TCP Proxy with multiple clients

PROXYtcp

I am looking for a TCP proxy – a utility that will connect to a port, read a TCP stream, and write it to clients that connect to it.

The key point here is that there may be more than one client, and each client should receive a copy of the stream.

Preferably windows solution, but Linux can be useful as well.

Best Answer

you can also do it by using iptables . of course you won't have the "control" that you 'd have if you deploy it in higher level. But it's still a quick and dirty solution :>

Related Solutions

Duplicate Incoming TCP Traffic on Debian Squeeze – Resolution Tips

If you don't want to write anything, maybe netcat listening on one port, piping to tee, and tee going to a couple named pipes, that are in turn netcat to the prod and test server ports?

Something like:

mkfifo /tmp/prodpipe
mkfifo /tmp/testpipe
nc -l 9999 -k | tee /tmp/prodpipe | tee /tmp/testpipe

And, in separate terminals:

cat /tmp/prodpipe | nc 127.0.0.1 12345

and

cat /tmp/testpipe | nc 127.0.0.1 23456

And then your client spews at port 9999.

Does the TCP source port have to be unique per host

It's not a TCP requirement. As far as TCP is concerned, only the combination of source IP, source port, destination IP, and destination port needs to be unique. However, in practice most TCP APIs don't provide any way to create more than one connection with the same source port, unless they have different source IP addresses.

Best Answer

Related Solutions

Duplicate Incoming TCP Traffic on Debian Squeeze – Resolution Tips

Does the TCP source port have to be unique per host

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