At 2:19 PM +0200 10/1/01, Alexander Langer wrote: > >> alex> 15329 ?? S 0:00.02 lpd -4 >> alex> alex@oink ~ $ lpq > > alex> lpd: Host name for your address >(fe80::250:baff:fed4:a512%xl0) unknown > >I started lpd on this machine: (with the -4 flag, see above).
>alex@oink ~ $ uname -a ; ifconfig -a >FreeBSD oink.cichlids.com 5.0-CURRENT FreeBSD 5.0-CURRENT #0: Sat >Sep 1 15:25:41 CEST 2001 >[EMAIL PROTECTED]:/usr/obj/usr/src/sys/GENERIC i386 >rl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > inet 192.168.0.19 netmask 0xffffff00 broadcast 192.168.0.255 > inet6 fe80::250:baff:fed4:a512%rl0 prefixlen 64 scopeid 0x1 >This is the printcap from this machine: > >lp|local line printer:\ > :sh:\ > :rm=neutron:\ > :sd=/var/spool/output/lpd:lf=/var/log/lpd-errs: > >Note that "neutron" has: >alex@oink ~ $ ping6 neutron >PING6(56=40+8+8 bytes) fe80::250:baff:fed4:a512%rl0 > --> fe80:1::250:4ff:fe0f:5a27 > >Then I just start lpd (or lpd -4, same effect), and this happens. >when I do rm=192.168.0.1 in the printcap, I get: >root@oink ~ $ lpq >oink.cichlids.com: Warning: no daemon present >Rank Owner Job Files Total Size >1st alex 0 (standard input) 419326 bytes > >lpd: Host name for your address (192.168.0.19) unknown > >So, this MIGHT be the reason: The IPv4 address is nonexistent, >but it displays the IPv6 address as error address. However, it's >still bad that he uses and IPv6 stuff when I specify -4 > >BTW, it works if I add a PTR for 192.168.0.19. I am currently battling some kind of cold or flu, so my thinking may be a bit confused. Still, after reading all your messages a few times, I think I understand what is happening. You have a machine which is a "client", as far as printing is concerned. That machine is oink.cichlids.com. In the printcap file for that machine, you reference a printer on a different machine. That print-server machine is named neutron. On the print *client* machine, you start lpd with '-4', meaning that it (the client) should only accept jobs from IPv4-style connections. Note that this flag only effects what lpd will accept, this flag has no effect on what lpr/lpq/lprm will do when they need to connect to a remote queue. The print queue for 'lp' on oink refers to a remote machine that is named neutron. That hostname maps to an IPv6 address. Thus, lpq/lpr/lprm have no choice on how to connect to that remote host. They use the IPv6 address. (note, for instance, that your 'ping6' knows about neutron via IPv6, not IPv4). So, the print client connects to the print server via IPv6. When the print client connects to the print server, the print server looks up the IPv6 address of the *client*, because the client made an IPv6 connection to the server. Again, this has nothing to do with 'lpd -4' on the client. The print server apparently can not find a hostname to match the IPv6 address of the client, so it returns the first error message, listing the IPv6 address of the client. You change printcap to use an IPv4 address, and the client now connects to the server using IPv4. However, the print-server also can not find a hostname to match that IPv4 address, so it returns the second error message. Assuming that all of the above is correct, then I *think* everything is working the way it is supposed to. However, I do not know the finer points of how IPv6 is supposed to work. Can a single hostname have both an IPv4 address and an IPv6 address? (as far as DNS is concerned, I mean). This I do not know. In any case, the parameters to 'lpd' are not going to effect how 'lpq' handles the printcap file. It may be that lpr/lpq/lprm need some change here, but I'm not sure what it would be. -- Garance Alistair Drosehn = [EMAIL PROTECTED] Senior Systems Programmer or [EMAIL PROTECTED] Rensselaer Polytechnic Institute or [EMAIL PROTECTED] To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message