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How to create UDP proxy using iptables

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http://serverfault.com – I have a server running UDP server on port 50000. This server receives updates from clients, and pings back the clients every 5 seconds to the socket they were connected from. Now I want to redirect all the traffic to and from this UDP server via another server. Basically I want to setup a transparent proxy in front of this server. The reason is that I want to be able to easily control which server handles the UDP traffic, without the need to change DNS settings. At first I tried usingn socat to create this proxy: socat UDP-LISTEN:50000,fork UDP:myserver:50000 But this seems to work well (HowTos)

grtyyu's picture
Submitted by grtyyu on 03/06/2012 – Made popular on 03/06/2012

Stories similar to How to create UDP proxy using iptables

i would like to setup two transparent proxy server that use Ubuntu Server and Squid as transparent proxy. My idea is to synchronize the cache between Proxy 1 and proxy 2. so both Proxy server will have same cache inside them. I wish to use Rsync that is an open source utility that provides fast incremental file transfer.

I will be awarding a +100 bounty to the correct answer once it is available in 48 hours

Is there a way to redirect traffic set to go out of the server to another IP, back to the server on localhost (preferably as if it was coming from the original destination)?

I'd basically like to be able to set up my own software that listens on say, port 80, and receives traffic that was sent to say, 1.2.3.4

SOCKet Secure (SOCKS) is an Internet protocol that routes network packets between a client and server through a proxy server. SOCKS5 additionally provides authentication so only authorized users may access a server. Practically, a SOCKS server will proxy TCP connections to an arbitrary IP address as well as providing a means for UDP packets to be forwarded.

socat udp client server 7 weeks 6 days ago

Following http://jdimpson.livejournal.com/6812.html, I've socat UDP client-server set as following:

socat as a UDP server on port 11111.

socat STDIO UDP-LISTEN:11111

and then as a UDP client.

socat - UDP:localhost:11111

Now the question is that when I write from client, server gets the data via UDP. But UDP is unidirectional.

Here's what I've got setup:

Windows Service Account with internet access A .NET application which allows setting the proxy settings

Host Port Username Password

When running this application the proxy server logs are showing that the credentials are being passed to the proxy server and the proxy server is allowing the traffic.

Hello,

I'm looking for a solution to route my SSH traffic through a proxy. Here is my setup:

Laptop --> ssh traffic --> remote ssh server (owned by me) --> privoxy (socks5) --> TOR.

As you can see, my main goal is this. I want to ssh into my remote server, and then all the outbound webtraffic generated on the remote server must go via TOR.

I am running perfectly running reverse proxy server for multiple domains, with 1 TB of RAM, 160 TB of HDD, fast as hell, running at this moment 364 websites, where pass thru data is around 1-5 GB per second.

I know how to have squid work as a transparent proxy. You put it into transparent mode then use your router or IPTABLES to forward port 80 to the squid port. I would like to do the same for SSL. Every guide I see mentions setting up keys on the squid server.

I'm working on a software which connects to a Real Time data server (using TCP) and I have some connections dropping. My guess is that the clients do not read the data coming from the server fast enough. Therefore I would like to monitor my TCP sockets.