Disabling "iptables" also disables SSH...

Support for security such as Firewalls and securing linux
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forrie
Posts: 58
Joined: 2006/05/28 21:00:56

Disabling "iptables" also disables SSH...

Post by forrie » 2006/09/01 16:22:20

I have an array of systems, most of which are CentOS-4.3. The other 5 are Redhat AS 4 systems (due to EMC requiring it).

There appear to be some subtle differences between the two. The installation of RH is slightly different, and I'm gradually finding other items.

I disabled "iptables" on these systems, since we don't need it. Imagine my surprise when I found I couldn't connect to the CentOS-4 via SSH, but COULD connect to Redhat AS.

What's even more bizarre, is I can get to the Resin port on these CentOS-4.3 systems, I can ping them, but no SSH. Again, the Redhat systems are just fine.

I'm puzzled.

What may be wrong here, and how can I solve the problem. I'm going to drive back to our datacenter and re-enable iptables, for an immediate remedy.

It's worth noting that we shut off unecessary services on these systems, at this time we are only running:

autofs
rawdevices
sendmail
sshd
syslog
crond
irqbalance
network
ntpd

Any pointers would be appreciated.


Thanks!

_F

forrie
Posts: 58
Joined: 2006/05/28 21:00:56

Re: Disabling "iptables" also disables SSH...

Post by forrie » 2006/09/01 23:27:05

Well, rebooting the systems in question seems to have solved the problem.

WHY this is necessary with CentOS and NOT Redhat (when both are "presumably" the same), is beyond me.

Noteworthy, at least.

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