1
vote
1answer
290 views

Can Telnet to port 21 but not 25, 110

I am running postfix and dovecot on my Centos Mail server. Now I can send mail from the server to the outside, BUT I cannot receive mail from the outside. TELNET: When I telnet to my ip address to ...
0
votes
2answers
3k views

CentOS open port 7000 [RESOLVED]

I have two boxes one ubuntu v10.10 (IP: 192.168.12.128) and another centos v5.5 (IP: 192.168.12.131) I m able to ping centos from ubuntu box and vice versa. When I telnet UBUNTUIP using port 7000 ...
0
votes
2answers
842 views

Connection closed by foreign host

When I telnet one port of my server, it give me an error: "Connection closed by foreign host", anyone can tell the reason ? thanks!
2
votes
2answers
6k views

How to forward UDP Wake-on-Lan port to broadcast IP with IPTABLES?

I'm trying to setup Wake-on-Lan for some of the LAN computers at home and it seems that I need to open a UDP port (7 or 9 being the most common) and forward all requests to the broadcast IP, which in ...