm a noob with webservers, and am fooling around with ...
Jim's user avatar
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1 vote
1 answer
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I am looking to x11 forwarding example in libssh2 source (example/x11.c). In the function x11_send_receive I see this code: rc = select(sock + 1, &set, NULL, NULL, &timeval_out); if(rc > 0) ...
lucky62's user avatar
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2 votes
2 answers
4k views

Goal Set up NordVPN on my Raspberry Pi and use it as a gateway. Current set-up Raspberry Pi2 running Arch ARM, connected to my router via ethernet cable NordVPN account nordvpn installed on my Rpi ...
Alessandro Romano's user avatar
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2 votes
1 answer
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I have a similar question linked over to ServerFault, but after further working on the problem, I believe I've refined the problem to a Linux route table question. Background: AWS released their ...
DavisTasar's user avatar
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I have an application with very high performance requirements and the following job: There is incoming UDP traffic on port 1234. The packets have as fast as possible to be sent to hosts H1, H2, ... Hn ...
Kevin Meier's user avatar
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968 views

I have a VM that has two IPs. Let's say 1.2.3.4 and 4.3.2.1. If i do "ip a", it shows me 1.2.3.4 as first one and 4.3.2.1 as second: 2: venet0: <BROADCAST,POINTOPOINT,NOARP,UP,LOWER_UP>...
smaxx1337's user avatar
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I'm trying to capture packets sent from my phone using my raspberry pi, basically a MITM kind of thing. I have changed my phone's wireless settings to use the raspberry pi's ip address as the router ...
AndyF's user avatar
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1 answer
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I have two raspis and connect from one to the other using SSH and X11 forwarding, ssh pi@[pi's IP] -X -v. Displaying the remote GUI using X11 forwarding works fine for many applications. However, for ...
SeBASStian's user avatar
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1 answer
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What does * mean in the below ssh command? ssh -R *:1993:localhost:22 [email protected] The * means 23.105.207.175? And are there different meanings for the below three expressions? expression1: ...
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