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Old 10-27-2004, 01:24 PM   #1
LQ Newbie
Registered: Jun 2001
Location: Southwest New Hampshire
Distribution: Mandrake, RedHat
Posts: 22

Rep: Reputation: 15
2.4.20-8 port 25 closed, cant open

Hello All,

Redhat 9 box running apache, postfix, few other things. When I nmap my local box, I am told:

Port State Service
22/tcp open ssh
25/tcp open smtp
80/tcp open http
111/tcp open sunrpc
631/tcp open ipp
6000/tcp open X11
8080/tcp open http-proxy
10000/tcp open snet-sensor-mgmt

When I nmap my domain from outside my lan I get:

20/tcp closed ftp-data
21/tcp closed ftp
25/tcp closed smtp
80/tcp open http
81/tcp open hosts2-ns
110/tcp closed pop-3
113/tcp closed auth
232/tcp open unknown
252/tcp closed unknown
3389/tcp open ms-term-serv
5901/tcp closed vnc-1
8080/tcp open http-proxy

Why do 21, 25 110 all show up as closed from the outside. I have verified that my ISP (RoadRunner) does not block 25. I cant figure this out. Even iptabes looks clean:

Chain INPUT (policy ACCEPT)
target prot opt source destination

Chain FORWARD (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

Any help you guys can offer would be GREATLY appreciated. I am running out of hair.


-=Mike M
Old 10-27-2004, 01:37 PM   #2
Registered: Mar 2003
Location: Scotland
Distribution: Slackware, RedHat, Debian
Posts: 12,047

Rep: Reputation: 66
Please do not post the same thread in more than one forum. Picking the most relevant forum and posting it once there makes it easier for other members to help you and keeps the discussion all in one place.

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