If you do a man pppd and search idle ( /idleCR does that where CR
means the enter key), you will see the parameter idle n which stops your
side of the ppp connection after n seconds of inactivity (saves you money if
you forget to drop the line here in the UK...). The line idle 180 (3
minutes) could be inserted anywhere in your file /etc/ppp/options.
There is of course an identical feature at the ISP's box. Since ISP's
exist to make money (perhaps to save money in institutions such as a
University), they could very well adjust this parameter when your matching
pppd starts at the ISP, dependin on the day and time at which you connect,
so as to serve more customers on the same number of phone lines.
Essentially, what this means is that if your ISP has an automatic disconnect
time that you can have another program "simulate activity" (ping) until the
end of time and it won't matter...it's still going to disconnect you. I
don't know of many ISP's that don't have some such system in place, perhaps
yours doesn't. There is one ISP here in the UK that disconnects you after 4
minutes of inactivity (which I can't believe they do as one can spend more
than 4 minutes reading articles on a site easily).
Try setting your idle seconds to about 1800 and see if it makes a
difference, I know that it did with mine.
Dallam
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