[Dnsmasq-discuss] disable PMTU discovery

[Simon Kelley]

Bodo Bellut wrote:
> Hi,
> 
> [snip]
> 
> 
>>>For another PXE client I have to disable PMTU discovery on the machine 
>>>running dnsmasq (known Intel LANDesk problem). Do you think there's a 
>>>solution to this without globally disabling PMTU discovery?
>>>
>>
>>A new area for me:
>>
>>http://www.linux.com/base/ldp/howto/Adv-Routing-HOWTO/lartc.cookbook.mtu-discovery.html
>>
>>seems to indicate that it's possible to do it for a subnet (and maybe an 
>>individual host) using the routing table. Is that the sort of thing you 
>>mean?
> 
> 
> This would be an option. I just found another solution in the Squid 
> sources to disable PMTU discovery on a connection basis:
> 
>    int i = IP_PMTUDISC_DONT;
>    setsockopt(conn->fd, SOL_IP, IP_MTU_DISCOVER, &i, sizeof i);
> 
> If you could put this in, too, I'd be more than happy.
> 
> cu, Bodo

Ok, test29 in the usual place. This sets the option for DHCP and TFTP 
sockets. Bodo, could you check that it works OK with your broken Intel 
clients?


Cheers,

Simon.