OK, I'll go with MTNL's "sahi" clock and my computer clock out of sync but I never rebooted the modem @ about 06:00 hours in the two entries in question. Also, there was no power outage; it would have shown up in my UPS monitor alarm logs. DSL modem is set to "always connected" Is MTNL resetting the PPPoE connection randomly?I try to account for the time difference between MTNL's clock and IST. On my system a cron entry kills all "download" clients @ 07:55 hours. So the current skew between MTNL's clock and IST is about 6 mins.