RE: SBS firewall blocking port 25 SMTP traffic?

Hi Steve,

Thank you for posting in SBS newsgroup.

AS I know, you should forward the incoming port 25 on firewall to port 25
of SBS's external network card. Please try to change SMTP port to 25 and
then rerun CEICW to see if it helps.

If the problem still occurs, would you please help me collect the following
in formation?

1. Do you mean you are doing test through modifying the port to 1025?
2. How many network cards on your SBS?
3. Can you telnet to port 25 of SBS from LAN client?

I appreciate your time and look forward to hearing from you.

Best regards,

Crina Li (MSFT)

Microsoft CSS Online Newsgroup Support

Get Secure! - www.microsoft.com/security

=====================================================
This newsgroup only focuses on SBS technical issues. If you have issues
regarding other Microsoft products, you'd better post in the corresponding
newsgroups so that they can be resolved in an efficient and timely manner.
You can locate the newsgroup here:
http://www.microsoft.com/communities/newsgroups/en-us/default.aspx

When opening a new thread via the web interface, we recommend you check the
"Notify me of replies" box to receive e-mail notifications when there are
any updates in your thread. When responding to posts via your newsreader,
please "Reply to Group" so that others may learn and benefit from your
issue.

Microsoft engineers can only focus on one issue per thread. Although we
provide other information for your reference, we recommend you post
different incidents in different threads to keep the thread clean. In doing
so, it will ensure your issues are resolved in a timely manner.

For urgent issues, you may want to contact Microsoft CSS directly. Please
check http://support.microsoft.com for regional support phone numbers.

Any input or comments in this thread are highly appreciated.

=====================================================

This posting is provided "AS IS" with no warranties, and confers no rights.
--------------------
| Thread-Topic: SBS firewall blocking port 25 SMTP traffic?
| thread-index: AcY3zzDVZ7HejVHvRweaBSnpiz4zBA==
| X-WBNR-Posting-Host: 217.40.109.153
| From: "=?Utf-8?B?U3RldmU=?=" <Steve@xxxxxxxxxxxxxxxxxxxxxxxxx>
| Subject: SBS firewall blocking port 25 SMTP traffic?
| Date: Wed, 22 Feb 2006 08:44:04 -0800
| Lines: 28
| Message-ID: <044F8FBF-0A80-432F-9B50-8A4AB48EACDB@xxxxxxxxxxxxx>
| MIME-Version: 1.0
| Content-Type: text/plain;
| charset="Utf-8"
| Content-Transfer-Encoding: 7bit
| X-Newsreader: Microsoft CDO for Windows 2000
| Content-Class: urn:content-classes:message
| Importance: normal
| Priority: normal
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.0
| Newsgroups: microsoft.public.windows.server.sbs
| NNTP-Posting-Host: TK2MSFTNGXA03.phx.gbl 10.40.2.250
| Path: TK2MSFTNGXA01.phx.gbl!TK2MSFTNGXA03.phx.gbl
| Xref: TK2MSFTNGXA01.phx.gbl microsoft.public.windows.server.sbs:246514
| X-Tomcat-NG: microsoft.public.windows.server.sbs
|
| Any suggestions?:
|
| I have recently upgraded a clients server to collect email via SMTP
rather
| than POP3 connector and have the following issue.
|
| No incoming mail + unable to Telnet to external IP:25
|
| The configuration consists of a Zoom router which passes all Traffic to a
| Watchguard SOHO 6 firewall. The firewall logs show SMTP traffic 'hitting'
the
| firewall. This is then forwarded on to the servers internal IP address
but it
| never arrives in Exchange.
|
| I have change the SMTP port on the Exchange server to 1025 and can telnet
| into it externally.
|
| The ISP is not blocking port 25 because traffic is hitting the firewall.
|
| As a final check I have installed a third party SMTP mail software on the
| server which listens for SMTP traffic on port 25. This IS being picked up
and
| at present is forwarded on to the Exchange port 1025 where mail is being
| received and handled by Exchange.
|
| So I know that port 25 is open on the server & that it is receiving email
| but not in Exchange, help!!
|
|
|
|
|

.

Relevant Pages

  • Re: [Newbie alert!] Is the Linksys BEFSX41 hardware Firewall/router a "real" firewall?
    ... there is very little that a real firewall appliance will ... ALL inbound and outbound traffic in real time - a simple KVM switch will ... outbound SMTP then it can spam all it wants. ... Private Ports in some versions - where you can list port ranges to block ...
    (comp.security.firewalls)
  • RE: Need assistance with Outlook over Internet config.
    ... I unable to telnet TCP 443 port of your public IP ... Temporarily disable the Firewall service. ... 'Microsoft Firewall' service. ... This newsgroup only focuses on SBS technical issues. ...
    (microsoft.public.windows.server.sbs)
  • Re: Port Range in Exceptions
    ... ability to specify port ranges, and a significant number of firewall admins ... and host-based firewall users use this feature, ... that is bad for Microsoft and is doomed to failure, ...
    (microsoft.public.windows.server.security)
  • RE: How do I forward ports?
    ... I assume that RRAS is utilized as the basic firewall since you are using ... TCP, fill in port 5900, inbound. ... Microsoft CSS Online Newsgroup Support ... This newsgroup only focuses on SBS technical issues. ...
    (microsoft.public.windows.server.sbs)
  • RE: Citrix and SBS 2003
    ... I'd like to confirm the steps you configure the port forwarding in SBS. ... Highlight NAT/Basic Firewall and you will see SBS server external ... Microsoft CSS Online Newsgroup Support ...
    (microsoft.public.windows.server.sbs)
Loading