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Old 05-17-2008, 05:30 AM   #1
Registered: Feb 2008
Distribution: CentOS 5.4
Posts: 59

Rep: Reputation: 15
CentOS filewall blocking 25 but not 80

I have CentOS i have just installed i can access port 80 but i cant access port 25(SMTP)i can get to it using "telnet localhost 25".
my system-config-securitylevel-tui settings are:
Security level = enabled
SElinux = enforcing
trusted devices = eth0
masquerade devices = eth0
allow incoming = ssh, www, ftp, mail(SMTP)
but when i try to telnet smtp it fails.
what setting is wrong please help.


when i exit system-config-securitylevel-tui i get this:
setenforce: SELinux is disabled

Last edited by ratcateme; 05-17-2008 at 05:32 AM. Reason: found something out
Old 05-17-2008, 06:06 AM   #2
Registered: Feb 2008
Location: JHB South Africa
Distribution: Centos, Kubuntu, Cross LFS, OpenSolaris
Posts: 806

Rep: Reputation: 41
If you are running sendmail, by default it only listens to the localhost address, if you want it to listen to all interfaces you need to configure it to do so.
Old 05-17-2008, 09:38 AM   #3
Senior Member
Registered: Jan 2006
Posts: 4,363

Rep: Reputation: 172Reputation: 172
A lot of ISPs block port 25.
Old 05-17-2008, 05:57 PM   #4
Registered: Feb 2008
Distribution: CentOS 5.4
Posts: 59

Original Poster
Rep: Reputation: 15
Thanks datopdog i am running postfix it was listening to localhost only though changed that and works fine.



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