Questions tagged [forwarding]

Redirect a port to another one, used to access a computer from behind a firewall.

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Proxmox, iptables connection refused on port 443 from different nodes if forward to LoadBalancer

having some problems with port forwarding on dedicated machine running Proxmox. I have create an LXC-Container for LoadBalancing and forward all incomming request on port 80 and 443 to it. If I am ...
0 votes
0 answers
32 views

kvm forward port from Host to guest VM bridge mode

I have a server Ubuntu 22.04 on cloud (VPS) with one external IP (public) address (19.162.31.26), and the internal IP (private) address (192.168.122.1). On that server I use libvirt (Virtual Machine ...
0 votes
1 answer
9k views

Access web server on VPN client through VPN server public IP

I am trying to access a web server running on a PC, that is behind a firewall not managed by me, using a VPN connection (openvpn). Basically, I want to use the public ip of my VPN server for accessing ...
0 votes
1 answer
10k views

plink.exe remote port forwarding to local machine for dynamic port forwarding

I have been trying since 2 days to do the following: I have a windows machine, let's call it A, and a Linux machine called B. There is a firewall between A and B. I want to connect remotely from the ...
2 votes
1 answer
15k views

Transparent Ethernet over GRE not forwarding traffic

I am running on Linux 2.6.30.9 and have been trying to setup a transparent ethernet over GRE tunnel. The network topology used is as follows: I want to bridge PC1 and PC2 using Transparent Ethernet ...
2 votes
1 answer
10k views

2-way SSL with apache forward proxy

I'm working to set up Apache as a forward proxy with a client that uses 2-way SSL. The basic flow is myApplication --via http--> Apache proxy --via 2 way SSL--> client. After setting everything up, ...
0 votes
1 answer
393 views

How to forward emails from a domain to 2 different servers?

I am not sure the title describes my problem properly, so let me explain. I have a domain called example.com. I have currently set it up for email services from Microsoft Live domains. I have done ...
0 votes
1 answer
89 views

How to redirect an IP and port that is being listened to using iptables?

I have a server with two external IPv4 addresses. One address is essentially unused in that it doesn't appear in any DNS and I haven't employed it for anything. I want to use port 80 on it now, but ...
0 votes
0 answers
202 views

Simple MySQL tunnel without SSL or SSH?

What I have I have a MySQL database that allows whitelisting only 2 individual IP addresses. No other access to that server except a MySQL username and password. What I need I need to connect Google ...
3 votes
3 answers
20k views

How to route UDP traffic from one public IP (linux) to another public IP(Windows)

I want to prevent direct access of my Windows Machine and want to expose some programs running on it via my Linux Machine (which again is accessible by a Public IP). Is there a way where-in I can ...
-1 votes
1 answer
229 views

OpenVPN - Server cannot access devices in client's LAN

I have an OpenVPN server (10.1.0.0, 255.255.255.0 VPN subnet) and a client with a local subnet of 192.168.1.0 255.255.255.0. Server VPN IP is: 10.1.0.1 Client VPN IP is: 10.1.0.2 Server local IP: 172....
0 votes
1 answer
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How can I Forward traffic through UBUNTU?

I have a Ubuntu Desktop client and two Ubuntu server. Ubuntu servers are two separate VPS in Germany and Netherland. I need to route SSH traffic through Germany VPS, for example; When I run ssh root@...
-4 votes
2 answers
2k views

Config to allow SQL Server to be connected through CloudFlare?

I have already known the risk of exposing SQL Server database on the Internet, but please look at my situation: I have two instances of SQL Server: production (default instance SQLEXPRESS) and dev (...
1 vote
1 answer
783 views

Bind9 forward with forwarders for missign A records

I have a local DNS server running Debian and BIND 9.10.3 Currently it is configured with two forwarders 8.8.8.8 and 8.8.4.4 in named.conf.options I have created a "dk" zone zone "dk" { type ...
0 votes
0 answers
66 views

A command to troubleshoot UDP traffic forwarding issues?

I've been setting up a UDP forwarding configuration to a load balancer in a private network in Azure with a colleague. The attempted setup was something like this: There's the actual target UDP ...
0 votes
1 answer
144 views

Iptables duplicate/Mirror incoming UDP traffic from HOST1 to an external HOST2

I need an advice about the following scenario: IoT devices are sending UDP packets to a 18.04 Ubuntu server environment (HOST1) on port 1234. HOST1 processes the UDP packets as per the internal ...
1 vote
2 answers
1k views

Proxmox VE Dedicated Server OVH - Config Issues In Network Setup With 1 Public IP

Problem: (No Internet & No DHCP) I cannot seem to get my VM's to connect to the internet nor am I able to setup a DHCP server to automatically assign IPs to them. Introduction/PSA for dupes: I've ...
11 votes
2 answers
3k views

Forwarding traffic from TUN device (C++ backend) to the default gateway

The following problem is just a piece of the bigger solution I have a problem with. All other elements seem working so far, so I'll try to describe very small piece which I have problem with. I've ...
2 votes
1 answer
5k views

Port Forward - KVM host forward port 23 to port 22 of a guest running an ssh service

I have a KVM server (host) with multiple virtual machines (guests). My goal is my host forward port 23 to port 22 of a guest running an ssh service. Command example... ssh root@[HOST_IP] -p 23 ...
1 vote
0 answers
505 views

SSH proxy like NGINX Proxy Manager forward ssh session to correct server

for my webserver i have one public IP which is determining on one server - the nginx proxy manager is handling the connection & forwarding to the correct server which only has an public ip. Is ...
0 votes
1 answer
307 views

SSH Ethernet Forwarding Does Not Seem to be Working

I have Ubuntu 22.04 on both the client and server. I have set PermitTunnel yes in sshd_config in both the client (I might not need it on the client) and the server. I have also set Tunnel yes and ...
0 votes
0 answers
391 views

Use squid to forward http(s) requests based on domainname

I have installed 5 LXC containers in Proxmox. Each container has a Apache2 webserver up and running inside, pointing to a registered domain. So: container1 points to example1.com and has a local ip ...
0 votes
1 answer
1k views

share two network interfaces on linux

I have a Linux PC (ubuntu 22.04) with a network layout as below: Internet <-> Router <-> PC <-> edge device <-> Switch <-> APs <-> devices And with two Lan ...
0 votes
1 answer
296 views

How to forward traffic through Linux box except requests to the box itself?

I have an Ubuntu box with IP forwarding enabled and a very simple iptables configuration to allow all packets from within the LAN to be forwarded: echo 1 > /proc/sys/net/ipv4/ip_forward /sbin/...
39 votes
5 answers
79k views

Forward the root domain to the www subdomain using DNS records

I have www.mydomain.com pointed at an Azure Website. www.mydomain.com --- CNAME --- mydomain.azurewebsites.net When I visit www.mydomain.com, everything works fine. This is good. Problem is, ...
0 votes
0 answers
105 views

How can I allow all the subpaths after a domain in nginx proxy

Below is my configuration of nginx proxy . I have to allow all the subpaths after example.com like it should allow https://example.com/test , https://example.com/vaid. These subpath are already ...
0 votes
0 answers
109 views

Internet relay postfix with virtual alias and .forward

In a relay postfix for a domain, I am trying to configure so that each user indicates the e-mail destination address he wants in the .forward but as virtual_alias_maps is configured, it always takes ...
1 vote
2 answers
1k views

How to disable an Exchange 2016 mailbox and forward anything sent to it

fyi i would consider myself an exchange-noobie Ok, the scenario is: User left the company, but still gets a lot of mails sent to their mailbox. The AD User-password has been changed so they no longer ...
5 votes
1 answer
4k views

Postfix as email forwarder to gmail, SPF problems

I'm trying to configure postfix as forwarder to Gmail. I've successfully configured the virtual aliases for the domains I'm hosting and that I want to redirect, but the Gmail Sender Policy Framework (...
0 votes
0 answers
125 views

NGINX forwarding by 3rd level domain name

I have two local web apps which should be accessible from external network, but only one external IP. Both web apps use 443 port which can't be changed. So the task is to configure nginx in the way so ...
7 votes
3 answers
36k views

iptables redirect local connections to remote system / port

I am trying to use SSH to port forward windows machines local port 3389 to a redhat server on some arbitrary port (in the unprivileged region) I have protected behind a firewall, then forward the ...
2 votes
1 answer
4k views

Manual Multicast forwarding with Linux router

I have a Linux router (Ubuntu). It is working well with unicast but with multicast routing/forwarding I have some trouble. The problem is that my hosts do not send igmp/mld messages thus the router ...
4 votes
1 answer
857 views

How to route IPv6 to the external interface?

I have purchased a VPS from IONOS. While they provide an IPv6 range 2a00:xxxx:xxxx:67::/64, they don't route it to the VPS itself, which is quite odd. I wonder how I can achieve that. I have only 254 ...
78 votes
11 answers
98k views

Why is ssh agent forwarding not working?

