My problem is that my Ayiya Tunnel stop working after quite a random amount of time. Sometimes it happens when it just idles around or when I transfer alot through it. Can't really tell. Im using FreeBSD 8.0 Beta2 as my Tunnel endpoint atm (had the same result with a Freebsd 7.2-Stable Machine before) thought it happened cause it was a really Old Machine. But now I upgraded my Hardware but still got the same issue. Im passing proto 41 in using this (pf): pass out log proto 41 from any to 212.224.0.188 keep state pass in log proto 41 from 212.224.0.188 to any keep state % ping6 ipv6.google.com PING6(56=40+8+8 bytes) 2001:6f8:900:ba3::2 --> 2001:4860:a003::68 ping6: sendmsg: No buffer space available ping6: wrote ipv6.l.google.com 16 chars, ret=-1 ping6: sendmsg: No buffer space available ping6: wrote ipv6.l.google.com 16 chars, ret=-1 Im wondering since I get following rules whenever the Tunnel is working or its on "No buffer space available" Mode again: 00:00:03.818414 rule 0/0(match): block in on xl0: [|ip6] 00:00:01.000483 rule 0/0(match): block in on xl0: [|ip6] Via pflog, couldn't get more info out of that one. The only thing that helps so far is that I stop and start aicuu again. Hope anybody can give me an idea where to dig/debug cause im kinda out. Cheers Tobi