Sounds like the client is falling back to NamedPipes or some protocol other than RPC over TCP
-----Original Message----- From: [EMAIL PROTECTED] [mailto:bounce-exchange-97237@;ls.swynk.com] On Behalf Of Chris Scharff Sent: Friday, November 08, 2002 10:43 AM To: Exchange Discussions Subject: RE: Netbios client sessions for Store access Haven't seen it before. Is SP4 on your radar for the Exchange server in question? > -----Original Message----- > From: "Luck, S�nke" [mailto:soenkeluck@;kpmg.com] > Sent: Friday, November 08, 2002 3:18 AM > To: Exchange Discussions > > We've had a strange problem this week, maybe anybody has seen a similiar > thing before. We noticed Outlook clients starting to open Netbios sessions > over port 139 on two of our Exchange servers. Version used are 5.5 SP3 and > Outlook 2000. > > Normally Outlook sends a request on port 135 and gets two ports for DS and > IS access. There are Q articles on this topic, describing how to > configured > this ports to be fixed for configurations for access thru firewalls. All > Exchange servers are configured to use fixed high port numbers 1250 and > 1251 > for DS and IS access at our site. This works fine for a long time, but two > servers stopped using port 1251 for IS access a few days ago. > > We worked on this with PSS, and they found a solution - reboot the servers > ;-)) > > What happened? For some reason, that we - and even Microsoft PSS - didn't > know, on two of our mailbox servers the store process stopped listening on > port 1251. Outlook uses a fallback and opens a Netbios session on port > 139. > Via this connection, all further communication to and from the store is > routed via the system process on the Exchange Server. This works without > any > problems for the clients - as far they can access the server on port 139. > Under normal circumstances this port is not necessary for client access. > > We checked the registered services on the Exchange Server using > rpcdump.exe > and found out that the store is registered correctly on port 1251. > Connection attempts by the clients are rejected immediately. Stopping and > starting the store fixes this behaviour. As mentioned before - we > currently > don't know how we ran into this situation. All server configuration > settings > are correct (and even the same as on all other servers in the site), the > problem only occurred on one location in a time frame where a lot of > network > changes has been done. > > Any comments? > > > S�nke Luck > KPMG Germany - Messaging Team > > > -- > Die Information in dieser eMail ist vertraulich und kann dem > Berufsgeheimnis unterliegen. Sie ist ausschliesslich fuer den Adressaten > bestimmt. Jeglicher Zugriff auf diese eMail durch andere Personen als den > Adressaten ist untersagt. Sollten Sie nicht der fuer diese eMail bestimmte > Adressat sein, ist Ihnen jede Veroeffentlichung, Vervielfaeltigung oder > Weitergabe wie auch das Ergreifen oder Unterlassen von Massnahmen im > Vertrauen auf erlangte Information untersagt. In dieser eMail enthaltene > Meinungen oder Empfehlungen unterliegen den Bedingungen des jeweiligen > Mandatsverhaeltnisses mit dem Adressaten. > > The information in this email is confidential and may be legally > privileged. It is intended solely for the addressee. Access to this email > by anyone else is unauthorized. If you are not the intended recipient, any > disclosure, copying, distribution or any action taken or omitted to be > taken in reliance on it, is prohibited and may be unlawful. Any opinions > or advice contained in this email are subject to the terms and conditions > expressed in the governing KPMG client engagement letter. > > > _________________________________________________________________ > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > Archives: http://www.swynk.com/sitesearch/search.asp > To unsubscribe: mailto:leave-exchange@;ls.swynk.com > Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:leave-exchange@;ls.swynk.com Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:leave-exchange@;ls.swynk.com Exchange List admin: [EMAIL PROTECTED]
