linux - Port Forwarding For SSH -


i have 2 server in network , 1 of them no have internet connection (srv2).

i want forward 23 port on server (srv1) have internet connection port 22 on no internet connection server (srv2)

my ifconfig on srv1

eth0      inet addr:95.x.x.x  bcast:95.x.x.x  mask:x.x.x.x  eth1      inet addr:10.0.0.1  bcast:10.0.0.255  mask:255.255.255.0                lo        inet addr:127.0.0.1  mask:255.0.0.0

and other server ifconfig (srv2 have no internet connection)

eth0      inet addr:10.0.0.2  bcast:10.0.0.3  mask:255.255.255.252  lo        inet addr:127.0.0.1  mask:255.0.0.0

on srv1 cat /proc/sys/net/ipv4/ip_forward result 1

i can forward 3055 (srv1) port 3050 (srv2) rules;

-a prerouting -i eth0 -p tcp -m tcp --dport 3055 -j dnat --to-destination 10.0.0.2:3050 -a postrouting -o eth1 -p tcp -m tcp --dport 3050 -j snat --to-source 10.0.0.1

but can't forwarding 23 (on srv1) 22 (on srv2) ssh connection.

can ?

as recall 23 port telnet port. can't route system port (all 2 digits ports). make routing port 1234 22 no problem @ all.

it based on experience quite long time ago.


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