On 2/12/06, Trent Lloyd <[EMAIL PROTECTED]> wrote: > On Sunday 12 February 2006 19:27, Sebastien Estienne wrote: > > Hello Maw > > > > On 2/12/06, Max Kutny <[EMAIL PROTECTED]> wrote: > > > Hi Lennart, > > > > > > I have several hosts on a public LAN tight together via a private VPN. > > > Once I got service discovery working on public LAN I chose to switch > > > to more secure environment and tried to setup discovery over the > > > private network. Unfortunately it didn't work for me. > > > > > > Digging a bit I stumbled over a mail > > > (http://lists.freedesktop.org/archives/avahi/2005-July/000075.html) > > > saying that avahi treats interface with POINTOPOINT flag set as > > > irrelevant. Although, VPN tunnels are organized exactly with this flag > > > set: > > > 7: tun0: <POINTOPOINT,MULTICAST,NOARP,UP> mtu 1500 qdisc pfifo_fast qlen > > > 100 link/[65534] > > > > > > Manually crafting and sending UDP packet with destination > > > "224.0.0.251.5353" shows that it successfully gets broadcasted via VPN > > > tunnels. > > > > > > What's the rationale behind skipping POINTOPOINT interfaces? Could it > > > be possible to make avahi more VPN friendly? > > > > Yes, avahi doesn't handle iface that have the PTP flag on them. As far > > as i remember the rationale with not supporting vpn was the timing > > issues. > > Mdns was design to work on lan (latency below 1ms), so it expects to > > have answers in timeframe that is not compatible with vpn (wan, > > latencies that are often more than 50ms) > > So mdns may not run reliably over vpn. > > Thats not really correct, mdns will run over larger latencies, wireless > networks often have latencies of 3-4ms+ > > read the spec for the exact timings. >
yeah i knew i wasn't in the exact values i just wanted to give the big picture. > > We see a growing need to support vpn, but the best solution may be to > > implement realying gateway > > > > gateway A would answers on vpn A about services discovered by gateway B on > > vpn B gate A and gate B would exchange their browsing list over unicast. > > > > I think that samba offer such a solution for Netbios browing. > > > > This would be the reflector for vpns. > > Cheers, > Trent > > > > > > Thanks. > > > > > > -- Max > > > _______________________________________________ > > > avahi mailing list > > > [email protected] > > > http://lists.freedesktop.org/mailman/listinfo/avahi > > > > -- > > Sebastien Estienne > _______________________________________________ > avahi mailing list > [email protected] > http://lists.freedesktop.org/mailman/listinfo/avahi > -- Sebastien Estienne
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