Address on dial up

From: JED (res1emv4_nospam__at_verizon.net)
Date: 02/28/04 

Date: Fri, 27 Feb 2004 23:16:04 GMT

I'm a newbie so please don't get too complicated.
Running Kerio vs.2 and this machine uses DHCP to get address. (UDP on local
port 68, remote 67.) However the dial-up machines here, do NOT use DHCP. I
assume the address is assigned when it connects to the ISP and that leads to
my question, but how does this happen?

Are specific ports or protocols involved during the dial up handshake? Does
the address periodically get renewed, or do we get it forever (until we hang
up?)

The reason I'm asking is, after a length of time the dial-up connection will
hang. It shows that there still IS a connection, but no data is being
transmitted; as if we've lost our address or port, or something at the ISP's
server. (Windows settings are set NOT to disconnect after a period of time,
and Windows is still running fine.) Disconnecting and re-connecting always
gets everything moving again (even downloads resume.)

In DHCP, we see the address get renewed every four hours on ports 67 & 68.
But on a dial-up we never see any attempt to renew the address (I have
always assumed that the address is ours until we disconnect.)

So why does our connection freeze? Is there an address renewal or something
simular?
Happens on different computers, running Windows 98SE & Windows ME.

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