[cups.bugs] CUPS and Shorewall firewall interfering with each
eslagter at wlz.nl
Mon Jan 3 01:29:47 PST 2005
On Thu, 2004-12-30 at 09:56 -0500, Erik Reuter wrote:
> CUPS was working fine to print to my Epson C84 (network connected via a
> Netgear PS101 print server using lpd://PS101.IP.address/raw ) until I
> installed the Shorewall firewall on the machine running CUPS.
> When I installed Shorewall, I opened up port 515 for lpd printing from
> the firewall to the local network
> ACCEPT fw loc tcp 515 # LPD
> so I didn't anticipate any problems with CUPS printing.
> However, as soon as I started the Shorewall firewall, I found that I
> could no longer print from the firewall machine using CUPS.
IMHO this is not a BUG.
Please note that cups uses
a) various ports (like http (80/tcp) and ipp (631/tcp and 631/udp).
b) broadcast packets (on 631/udp)
These must be opened as well.
More information about the cups