Blocked

bhughesiii · 05-12-2005, 10:05 AM

I am trying to get a email server up, and as far as the email server goes all is well. I cannot connect through port 25 from the outside though. If I ssh into the server and do a telnet localhost 25, I get connected. If i try to go from the outside and telnet (public ip) 25 I get connection refused unable to open a connection on port 25.

Can anyone help?

Oh yeah, this even happens when iptables is shutdown, when up though it is set to allow smtp

fr_laz · 05-12-2005, 10:15 AM

Hi,

is there a WAN, some routers, some firewalls between your server and your client ?

Matir · 05-12-2005, 10:17 AM

Perhaps the SMTP server is only set to bind to the loopback interface? Which SMTP server are you running?

bhughesiii · 05-12-2005, 10:18 AM

Yes, I gave my server a public address, and trying to connect to it through my gateway/firewall. I can SSH to it, I can ping it, but no connection through port 25

bhughesiii · 05-12-2005, 10:18 AM

Quote:

Originally posted by Matir
Perhaps the SMTP server is only set to bind to the loopback interface? Which SMTP server are you running?

I am using postfix, and I have mynetworks setup to allow from our public IP on the gateway

fr_laz · 05-12-2005, 10:25 AM

Doesn't your gateway/firewall blocks the packets ?

bhughesiii · 05-12-2005, 10:27 AM

The gateway I use to go out, allows everything out and nothing but ssh in. The email server allows only SSH, SMTP, and telnet

Matir · 05-12-2005, 10:45 AM

Well, is the mail server BEHIND the gateway?

bhughesiii · 05-12-2005, 10:58 AM

Quote:

Originally posted by Matir
Well, is the mail server BEHIND the gateway?

No, the server has it's own public IP address.. on the outside of the gateway.. It uses the gateway address given to me by the ISP

Matir · 05-12-2005, 01:44 PM

If the gateway is blocking packets coming in, then how do you expect them to get to the server?