Messages in this thread |  | | Date | Mon, 24 Jun 1996 12:38:52 -0500 (CDT) | From | "James L. McGill" <> | Subject | Re: Class B, Name lookups? BUG |
| |
-----BEGIN PGP SIGNED MESSAGE-----
Dear Alan Cox, et al:
What follows is hopefully enough information for someone to understand my networking problem.
I have tried to communicate the fact that I have a firm grasp of the concepts, and that this SHOULD work, and DOES work on other (e.g. Sun) systems with no problems. However this failure seems to apply to Linux, but we don't understand why or what is wrong.
The problem does not seem to relate to routing. Routing works. I can reach anything on the internet by IP address.
My DNS servers work fine. Via nslookup they lookup names. Using a client program (ftp, telnet, traceroute, ping, ssh...) that needs to lookup a name, they fail. Nothing can lookup names. At the risk of repeating myself, If I simply plug in may Net Configuration:
IPADDR=10.2.3.245 NETMASK=255.255.0.0 NETWORK=10.2.0.0 BROADCAST=10.2.255.255 GATEWAY=10.2.1.254
This works on every system I tried except for Linux. I couldn't get this to work on an out-of-the-box RedHat or Slackware install, nor on other production boxes, including virgin 1.2.13 boxes and 2.0.0 machines that have had "everything" upgraded.
I hope that I have made some simple error and somebody can point it out. I would not mind feeling stupid %-) I do feel that I have configured everything completely and checked everything twice, and I believe this should work.
If you have time to look at this typescript, I've attempted to prove my dilemma by showing what I've done, and that I've checked it thoroughly:
Script started on Mon Jun 24 11:59:46 1996
[root@junk /root]# ifconfig eth0 eth0 Link encap:10Mbps Ethernet HWaddr 00:A0:24:56:CC:5C inet addr:10.2.3.245 Bcast:10.2.255.255 Mask:255.255.0.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:93 errors:0 dropped:0 overruns:0 TX packets:51 errors:0 dropped:0 overruns:0 Interrupt:10 Base address:0xff80
[root@junk /root]# netstat -rn Kernel routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.2.0.0 0.0.0.0 255.255.0.0 U 0 0 4 eth0 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 14 lo 0.0.0.0 10.2.1.254 0.0.0.0 UG 0 0 46 eth0
# # Previously you said there may be a problem with this # routing table, but...... # # I can reach hosts on my wire. #
[root@junk /root]# ping 10.2.3.15 PING 10.2.3.15 (10.2.3.15): 56 data bytes 64 bytes from 10.2.3.15: icmp_seq=0 ttl=64 time=1.9 ms
- --- 10.2.3.15 ping statistics --- 1 packets transmitted, 1 packets received, 0% packet loss round-trip min/avg/max = 1.9/1.9/1.9 ms
[root@junk /root]# cat/etc/networks loopback 127.0.0.0 localnet 10.2.0.0
[root@junk /root]# cat /etc/hosts 127.0.0.1 localhost 10.2.3.245 junk.my.network.com junk
[root@junk /root]# cat /etc/host.conf order hosts,bind multi on
[root@junk /root]# cat /etc/resolv.conf domain my.network.com nameserver 204.58.152.2 nameserver 204.58.152.3
# I can communicate with the Internet, and # reach my nameservers.
[root@junk /root]# nslookup Default Server: bilbo.pic.net Address: 204.58.152.2
> www.whitehouse.gov Server: bilbo.pic.net Address: 204.58.152.2
Name: www.whitehouse.gov Addresses: 198.137.240.92, 198.137.240.91
> exit
# Can even reach hosts on the internet BY IP ADDRESS!
[root@junk /root]# telnet 198.137.240.92 80 Trying 198.137.240.92... Connected to 198.137.240.92. Escape character is '^]'.
telnet> quit Connection closed. [root@junk /root]# nslookup sunsite.unc.edu Server: bilbo.pic.net Address: 204.58.152.2
Non-authoritative answer: Name: sunsite.unc.edu Address: 152.2.254.81
[root@junk /root]# ftp 152.2.254.81 Connected to 152.2.254.81. 220 helios FTP server (Version wu-2.4(39) Tue May 16 01:34:21 EDT 1995) ready. Name (152.2.254.81:root): ftp 331 Guest login ok, send your complete e-mail address as password. Password: 230 Guest login ok, access restrictions apply. Remote system type is UNIX. Using binary mode to transfer files. ftp> quit 221 Goodbye.
### BUT, I cannot reach hosts by NAME. ### ### ftp sunsite.unc.edu fails. (Just plain doesn't work)
ftp sunsite.unc.edu: Host name lookup failure.
### telnet bilbo.pic.net fails. ### every client to a symbolic address fails the same way. ### It all works wonderfully if I use IP Addresses! ### I have this problem on all Slackware and RedHat boxes. ### No problems of this sort on Solaris, NT, or 95 boxes. ### ### What is going on? Please advise us.
- -- 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
I've got to fix this before we get "directed" to solve the problem by changing OS. =:-O
-----BEGIN PGP SIGNATURE----- Version: 2.6.2i
iQBVAwUBMc7Sr8PTedxmOfz5AQEAhAIAuRTytycLP/1HebhjP1PARMwPnIlsHLUY 7s5qEMODlWC2J+MZmrQAkivHsI6reueVYdNVrtO9H+VbhSz1Ggwv8Q== =MGYm -----END PGP SIGNATURE-----
|  |