On Fri, 2004-12-03 at 17:22, John P. Looney wrote:
> On Fri, Dec 03, 2004 at 05:11:30PM +0000, John Reilly mentioned:
> > Blocking all icmp is bad. Blocking echo packets and their responses
> > doesn't cause any harm.
>> Except piss people off that try and debug network problems.
telnet ipaddress 25
Would verify that SMTP is open trough a firewall. Same goes for any
service you are trying to debug.
Anyway, its simple to just flush the rules temporarily as a test to rule
out foirewal issues.
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