cannot telnet to port 25 form external intereface

I am running a solaris 9 box with sendmail 8.12.5. The machine has 2
interfaces one with a private IP (172.20.20.10) another with a public
ip.
I can telnet to port 25 on the private ip and the localhost but not on
the public ip.
I can send emails out but I cannot receive them.
I have set up a default route to the external ip. Any help will be
appreciated.

Re: cannot telnet to port 25 form external intereface

On Fri, 16 Nov 2007 17:59:12 -0800, pibe1 wrote:

> I am running a solaris 9 box with sendmail 8.12.5. The machine has 2
> interfaces one with a private IP (172.20.20.10) another with a public
> ip.
> I can telnet to port 25 on the private ip and the localhost but not on
> the public ip.

Firewall, either an external one or Solaris IPF.

Re: cannot telnet to port 25 form external intereface

Dave Uhring writes:

> On Fri, 16 Nov 2007 17:59:12 -0800, pibe1 wrote:
>
>> I am running a solaris 9 box with sendmail 8.12.5. The machine has 2
>> interfaces one with a private IP (172.20.20.10) another with a public
>> ip.
>> I can telnet to port 25 on the private ip and the localhost but not on
>> the public ip.
>
> Firewall, either an external one or Solaris IPF.

The best tool for detecting/locating external firewalls is tcptraceroute
executed on "any internet host" (it is different than traceroute).

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[pl>en: Andrew] Andrzej Adam Filip : anfi@priv.onet.pl : anfi@xl.wp.pl
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