On Wed, 21.06.06 11:55, Norman Ramsey ([EMAIL PROTECTED]) wrote: > > > > I've doctored my slogin and ssh scripts so that if they see a hostname > > > of the form *.local, they will ask avahi-resolve to get the IP address. > > > But what I would really like to do is somehow change my system resolver, > > > so that *any* application will send .local requests to avahi and > > > other requests to the standard DNS service. Does anybody know > > > a way to change the resolver library, or to change the configuration > > > for named, to make this happen? > > > You are after 'libnss-mdns' > > I have this installed, and I made the suitable change to my > /etc/nsswitch.conf: > > > hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4
Please note that this line requires nss-mdns 0.8 to work. Unfortunately, Debian unstable is still at 0.7. The Debian maintainer seems to be vanished without a trace. At least he hasn't responded to any of my emails recently and ignored my bug report: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=369827 > And when I try 'getent hosts toller.local', as suggested in Lennart's > documentation, it works nicely. > > But unfortunately, many applications appear not to use the glibc NSS > functionality: neither curl, nor ssh, nor firefox see > 'toller.local'. Works fine here. > Even worse, I must have my system configured badly (no cacheing?), > because the time required to look up a *nonlocal* host is appalling. > Notice the difference here between local and nonlocal lookup: > > : [EMAIL PROTECTED] 10706 ; time getent hosts toller.local > 192.168.2.4 toller.local > > real 0m0.36s > user 0m0.00s > sys 0m0.00s > > : [EMAIL PROTECTED] 10705 ; time getent hosts toller > 140.247.60.147 toller toller.eecs.harvard.edu > > real 0m10.01s > user 0m0.00s > sys 0m0.00s > > Ten seconds to look up a hostname! Whereas the same nonlocal lookup > using host(1) is lightning fast (presumably exploiting a local > cache). Hmm, have you added .local to /etc/resolv.conf? If so every non-local host name is first resolved with .local appended on mDNS. non-existing mDNS hostnames will always cause the query to time out. host(1) doesn't use any local cache. It uses unicast DNS, bypassing NSS or anything. > > : [EMAIL PROTECTED] 10704 ; time host toller > toller.eecs.harvard.edu A 140.247.60.147 > > real 0m0.08s > user 0m0.00s > sys 0m0.00s > > This starts to look like a GNU NSS problem, not an Avahi problem, but > I will refine my original question: is there some way to get my local > DNS named (from bind9) to ask Avahi about hosts in the .local > domain? mDNS and unicast DNS are related but not really compatible. Such a "link" between mDNS and unicast DNS would definitely be hack and probably not worth the effort. Lennart -- Lennart Poettering; lennart [at] poettering [dot] net ICQ# 11060553; GPG 0x1A015CC4; http://0pointer.net/lennart/ _______________________________________________ avahi mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/avahi
