No, the ISP swears it is wide open.
>Any kind of filtering on the router? > >-----Original Message----- >From: Steve Van Eck [mailto:[EMAIL PROTECTED]] >Sent: Friday, October 26, 2001 12:01 PM >To: Exchange Discussions >Subject: smtp problems > > >I have an interesting problem that I hope you can shed some light on. I am >running W2K, SP2 and Exchange 5.5. This box has a IP that sits directly on >our T1, the router is the only thing between it and the ISP. We recently >have been unable to receive email from SOME of our clients. I am unable to >telnet to port 25 on the exchange box from the outside world, I can telnet >to it on our segment. I have a sniffer on the segment and am getting quite >a > >few port unreachable errors. > >Header of packet that caused error follows. >IP Header - Internet Protocol Datagram > Version: 4 > Header Length: 5 (20 bytes) > Type of Service: %00000000 > Precedence: Routine, Normal Delay, Normal Throughput, Normal >Reliability > Total Length: 98 > Identifier: 54627 > Fragmentation Flags: %000 May Fragment Last Fragment > Fragment Offset: 0 (0 bytes) > Time To Live: 128 > Protocol: 17 UDP > Header Checksum: 0x0000 > Source IP Address: 66.xx.xxx.xxx > Dest. IP Address: 207.xxx.xxx.xxx > No IP Options >UDP - User Datagram Protocol > Source Port: 137 NETBIOS Name Service > Destination Port: 137 > Length: 58 > Checksum: 0x0000 >NetBIOS Name Service - Network Basic Input/Output System > Identification: 0x0000 > Parameter: 0x0000 > Request > Standard Query > > >A FreeBSD box on the same network is able to accept the mail, it is listed >as the secondary MX record. Your help is much appreciated. Steve Van Eck > > >_________________________________________________________________ >Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp > > >_________________________________________________________________ >List posting FAQ: http://www.swinc.com/resource/exch_faq.htm >Archives: http://www.swynk.com/sitesearch/search.asp >To unsubscribe: mailto:[EMAIL PROTECTED] >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:[EMAIL PROTECTED] >Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
