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Created January 6, 2019 21:45
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set up ufw to forward requests to port 2222 of server to same server, port 22
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ufw.md

Foward requests to one port to another on the same server

I wanted to forward requests comming to a server on port 2222 to the same server port 22.

I'm using ufw for the firewall on the server.

  1. allow port 22 and 2222 on the server.
$ sudo ufw allow 22
$ sudo ufw allow 2222
  1. Setup port forwarding requests by editing /etc/ufw/before.rules. Add the following to the top, just before *filter section:
*nat
:PREROUTING ACCEPT [0:0]
-A PREROUTING -p tcp --dport 2222 -j REDIRECT --to-port 22
COMMIT
  1. Finally, enable the ufw rules and restart ufw service:
$ sudo ufw enable
$ sudo service ufw restart
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