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Re: How to force an application to use only ipv4?



On Sat, May 18, 2013 at 10:18:33AM +0100, abdelkader belahcene wrote:
> with recent distro mint 14 or 15 , debian 7, I have  connection pb
> I suspect a conflit ???   between ipv6 and ipv6 ?  may be my old machines
> don't understand this protocol ?

Does your old machine have an IPv6 address?  Does your new machine
have an IPv6 address?  Can you ping6 one machine from the other?

% ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
    inet6 2001:770:1d5:ffff:ffff:ffff:ffff:ffff/64 scope global dynamic 
       valid_lft 86396sec preferred_lft 14396sec
    inet6 fe80::62a4:4cff:fe5f:1257/64 scope link 
       valid_lft forever preferred_lft forever

Note the global address for eth0.  If you can't ping6 the other
machine, then there's probably no IPv6 connectivity.  All services
should default to IPv6 and fall back to IPv4 if unavailable.


Regards,
Roger

-- 
  .''`.  Roger Leigh
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