Can't scan from Lexmark multifunction printer - firewall issue?

Question

Hi there!
I got a Lexmark printer/scanner combo which used to work fine on my arch install. However, its mobo died, so now I'm back at another install which refuses to scan. Scanning is done through the browser via a java applet residing on the printer's webserver. The applet does start (so it's not a java issue), but refuses to receive data from the scanner. Within the printer's web interface, it reads
If using Windows XP, the Windows XP personal firewall must be disabled before using Scan to PC profiles.
, so I'm assuming it might be a firewall issue. Lexmark's website provides the following advice:
The following two command lines will open the port 5353 for incoming and outgoing connections:
iptables -I INPUT -p udp -m udp --sport 5353 -j ACCEPT
iptables -I OUTPUT -p udp -m udp --dport 5353 -j ACCEPT
NOTE: These steps will work on most distributions configured with IPTABLES. There is no common command to make these rules persistent.
As I don't know anything about IP tables, I've simply copied these commands (as root, obviously). Still, I can't scan.
So, my questions are:
1. Has anybody else ever come across an issue like this?
2. I don't even know for sure, whether this is a firewall issue - What iptabled magic would I need to temporarily disable the firewall to check?
3. I tried checking my rules by "iptables -L". How can I tell "iptables -L" to specify the ports it is working on (as I did in the commands copied from lexmark's website)?
Best wishes,
Rufus

Answer 1

Hi Bob
I believe so.  We put the install disc into this mac back when we bought it to set up the printer.  I'm assuming the scanning drivers were there as well since it's a multifunctional printer/scanner/fax wireless printer.
We've tried it both ways.  If I press the button scan on the printer, it reads can't find computer (or something like that).  When we go thru the HP icon on my computer screen and choose scan to computer, it does nothing.
We don't scan that often.  So the few times when we ran into this problem, we just did something else (like take a pic from our iPhone and email the pic...kinda stupid but did the trick.
But I want to have the function of the scanner available.  So that's why I'm here asking...thought others had this issue and had a solution.