gif tunnel ipv4 over ipv4 don't work

[Andrey Smagin]

15 декабря 2011, 05:08 от "Bjoern A. Zeeb" <bzeeb-lists at lists.zabbadoz.net>:
> 
> On 14. Dec 2011, at 23:11 , Andrey Smagin wrote:
> 
> > Hi All! I found next issue with gif tunnels.
> > gif3 work look's like mpd without tcpmssfix - google opened, but another sites waiting read forever
> 
> Given it's RFC1918 addresses, this normally sounds like a firewall/NAT with ICMP filter breaking PMTU issue.
Issue is: I only updated system from old 9current to 10current and gif3 don't work correctly after that.
If I use ports/net/vtun to organize absolutely identical tunnel - all work good.
I don't change firewall rules or NAT, only type of tunnel.
ifaces  with vtun 
MainBox
tap3: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=80000<LINKSTATE>
        ether 00:bd:b3:b5:3a:03
        inet 192.168.254.69 netmask 0xfffffffc broadcast 192.168.254.71
        inet6 fe80::2bd:b3ff:feb5:3a03%tap3 prefixlen 64 scopeid 0x19
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
        Opened by PID 68549

Box3
tap3: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=80000<LINKSTATE>
        ether 00:bd:2f:5e:33:01
        inet6 fe80::2bd:2fff:fe5e:3301%tap1 prefixlen 64 scopeid 0xa
        inet 192.168.254.70 netmask 0xfffffffc broadcast 192.168.254.71
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
        Opened by PID 9319


> 
> --
> Bjoern A. Zeeb                                 You have to have visions!
>          Stop bit received. Insert coin for new address family.
> 
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