LinuxQuestions.org
View the Most Wanted LQ Wiki articles.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Networking
User Name
Password
Linux - Networking This forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.

Notices

Closed Thread
 
Search this Thread
Old 10-27-2004, 01:24 PM   #1
mwmethe
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:

PORT STATE SERVICE
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.


Thanks

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

Rep: Reputation: 64
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.

http://www.linuxquestions.org/rules.php
 
  


Closed Thread


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
port 25 is closed? abd_bela Red Hat 3 04-12-2005 03:58 PM
Port to be closed. lancillotto4648 Debian 7 12-09-2004 06:21 AM
2.4.20-8 port 25 closed, cant open mwmethe Linux - Networking 4 10-27-2004 02:54 PM
port open but make it look closed.... Possible? benjithegreat98 Linux - Security 15 02-15-2004 10:15 PM
firewall.rc.config says :"open port 8080" but nmap says port is closed saavik Linux - Security 2 02-14-2002 12:16 PM


All times are GMT -5. The time now is 01:21 PM.

Main Menu
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration