IPv6

Hi,

I guess this is more of a feature request and as such probably belongs somewhere else, but I'll mention it here anyway.

PMTU black holes are an annoyingly common problem on the IPv6 Internet. I tend to reduce the MTU for hosts on my network to 1280 to avoid them. It would be nice if the m0n0 GUI included a setting for the MTU option of Router Advertisement packets sent on the LAN interface. At present the default of 0 seems to be used, which means option not included. With this option set to 1280, hosts on my network that were listening and paying attention would automagically reduce their MTU and there'd be one less thing to check when connectivity problems arise.

If anyone can tell me how to set the MTU option in my RAs in 1.33b1, I'd appreciate it.

Mat

m0n0wall uses rtadvd

you will find the config file in

/var/etc/rtadvd.conf

where you will find a line like this

Code:

em1:raflags="m":maxinterval#10:mininterval#4

you need to edit it (upload a new on and cp into place ) to have an mtu option like this

Code:

em1:raflags="m":maxinterval#10:mininterval#4:mtu#1280

and restart rtadvd.

I will look at adding this option into the UI when my day job stops spilling into the evenings !