5 ms·

kippo can't be executed as root.

• dmm 16y ago
  How does it open a server on a port <1024 without privileged access?
  • epochwolf 16y ago
    You use iptables to route port 22 on the external interface to a high port on localhost
  • rosser 16y ago
    It probably doesn't. # accept traffic to the normal ssh port iptables -A INPUT -i eth0 -p tcp --dport 22 -j ACCEPT # accept traffic on the port kippo is listening on iptables -A INPUT -i eth0 -p tcp --dport 2222 -j ACCEPT # direct traffic inbound on port 22 to port 2222 iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 22 -j REDIRECT --to-port 2222 Make sure also to add an ACCEPT rule for traffic to whatever port sshd is actually bound to.
    • dmm 16y ago
      That's fine so long as you trust all of the users on your system. Otherwise they could potentially get something running on port 22. Which, so long as you aren't actually sending auth info to 22, probably isn't a big deal.
    • cft 16y ago
      http://www.faqs.org/docs/iptables/traversingoftables.html http://www.faqs.org/docs/iptables/traversingoftables.html Table nat is traversed <b>before</b> filter table. Therefore, the rule iptables -A INPUT -i eth0 -p tcp --dport 22 -j ACCEPT is unnecessary.
      • gcb 16y ago
        Everyone, hear the post above. Damn little arrows and imprecise HTC touchscreens... downvoted you by mistake