[cups.general] CUPS source port to printer:515

[Helge Blischke]

Adrian Gschwend wrote:
> 
> I've noticed that various printers at our university do not accept requests
> from source ports below 1024. Also if I do a nmap scan with a high port the
> port 515 on the printer is not shown. With source port 931 I get the status
> of the port as open.
> 
> Also, I can print with the old lpr which actually is using a port around 900
> as well as source port.
> 
> I tried to find a switch in cups to change the source port but no luck so
> far. Can I force cups to do that?
> 
> thanks
> 
> Adrian
> 

I guess you are talking about the LPD backend. By default (since CUPS
1.1.18, 
I think) it does not use reserved source ports, only if you append the
option
"reserve=yes" (without the quotes) to the device uri.

Helge


-- 
Helge Blischke
Softwareentwicklung
SRZ Berlin | Firmengruppe besscom
http://www.srz.de
tel: +49 30 75301-360