In my own computer, running MacOSX, I have this in ~/.ssh/config Host * ForwardAgent yes Host b1 ForwardAgent yes b1 is a virtual machine running Ubuntu 12.04. I ssh to it like this: ssh pupeno@b1 ...
0 votes
1 answer
296 views

Can I tunnel all ports from remote server to 127.0.0.2 (for example), so work with it like with localhost

I have a remote server. I started on remote server app that listen localhost only. I want to tunnel this server to local ip like 127.0.0.2 and access this app through like I on remote server. I need ...
9 votes
3 answers
13k views

Forward mDns from one subnet to another?

Is there an ipfw rule that can easily forward mDns packets from one subnet to another? I have a Snow Leopard Server machine serving as the gateway between the two subnets and would like for machines ...
0 votes
1 answer
282 views

Is the outgoing connection from a OpenVPN client to a LAN behind an OpenVPN server forwarded by the server kernel?

I've observed a somewhat strange behavior that I can't quite understand. So I set up an OpenVPN connection as shown in the graphic below. (It's a TUN and client-to-client setup). My thoughts are ...
0 votes
1 answer
457 views

Is it possible to redirect (not forward) email in procmail?

I am using the following rule to forward email in .procmailrc # in .procmailrc * ^Subject.*something ! [email protected] The filtering and forwarding part works as intended. However, the email ...
0 votes
0 answers
43 views

Iptables Traffic forward

Would you please help me . I have a 2 vps (Ubuntu) I want to forward all traffic from one vps(1.1.1.1) to another (2.2.2.2) vps except ssh port on A vps(1.1.1.1) A server is 1.1.1.1 B server is 2.2.2....
-1 votes
1 answer
249 views

Access Internal IP by Sub-domains

I'm trying to access applications with internal IPs via subdomains from outside. From my research, when it comes to http running apache, it seems feasible with a DNS server inside. How to point sub-...
0 votes
1 answer
910 views

Forward UDP broadcasts to another IP

I receive UDP broadcast packets on wlan0 on my Raspberry Pi which I'd like to forward to my desktop for analysis via eth0. I'm running a modified WiFi firmware on a raspberrypi which sends UDP packets ...
4 votes
1 answer
2k views

Forward IP packets to tunnel device

I have created an tunnel device using ip tuntap add dev tun0 mode tun user 0 group 0 I then assign it an ip address 192.168.0.1/22 ifconfig tun0 192.168.0.1 netmask 255.255.252.0 On my ethernet ...
1 vote
1 answer
2k views

SSH ForwardAgent is receiving "Connection closed by remote host"

I'm trying to connect to a remote server using SSH ForwardAgent but I'm facing all the time the same issue : ssh_exchange_identification: Connection closed by remote host I've setup my ~/.ssh/config ...
1 vote
1 answer
101 views

how to do remote access in virtualbox (configure as bridge) with ipv6

I installed Ubuntu Server 22.04 in a VirtualBox set up as Bridge. ipv4: 192.168.55.226 ipv6: 2804:389:a09c:d31a:a00:27ff:feca:3cad How do I remote access my virtualBox by ipv6? 2804:389:a09c:d31a:...
0 votes
2 answers
3k views

Nginx forward request to URL

I am trying to forward a http request to a server specify in the url of the request, but I always get a 404 as result. This is my config: worker_processes 2; daemon off; error_log /var/log/nginx....
2 votes
1 answer
122 views

Ping device connected to host having LAN access

I've been playing back and forth routing games for a couple of days. As it is quite hard to describe with words I made a diagram below: What I want to achieve is being able to ping Rpi 4B from Rpi 3B ...
1 vote
1 answer
402 views

Routing HTTP/HTTPS traffic from one Linux server to another Linux server

The DNS for the domain.com is pointing at Server1 (it has a public ip address). The webserver is running on Server 2 (no public IP address, but connected to Server1 via OVPN). Is it possible to route ...
1 vote
0 answers
3k views

WireGuard slow routing?

I've got a setup as depicted in the picture. The problem is catastrophic speed when using routing. All WireGuard interfaces MTU = 1420. (1), (2) are debian servers. (3) is windows machine. The only ...
2 votes
1 answer
2k views

How to configure iptables rules for connecting 2 eth to the net (forwarding & masquerading)

need some help on configuring iptables rule for forwarding and masquerading Given I have these configuration: switch1 ---- (eth1) ----- router ---- (eth2) ----- switch2      ...
0 votes
0 answers
594 views

How to set up a secure forward proxy for a TCP port that is not HTTP or HTTPS?

I have a Mac Workstation, and I also have an EC2 instance (running Ubuntu Jammy) that we'll call my Proxy Box. I want my Mac Workstation to communicate out to the internet through my Proxy Box. ...

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