On 05/15/2012 10:39 AM, Steven Stern wrote:
On 05/15/2012 12:13 PM, Rick Stevens wrote:
On 05/15/2012 09:53 AM, Steven Stern wrote:
On 05/15/2012 11:07 AM, Rick Stevens wrote:
On 05/15/2012 07:24 AM, Steven Stern wrote:
On 05/15/2012 08:57 AM, Paul W. Frields wrote:
On Mon, May 14, 2012 at 11:25:47PM +0200, Reindl Harald wrote:
Am 14.05.2012 23:22, schrieb Steven Stern:
I have a really nice HP printer that's currently connected via USB
cable
to this system. I need to move it out of cable range. My OS/X and
iOS
devices are able to find it and print to it using the magic of
Bonjour.
Is there a way for Fedora to use it via Avahi, rather than ipp
and
giving the printer a fixed IP address?
http://localhost:631/
CUPS does find network-printers via avahi
Ensure that your Fedora client system's firewall has port 5353/udp
(mDNS) and 631/udp (IPP client) open, and things should generally Just
Work(tm).
It seems to be more than 5353 and 631. With the iptables service
running, I don't see the printer in CUPS. If I stop the iptables
service, I do. What's missing here?
ACCEPT all -- anywhere anywhere state
RELATED,ESTABLISHED
ACCEPT icmp -- anywhere anywhere
ACCEPT all -- anywhere anywhere
ACCEPT ah -- anywhere anywhere
ACCEPT esp -- anywhere anywhere
ACCEPT udp -- anywhere anywhere state NEW
udp dpt:isakmp
ACCEPT udp -- anywhere 224.0.0.251 state NEW
udp dpt:mdns
ACCEPT udp -- anywhere anywhere state NEW
udp dpt:ipp
ACCEPT tcp -- anywhere anywhere state NEW
tcp dpt:ipp
ACCEPT udp -- anywhere anywhere state NEW
udp dpt:ipp
ACCEPT udp -- anywhere anywhere state NEW
udp dpt:netbios-ns
ACCEPT udp -- anywhere anywhere state NEW
udp dpt:netbios-dgm
ACCEPT tcp -- anywhere anywhere state NEW
tcp dpt:ssh
ACCEPT tcp -- anywhere anywhere state NEW
tcp dpt:db-lsp
ACCEPT udp -- anywhere anywhere state NEW
udp dpt:db-lsp
ACCEPT udp -- anywhere anywhere state NEW
udp dpt:rfe
ACCEPT tcp -- anywhere anywhere state NEW
tcp dpt:rfe
ACCEPT tcp -- anywhere anywhere state NEW
tcp dpt:51413
ACCEPT udp -- anywhere anywhere state NEW
udp dpt:51413
ACCEPT tcp -- anywhere anywhere state NEW
tcp dpt:mdns
REJECT all -- anywhere anywhere
reject-with icmp-host-prohibited
HP often uses "jetdirect" (TCP port 9100), so make sure that's
permitted in your firewall as well.
With the firewall disabled, avahi-discover -a shows the printer. With it
enabled, it doesn't.
When you see it, does it show up as "JetDirect" or IPP? Did you open
TCP port 9100 in your firewall?
The rule would (in /etc/sysconfig/iptables) would look like:
-A INPUT -m state --state NEW -m tcp -p tcp --dport 9100 -j ACCEPT
and "iptables -L" would look like:
ACCEPT tcp -- anywhere anywhere state NEW
tcp dpt:jetdirect
Yes, but Jet Direct isn't the issue. It's Avahi, and I'm using
avahi-discover to look for the printer. It seems that 5353 udp&tcp
aren't enough.
You're saying that with the firewall disabled, avahi DOES see the
printer, but with the firewall enabled, avahi doesn't. Therefore the
firewall is blocking the discovery.
It's my guess is because your firewall is blocking the jetdirect port
that the HP printer is actually on so avahi can't see it. It's only a
guess, but that's why I'm trying to get you to open up that port,
enable the firewall and see if avahi sees it at that point.
If you know what the printer's IP is at this time, you could also
disable the firewall, run "tcpdump host printer-ip" and when avahi
pokes it, see which port the printer responds on. That's what needs to
be open on your firewall.
----------------------------------------------------------------------
- Rick Stevens, Systems Engineer, AllDigital ricks@xxxxxxxxxxxxxx -
- AIM/Skype: therps2 ICQ: 22643734 Yahoo: origrps2 -
- -
- Try to look unimportant. The bad guys may be low on ammo. -
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