can't connect to avahi-daemon? Why not?!

[Dr. Michael J. Chudobiak]

Hi all,

I'm having a hard time making the new cups server broadcast method work. 
The avahi-daemon on my print server is not cooperating. It appears to be 
running, but nothing can access it. Why?

Any help most appreciated! Debugging output below...

- Mike


[root at ulmo ~]# avahi-browse -a
Failed to create client object: Daemon not running

but ...

[root at ulmo ~]# systemctl status avahi-daemon.service
avahi-daemon.service - Avahi mDNS/DNS-SD Stack
    Loaded: loaded (/usr/lib/systemd/system/avahi-daemon.service; enabled)
    Active: active (running) since Thu 2013-07-18 18:24:11 EDT; 17h ago
  Main PID: 474 (avahi-daemon)
    Status: "Server startup complete. Host name is ulmo.local. Local 
service cookie is 1758851528."
    CGroup: name=systemd:/system/avahi-daemon.service
            ├─474 avahi-daemon: running [ulmo.local]
            └─478 avahi-daemon: chroot helper

Jul 18 22:37:20 ulmo avahi-daemon[474]: Received response from host 
192.168.0.43 with ....0'
Jul 18 23:37:20 ulmo avahi-daemon[474]: Received response from host 
192.168.0.43 with ....0'
Jul 19 00:37:20 ulmo avahi-daemon[474]: Received response from host 
192.168.0.43 with ....0'
Jul 19 01:37:20 ulmo avahi-daemon[474]: Received response from host 
192.168.0.43 with ....0'
Jul 19 02:37:20 ulmo avahi-daemon[474]: Received response from host 
192.168.0.43 with ....0'
Jul 19 03:37:20 ulmo avahi-daemon[474]: Received response from host 
192.168.0.43 with ....0'
Jul 19 04:37:20 ulmo avahi-daemon[474]: Received response from host 
192.168.0.43 with ....0'
Jul 19 05:37:20 ulmo avahi-daemon[474]: Received response from host 
192.168.0.43 with ....0'
Jul 19 06:37:20 ulmo avahi-daemon[474]: Received response from host 
192.168.0.43 with ....0'
Jul 19 07:37:20 ulmo avahi-daemon[474]: Received response from host 
192.168.0.43 with ....0'
Jul 19 08:29:32 ulmo avahi-daemon[474]: Files changed, reloading.
Jul 19 08:29:32 ulmo avahi-daemon[474]: Files changed, reloading.
Jul 19 08:29:32 ulmo avahi-daemon[474]: Files changed, reloading.
Jul 19 08:29:32 ulmo avahi-daemon[474]: Files changed, reloading.
Jul 19 08:29:32 ulmo avahi-daemon[474]: Service group file 
/services/udisks.service ch...ng.
Jul 19 08:29:32 ulmo avahi-daemon[474]: Service "ulmo" 
(/services/udisks.service) succ...ed.
Jul 19 08:29:33 ulmo avahi-daemon[474]: Withdrawing address record for 
192.168.0.2 on em1.
Jul 19 08:29:33 ulmo avahi-daemon[474]: Leaving mDNS multicast group on 
interface em1.....2.
Jul 19 08:29:33 ulmo avahi-daemon[474]: Interface em1.IPv4 no longer 
relevant for mDNS.
Jul 19 08:29:33 ulmo avahi-daemon[474]: Joining mDNS multicast group on 
interface em1.....2.
Jul 19 08:29:33 ulmo avahi-daemon[474]: New relevant interface em1.IPv4 
for mDNS.
Jul 19 08:29:33 ulmo avahi-daemon[474]: Registering new address record 
for 192.168.0.2...v4.

selinux and iptables are OK:

[root at ulmo ~]# sestatus
SELinux status:                 enabled
SELinuxfs mount:                /sys/fs/selinux
SELinux root directory:         /etc/selinux
Loaded policy name:             targeted
Current mode:                   permissive
Mode from config file:          permissive
Policy MLS status:              enabled
Policy deny_unknown status:     allowed
Max kernel policy version:      28

[root at ulmo ~]# iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination