Subj : IPv6 test To : Michiel van der Vlist From : Tommi Koivula Date : Mon Sep 07 2015 17:53:30 07 Sep 15 01:04, you wrote to me: TK>> Squid and netsh are running on Windows 2003 server. TK>> "\\HAL has been up for: 115 day(s), 21 hour(s), 25 minute(s)," MV> So maybe the port proxy is more stabel on Windows 2003 server than on MV> Win XP. Possibly m$ has some weird limitations. Who knows. Never use a client OS as server. ;) Have you tried to run daily something like this: netsh int portproxy delete v6tov4 ...... netsh int portproxy add v6tov4 ....... netsh int portproxy show all 'Tommi --- * Origin: nntp://[2001:470:1f15:cb0:f1d0:2:221:6] (2:221/6) .