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SubjectClass B, Name lookups? BUG?
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Hello. If this is a network code bug, it is of interest
to kernel hackers. If not, I do apolgize.

We are now on a Class B network, and reach the internet through a
firewall proxy.

Before, when we were on a Class C, everything worked ok. Now,
Name lookups will not work. Name lookups with nslookup are ok,
but applications are broken.

Example:

IPADDR="10.2.3.13"
NETMASK="255.255.0.0"
NETWORK="10.2.0.0"
BROADCAST="10.2.255.255"
GATEWAY="10.2.1.254"

# ifconfig
eth0 Link encap:10Mbps Ethernet HWaddr 00:00:B4:72:FC:64
inet addr:10.2.3.13 Bcast:10.2.255.255 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:198277 errors:0 dropped:0 overruns:0
TX packets:73503 errors:0 dropped:0 overruns:0
Interrupt:15 Base address:0x340

# netstat -rn
Kernel routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.2.3.0 0.0.0.0 255.255.255.0 U 0 0 5 eth0
10.2.0.0 0.0.0.0 255.255.0.0 U 0 0 6 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 6 lo
0.0.0.0 10.2.1.254 0.0.0.0 UG 1 0 15 eth0

# nslookup ftp.uu.net
Server: bilbo.pic.net
Address: 204.58.152.2

Non-authoritative answer:
Name: ftp.uu.net
Address: 192.48.96.9


- -HOWEVER-
if I try to use any client to go to a site by hostname,
it fails. This behaviour is limited to the Linux machines.
The Sun (solaris), Macs, Windows, and Win95 do not have this problem.
Note that as long as I use IP addresses, everything works.
Note also, that my nameservers and our general TCP/IP situation are
working just fine.

I believe that it's a bug, but I hope I've made a mistake. But the fact
is, this works on the Sparcs and the Mac's and the Windows's.
I wonder if there really is anyone else using a Class B with
their router masked on a C. To repeat, my problem is not routing
or connectivity, my problem is that Linux will not resolv names
in this configuration, while the other systems do. Tested on
several different boxes.

- --
g-r-a-t-e-f-u-l-l-y---[ email:<fishbowl@conservatory.com> ]---l-i-v-i-n-g
d-e-a-d-i-c-a-t-e-d---[ http://www.conservatory.com/~fishbowl ]-----l-i-g-h-t
"Whatever the missing mass of the universe is, I hope it's not cockroaches!"




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