[CentOS] Remote print problem -- LPD, IPP and other standard printer ports

Todd Cary todd at aristesoftware.com
Thu Dec 29 05:53:39 UTC 2005


I have most ports closed on my router except the obvious (POP, SMTP, 
FTP, Interbase, SQL Server, MySQL and VNC).  Could I have a port closed 
that CUPS needs?  I have identical problems with Linux (RHE) and Mac Tiger.

Todd

Bryan J. Smith wrote:
> Todd Cary <todd at aristesoftware.com> wrote:
>   
>> Byron -
>> I got my wife a Mac (she has only been asking for one for
>> three years):  iBook G4.  Well her printer is hooked up to
>> a PC and she likes to roam around the house with the
>>     
> wireless
>   
>> connection.  Can your suggestion be implemented in this
>> environment?
>>     
>
> Yes.  Line Printer Daemon (LPD) is a well-established, legacy
> standard.  It uses port 515 and is governed by IETF RFC1179: 
>
>   http://www.ietf.org/rfc/rfc1179.txt  
>
> The new IETF standard is the Internet Printing Protocol
> (IPP).  It uses port 631 (both clear and SSL) and is governed
> by IETF RFC2910:  
>   http://www.ietf.org/rfc/rfc2910.txt  
>
> Another port to be aware of is port 9100, commonly referred
> to by it's vendor-centric names like a "HP JetDirect" port. 
> The technical name is the [HP] Page Description Language
> datastream (PDL-datastream) port.  Microsoft calls it a
> "TCP/IP port", and you set it up as a local port, which maps
> back to the IP address/port.
>
> BSD/SysV UNIX LPD, LPR and LPRng offer LPD services.
>
> CUPS offers IPP by default, and it can also offer LPD
> services.
> CUPS, as a client, can also use other methods including LPD,
> IPP, SMB, PDL-datastream, etc...
> CUPS also offers a replacement spooler for NT/2000/XP that
> radically simplifies/centralizes administration for Windows
> clients.
>
> Windows Servers can offer SMB and LPD, and newer versions can
> offer IPP services.  Windows NT/2000 clients can use SMB, LPD
> and PDL-datastream, with XP adding IPP.  For IPP, LPD and
> PDL-datastream, you set it up as a "local port."
>
> Macs can also use LPD and PDL-datastream, with newer MacOS X
> releases supporting IPP.
>
>
>   

-- 
Ariste Software
2200 D Street Ext
Petaluma, CA 94952
(707) 773-4523

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