Can not connect to port 25

Windows 2003 Server SP1 with all updated installed. No firewall or antivirus
installed. Locally no problem connecting to port 25. But can not connect
from any host on the network. Telnet server 25, returns "...Could not open
connection to host,..".

I have tried reinstalling SMTP and a lot more. You can ping the server and
connect to other ports but not port 25.

Thanks for you help in adavance.

Are you connecting (TELNETing) to the server's IP address, or to a
NetBIOS name, or to a DNS name? If either of the latter two, you may
have a name resolution issue.

Also, is your SMTP server configured to respond only to certain IP
addresses?

Yours,
Brad


_______________________________________________
Bradley J. Dinerman, MVP - Windows Server Networking
President, New England Information Security Group
http://www.neisg.org





Shawn wrote:
> Windows 2003 Server SP1 with all updated installed. No firewall or antivirus
> installed. Locally no problem connecting to port 25. But can not connect
> from any host on the network. Telnet server 25, returns "...Could not open
> connection to host,..".
>
> I have tried reinstalling SMTP and a lot more. You can ping the server and
> connect to other ports but not port 25.
>
> Thanks for you help in adavance.

Even with the IP address I can not connect to the SMTP port. I made sure
there are no SMTP restrictions.

Thanks.

"Brad Dinerman [MVP - Windows Server Netw" wrote:

> Are you connecting (TELNETing) to the server's IP address, or to a
> NetBIOS name, or to a DNS name? If either of the latter two, you may
> have a name resolution issue.
>
> Also, is your SMTP server configured to respond only to certain IP
> addresses?
>
> Yours,
> Brad
>
>
> _______________________________________________
> Bradley J. Dinerman, MVP - Windows Server Networking
> President, New England Information Security Group
> http://www.neisg.org
>
>
>
>
>
> Shawn wrote:
> > Windows 2003 Server SP1 with all updated installed. No firewall or antivirus
> > installed. Locally no problem connecting to port 25. But can not connect
> > from any host on the network. Telnet server 25, returns "...Could not open
> > connection to host,..".
> >
> > I have tried reinstalling SMTP and a lot more. You can ping the server and
> > connect to other ports but not port 25.
> >
> > Thanks for you help in adavance.
>

do a NETSTAT -NA and check on what IP address SMTP is listening on.

--
Regards,
Andrei Ungureanu
www.eventid.net
Test our new EventReader!
http://www.altairtech.ca/eventreader...lt2.asp?ref=au

"Shawn" <(E-Mail Removed)> wrote in message
news:87F6A9E4-CE14-49A0-816E-(E-Mail Removed)...
> Even with the IP address I can not connect to the SMTP port. I made sure
> there are no SMTP restrictions.
>
> Thanks.
>
> "Brad Dinerman [MVP - Windows Server Netw" wrote:
>
>> Are you connecting (TELNETing) to the server's IP address, or to a
>> NetBIOS name, or to a DNS name? If either of the latter two, you may
>> have a name resolution issue.
>>
>> Also, is your SMTP server configured to respond only to certain IP
>> addresses?
>>
>> Yours,
>> Brad
>>
>>
>> _______________________________________________
>> Bradley J. Dinerman, MVP - Windows Server Networking
>> President, New England Information Security Group
>> http://www.neisg.org
>>
>>
>>
>>
>>
>> Shawn wrote:
>> > Windows 2003 Server SP1 with all updated installed. No firewall or
>> > antivirus
>> > installed. Locally no problem connecting to port 25. But can not
>> > connect
>> > from any host on the network. Telnet server 25, returns "...Could not
>> > open
>> > connection to host,..".
>> >
>> > I have tried reinstalling SMTP and a lot more. You can ping the server
>> > and
>> > connect to other ports but not port 25.
>> >
>> > Thanks for you help in adavance.
>>

NETSTAT does show the servers IP address.

"Andrei Ungureanu [MVP]" wrote:

> do a NETSTAT -NA and check on what IP address SMTP is listening on.
>
> --
> Regards,
> Andrei Ungureanu
> www.eventid.net
> Test our new EventReader!
> http://www.altairtech.ca/eventreader...lt2.asp?ref=au
>
> "Shawn" <(E-Mail Removed)> wrote in message
> news:87F6A9E4-CE14-49A0-816E-(E-Mail Removed)...
> > Even with the IP address I can not connect to the SMTP port. I made sure
> > there are no SMTP restrictions.
> >
> > Thanks.
> >
> > "Brad Dinerman [MVP - Windows Server Netw" wrote:
> >
> >> Are you connecting (TELNETing) to the server's IP address, or to a
> >> NetBIOS name, or to a DNS name? If either of the latter two, you may
> >> have a name resolution issue.
> >>
> >> Also, is your SMTP server configured to respond only to certain IP
> >> addresses?
> >>
> >> Yours,
> >> Brad
> >>
> >>
> >> _______________________________________________
> >> Bradley J. Dinerman, MVP - Windows Server Networking
> >> President, New England Information Security Group
> >> http://www.neisg.org
> >>
> >>
> >>
> >>
> >>
> >> Shawn wrote:
> >> > Windows 2003 Server SP1 with all updated installed. No firewall or
> >> > antivirus
> >> > installed. Locally no problem connecting to port 25. But can not
> >> > connect
> >> > from any host on the network. Telnet server 25, returns "...Could not
> >> > open
> >> > connection to host,..".
> >> >
> >> > I have tried reinstalling SMTP and a lot more. You can ping the server
> >> > and
> >> > connect to other ports but not port 25.
> >> >
> >> > Thanks for you help in adavance.
> >>
>
>
>

In news:442836F6-790F-4CD6-BA22-(E-Mail Removed),
Shawn <(E-Mail Removed)> stated, which I commented on below:
> NETSTAT does show the servers IP address.

Do the other hosts on the network have a personal firewall installed?

Was Zone Alarm installed at any time and then removed (on the server or the
other workstations/servers on the network)?

Is this an Exchange server or just the SMTP service under IIS? If Exchange,
is there an SPAM utility on it? Any restrictions in the SMTP service
properties, under the "Access" tab?

Has IPSec been configured on this machine (either locally or thru a GPO)?

Have you installed and ran the SCW (Security Configuration Wizard) on this
machine or ran URL scan?

Anything you can think of will help...


--
Ace
Innovative IT Concepts, Inc
Willow Grove, PA

This posting is provided "AS-IS" with no warranties or guarantees and
confers no rights.

Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT, MVP
Microsoft MVP - Directory Services
Microsoft Certified Trainer

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