Red Hat Bugzilla – Bug 591633
Firewall prevents discovery of mDNS devices
Last modified: 2018-11-14 14:31:54 EST
Escalated to Bugzilla from IssueTracker
Event posted on 05-12-2010 01:18pm EDT by woodard
Description of problem:
When you run hp-toolbox and try to setup a device it can't seem to find the device over the network. Other OS's have no problem. This happens even if you increase the timeout and toggle between mDNS/Bonjour or SLP
Steps to Reproduce:
find's the printer
When you do a manual find it finds it with no problem.
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This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release. Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release. This request is not yet committed for
What are your firewall settings?
Event posted on 2010-05-13 09:18 PDT by woodard
pretty light and pretty standard
# Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
-I FORWARD -m physdev --physdev-is-bridged -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
This event sent from IssueTracker by woodard
The default firewall prevents slp and mdns replies. You need to adjust the firewall in order to discover network printers.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.