do ISPs keep track of end-user IP changes within thier network?

Sam Moats sam at
Fri Dec 13 22:21:18 UTC 2013

I still have a soft spot for the Portmasters :-). We had rows of PM2's 
with US robotics 33.6K sportster modems attached on 8mm tape racks.
Back when a town of 40K people could all connect through 2XT1's and 
everyone was happy.
Sam Moats

On 2013-12-13 16:59, Jon Lewis wrote:
> On Thu, 12 Dec 2013, Sam Moats wrote:
>> I'm not sure about the current state of the industry it's been a 
>> while since I was responsible for an access network. In the past we 
>> would keep radius logs for about 4 months, these would include the 
>> username,IP address and yes (to date myself) the caller id of the 
>> customer at the time.
> We used to keep several years worth of RADIUS summary data, which
> included username, call end time, duration, IP, NAS-IP, ANI, and 
> except for where the telco wouldn't sell PRI and we had to use CT1,
> where those weren't available.  How's that for dating?  :)
> Want to go back a little further?
> Rack of Sportsters, "Digicrap"[1] on top, and some Total Control USR
> modems on the table/overflow.
> [1] That's what I ended up nicknaming Digicom's rackmount modem
> chassis as their modems were unreliable (would repeatedly lock up
> requiring manual/physical resets and causing major problems for our
> hunt group).  We eventually got them to buy it back as they were
> unable to resolve their problems.
> ----------------------------------------------------------------------
>  Jon Lewis, MCP :)           |  I route
>                              |  therefore you are
> _________ for PGP public 
> key_________

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