Windows Forum

Ask something
Discussion Locked

SBS2000 not disconnecting from ISP.

0 helpful
1 reply

by e-profits 1 view

Closed to new repliesThis discussion is closed. It stays readable, but it takes no new replies.

I have Small Business Server 2000 setup and running. It has 2 Network cards (1 for local lan, 1 connected to a router). It is sending and receiving email and browsing the net without any problems.

The router times out after 2 mins idle and disconnects ok after web browsing.

Exchange Server was set up with the Internet Connection Wizard and is set to connect every 30 mins. The server dials out every 30 minutes but does not disconnect. I have ran a packet sniffer (commview) and there is constant transfer with the ISPs smtp server. There is no mail waiting to be delivered from the isp. The routers built in LAN packet tracer displays the source as the 2nd NIC's IP like so:- 11.0.0.1:4879 What is the 4879? and why does the server not disconnect after a scheduled dial up? Please help me, I have no more hair to pull out and have ran out of headache tablets.

Thank you

RW

1 reply

by fedya

4879 is a source port (random, means nothing)
11.0.0.1 is IP address of your second NIC (correct?).

The things you should note: what is destination IP address, destination port, protocol (UDP, TCP) of the packets. This would give us a clue aboutthe nature of traffic which goes between the server and router.

My understanding is that this traffic is the reason for the router can't disconnect, because the router will disconnect only if there is no packets on dial-up interface for 2 minutes.

Also check if your router allows setting up filters which define what kind of traffic could initiate and maintain the dial-up connection. You could set these filters for example this way: SMTP and HTTP traffic is allowed, other - not.

regards,
feodor trubetskoy

This discussion is closed to new replies.