Re: [gentoo-user] Detecting printers at a remote site

[Mick]

On Sunday 15 June 2008, Mark Knecht wrote:
> Mick,
>    Thanks for the great write up. I really appreciate it.

You're welcome.  :-)

> On Sun, Jun 15, 2008 at 10:02 AM, Mick <michaelkintzios@×××××.com> wrote:
> <SNIP>
>
> > Check first that you allow connections on port 631 at your dad's firewall
> > from your mom's IP/MAC address (nmap or nc your dad's address from your
> > mom's machine), e.g.:
> >
> > $ nc -vv -n -z 10.10.10.4 631
> > (UNKNOWN) [10.10.10.4] 631 (ipp) open
> >  sent 0, rcvd 0
>
> I don't have nc and so far cannot find what package might contain it.
> Can you check that for me and I'll emerge but nmap seems to say port
> 631 on gandlaf (the server) is open:

You want netcat (net-analyzer/netcat), or one of the telnet packages, but nmap 
does the job.  As shown below there's no firewall blocking port 631 on your 
dad's machine.

> DesertFlower ~ # nmap gandalf
>
> Starting Nmap 4.60 ( http://nmap.org ) at 2008-06-15 11:10 PDT
> Interesting ports on Gandalf (192.168.1.2):
> Not shown: 1713 closed ports
> PORT    STATE SERVICE
> 22/tcp  open  ssh
> 631/tcp open  ipp
> MAC Address: 00:26:54:11:0F:BC (3Com)
>
> Nmap done: 1 IP address (1 host up) scanned in 0.389 seconds
> DesertFlower ~ #
>
> >> >   What commands can I run from the command line to see whether a
> >> >printer is available? My parents are not terribly computer literate
> >> >(who is in their 80's) so I need to ensure this is really working
> >> >before I tell them to use it.
> >
> > $ lpstat -a
> >
> > will show you any printers that have been configured on your mom's
> > machine.
>
> Unfortunately this is where things die:
>
> DesertFlower ~ # whoami
> root
> DesertFlower ~ # lpstat -a
> lpstat: Forbidden
> DesertFlower ~ #
>
> so solving this issue will likely start to open other things up.
>
> I've managed to get CUPS configured on their print server and my mom's
> machine such that she can see the printer, but when I try to print a
> test page I get a 403 Forbidden page which I'm assuming for now is
> CUPS version of the lpstat -a error message.
>
> Can you tell me whether the lpstat:Forbidden is saying the remote
> machine (my mom's) cannot use lpstat at all or does this mean the
> print server (my dad's machine) isn't allowing connections?

Yes, I would look again at the LAN IP addresse(s) that you have allowed 
connections from in the cupsd.conf file(s).
-- 
Regards,
Mick