On Mon, 2005-10-10 at 14:32 +0400, Gleb Smirnoff wrote: > Iasen, > > On Fri, Oct 07, 2005 at 05:58:55PM +0300, Iasen Kostov wrote: > I> IMHO proxy arp should only replay on specified interface not on every > I> arp capable interface which recieved request for the proxied address. > I> If lets say host A have arp capable if0 and if1 interfaces and U set: > I> route add -host 1.0.0.2 -iface if1 -proxy > I> > I> and then a request is recieved on if0 for 1.0.0.2, host A will replay > I> that it has it (which IMHO is wrong as the proxy route is set for if1). > I> > I> This sometimes is a big problem for our PPPoE/VPN server when the > I> client uses linux or some small routers (e.g Linksys or something) > I> probably linux based. It happen that sometimes (when the link is down or > I> god knows why) it broadcasts arp "who-has" and the gateway replays. Then > I> this host try to use ethernet path and not the (right) tunnel path until > I> arp cache expires (which is not real fun as there is firewall rules > I> blocking ethernet path :)). > I> > I> And even worse :) - I can think of ways to bypass routing protocols > I> using proxy-arp routes like the one mentioned above. But it will not > I> work if proxy-arp behaves the way it does now. > I> And 1 thing more - there could be a switch which restores (or turns on) > I> old behavior. > I> > I> (patch agains 5.4-STABLE is attached) > > Isn't this what you need? > > http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/netinet/if_ether.c?rev=1.140&content-type=text/x-cvsweb-markup > Exactly :). Thanks. This probably won't make it into 5.x but its good to know that it's fixed :) regards.
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