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SOCAT redirect UDP does not work!

I am trying to transfer data in UDP datagrams in a client in an external location to a computer on my local LAN. But my network sends it via an ADSL modem to a PC with Slackware, this PC redirects packets to other PCs. I use socat to redirect UDP:

socat -v udp-listen:1935,fork,reuseaddr udp:192.168.0.40:37000

On a LAN, the connection is fine, but the external IP addresses do not work. Does anyone help?

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I don’t think it socat’s the culprit, but think about using stoneinstead socat, because using fork()for each package received is a bit strange. The stone is called in your case like this (I think):

stone -n -d -d -d -d 192.168.0.40:37000/udp 1935/udp

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