The following header lines retained to effect attribution:
|Date: Wed, 24 Jan 2001 23:22:28 -0500 (EST)
|From: Tom Diehl <[EMAIL PROTECTED]>
|Subject: Re: Fw: Could not reverse map address
|To: David Knight French <[EMAIL PROTECTED]>
|Cc: [EMAIL PROTECTED]
|On Sun, 21 Jan 2001, David Knight French wrote:
|> See embedded responses...
|> You can check this by running nslookup on the TO machine in question. Pick an
|> ip address in your local net, best would be one of the failing FROM machines
|> that is not logging into the TO machine:
|> nslookup 123.123.123.123
|This fails. It looks like the IPS's DNS is hosed. nslookup machine.name is ok
|but a lookup with the ip does not even return a machine name. resolv.conf looks
|ok. The only thing in it is a search line and 2 nameserver lines and they are
|pointing to the correct nameservers.
|Thanks for the help,
|......Tom ATA100 is another testimony to the fact that pigs can be
|[EMAIL PROTECTED] made to fly given sufficient thrust (to borrow an RFC)
| Alan Cox lkml 11 Jan 01
This may help when your own name servers are down or ``wrong'':
Looking up www.nns.ru (a news service in Russia, the important part
is that it is not native to any of our name servers):
The Internet root name servers currently are:
I.ROOT-SERVERS.NET internet address = 192.36.148.17
E.ROOT-SERVERS.NET internet address = 192.203.230.10
D.ROOT-SERVERS.NET internet address = 128.8.10.90
A.ROOT-SERVERS.NET internet address = 198.41.0.4
H.ROOT-SERVERS.NET internet address = 128.63.2.53
C.ROOT-SERVERS.NET internet address = 192.33.4.12
G.ROOT-SERVERS.NET internet address = 192.112.36.4
F.ROOT-SERVERS.NET internet address = 192.5.5.241
B.ROOT-SERVERS.NET internet address = 128.9.0.107
J.ROOT-SERVERS.NET internet address = 198.41.0.10
K.ROOT-SERVERS.NET internet address = 193.0.14.129
L.ROOT-SERVERS.NET internet address = 198.32.64.12
M.ROOT-SERVERS.NET internet address = 202.12.27.33
Pick one of the root servers IP addresses and do:
# nslookup www.nns.ru 192.36.148.17
Server: i.root-servers.net
Address: 192.36.148.17
Authoritative answers can be found from:
RU nameserver = NS2.NIC.FR
RU nameserver = NS.EU.NET
RU nameserver = NS.RIPN.NET
RU nameserver = NS.RELCOM.EU.NET
RU nameserver = NS2.RIPN.NET
RU nameserver = SUNIC.SUNET.SE
RU nameserver = NS.UU.NET
NS2.NIC.FR internet address = 192.93.0.4
NS.EU.NET internet address = 192.16.202.11
NS.RIPN.NET internet address = 194.85.119.1
NS.RELCOM.EU.NET internet address = 193.124.23.3
NS2.RIPN.NET internet address = 195.209.0.6
SUNIC.SUNET.SE internet address = 192.36.125.2
NS.UU.NET internet address = 137.39.1.3
Pick the one of the authorative name servers IP addresses and do:
# nslookup www.nns.ru 192.93.0.4
Server: ns2.nic.fr
Address: 192.93.0.4
Authoritative answers can be found from:
NNS.ru nameserver = flex.tcnet.ru
NNS.ru nameserver = ns.demos.su
NNS.ru nameserver = ns.NNS.ru
NNS.ru nameserver = ns1.NNS.ru
flex.tcnet.ru internet address = 195.230.64.13
ns.demos.su internet address = 194.87.0.8
ns.demos.su internet address = 194.87.0.9
ns.NNS.ru internet address = 195.230.65.130
ns1.NNS.ru internet address = 195.170.224.34
Now we are at the name server for the domain! Pick one of the
domain name servers IP addresses:
# nslookup www.nns.ru 195.230.65.130
Server: nel-gw.tcnet.ru
Address: 195.230.65.130
www.nns.ru canonical name = alyona.nns.ru
nns.ru nameserver = ns.nns.ru
nns.ru nameserver = ns1.nns.ru
nns.ru nameserver = flex.tcnet.ru
nns.ru nameserver = ns.demos.su
ns.nns.ru internet address = 195.230.65.130
ns1.nns.ru internet address = 195.170.224.34
flex.tcnet.ru internet address = 195.230.64.13
ns.demos.su internet address = 194.87.0.8
ns.demos.su internet address = 194.87.0.9
Interesting, www.nns.ru is not the canonical name of the machine!
Now we need to look up the canonical name.
# nslookup alyona.nns.ru 195.230.65.130
Server: nel-gw.tcnet.ru
Address: 195.230.65.130
alyona.nns.ru internet address = 195.230.79.14
nns.ru nameserver = ns.nns.ru
nns.ru nameserver = ns1.nns.ru
nns.ru nameserver = flex.tcnet.ru
nns.ru nameserver = ns.demos.su
ns.nns.ru internet address = 195.230.65.130
ns1.nns.ru internet address = 195.170.224.34
flex.tcnet.ru internet address = 195.230.64.13
ns.demos.su internet address = 194.87.0.8
ns.demos.su internet address = 194.87.0.9
www.nns.ru translate to the IP address 195.230.79.14
Randolph J. Herber, [EMAIL PROTECTED], +1 630 840 2966, CD/CDFTF PK-149F,
Mail Stop 318, Fermilab, Kirk & Pine Rds., PO Box 500, Batavia, IL 60510-0500,
USA. (Speaking for myself and not for US, US DOE, FNAL nor URA.) (Product,
trade, or service marks herein belong to their respective owners.)
