I connected to my ISP using cable modem and L2TP dialer. The problem I experience (present in firmwares .25-.27 for sure) that my Router (WRT54GS v1) gets rather random IP lease time from the router. The lease time usually in rage from 40min up to 6 days , but 1h and 24h are most common. It looks like this: The IP lease time different each time I reconnect. Somehow it looks the IP Lease time received even before it dialed L2TP, just by initial cable DHCP: Even in log I can see: Microsoft (Win7 x64, XP Pro) and other L2TP dialers do not this problem. Reseting and even clearin NVRAM on router does not help. P.S.: Being programmer myself (well Win programmer ) it feels like the variable responsible for IP lease time get overwritten by some garbage data. I would really appreciate any help.