I have 2 servers, and I want to relay any broadcast traffic ( through to

Here's what I'm doing to relay port 137 traffic, and it seems to work fine.


echo ncat.exe 1337 > relay.bat
ncat.exe -l -p 137 -e relay.bat


nc -lnvp 1337

I can only find how to forward ports with ncat. I can't bind to to listen of course. I hope that makes sense what I'm trying to do.

  • netcat requires a port to listen on and is probably not what you want. You are probably looking for a relay, such as a dhcp relay, or a bridge. What type of broadcast traffic are you hoping to bridge? – Phillip Nordwall Sep 22 '14 at 4:32
  • I want to relay NBNS protocol traffic that is sent on port 137. I'm conducting a penetration test in a lab, and want to conduct an NBNS spoof attack. – sybind Sep 22 '14 at 7:59
  • I think I'm gonna close this one and open a new one, removing ncat from the equation. – sybind Sep 23 '14 at 11:33

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