15 July 2010

Nasty trick for PortForward/DMZ on a TP-Link TD-8810 ADSL modem

You need to remove the (default 3x) "Bridge" entries in the DSL settings before a NAT entry will appear in the Advanced Settings menu, through which you can then configure Port Forwarding or DMZ... & a Port Forward rule which alters the port numbers en passant has yet to work for me — so, if you want SSH on port #2222 instead of #22, add "Port 2222" to your /etc/sshd_config file on the server, restart sshd, then configure the modem to port-forward TCP/2222 to the server concerned without altering the target port numbers.

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