[avahi] avahi dropping out

Scott Amort amorts at queensu.ca
Thu Nov 22 13:28:56 PST 2007

Hi Lennart,

Thanks for the reply.  It does seem to be a firewall issue... opening  
up udp 5353 appears to have solved it.


On 20-Nov-07, at 12:34 PM, Lennart Poettering wrote:

> On Tue, 06.11.07 10:08, Scott Amort (amorts at queensu.ca) wrote:
>> Hello,
>> I am using avahi-daemon to advertise a netatalk share from a linux  
>> box
>> (the client's are all macs running OS X 10.4.10 or 10.5).  Everything
>> works perfectly for about three to four minutes before the avahi
>> broadcast disappears (i.e. I can still connect directly to the linux
>> box via it's ip address, so netatalk is running fine, but the server
>> no longer shows up in the network list).  If I restart the avahi-
>> daemon, it comes back and works as expected, but eventually  
>> disappears
>> again.  Has anyone else experienced this sort of behaviour?  I'm
>> running avahi 0.6.2 on a gentoo box.
> Sounds like an issue with multicasting. When the Avahi daemon starts
> up it multicasts information of its services to all machines on the
> LAN. However, when they are removed from the client's caches, they
> seem not to be refreshed anymore. This is most likely the case because
> Avahi seems not to be able to receive Multicast traffic, but is able
> to send it out.
> Reasons might be manifold:
> - Firewall
> - Broken network driver that cannot do Multicasting (Many WLAN
>  drivers, NDIS wrappers cannot do this)
> - Broken routers/APs
> See FAQ #15.
> Lennart
> -- 
> Lennart Poettering                        Red Hat, Inc.
> lennart [at] poettering [dot] net         ICQ# 11060553
> http://0pointer.net/lennart/           GnuPG 0x1A015CC4
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