11-20-2008
I agree with funksen: name resolution is a staged process and you could configure it to first ask a nameserver (or several nameservers successively) and only then consult the local "/etc/hosts" file.
If the system is configured to try using a nameserver which doesn't exist this would account for the time it takes to resolve the hostname.
I hope this helps.
bakunin
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hello,
I am new to Solaris.
I am using stand alone Solaris 10.0 for test/study purpose and connecting to internet via an ADSL modem which has DHCP server. My Solaris is working on VMWare within winXP. My WinXP and Solaris connects to internet by the same ADSL modem via its DHCP at the same... (1 Reply)
Discussion started by: XNOR
1 Replies
2. HP-UX
Hi.
I just installed the HP-UX 11i V2.
I have problems with CDE - it is inoperative (after logon there is a message box: messaging system failure - or something like that, it asks to check /etc/hosts and network settings).
nslookup works by hostname and IP, hostname shown the correct... (7 Replies)
Discussion started by: netwalker
7 Replies
3. Solaris
Hi All,
My current setup is:
1x Windows Server (Windows 2000 server)
1x Unix Server
2x Windows machine
3x Unix Terminals (Hostnames = A, B and C)
Problem
The problem iam having is Unix terminal C cannot be ping across by Unix terminal A or B or Unix server by using the hostname. Unix... (1 Reply)
Discussion started by: tlee
1 Replies
4. Solaris
I recently installed Solaris 10 on my Sun workstation. I cannot ping using hostname from another computer on the same network.
But I can ping using the IP address. Also I can ping other systems using their hostnames.
Can anyone give some information regarding how to resolve this issue. (4 Replies)
Discussion started by: alpha123
4 Replies
5. UNIX for Dummies Questions & Answers
hi guys
I got something I haven't been able to fix
I configure a Linux Suse 10 box, added static IP, DNS (resolv), gateway (routes) but I am not able to ping other servers by name but nslookup works and the server can navigate on internet
check below
the problematic server is server-host20
... (4 Replies)
Discussion started by: kopper
4 Replies
6. Emergency UNIX and Linux Support
Hi All,
So we added a new HP-UX 11.31 machine. Copied OS via Ignite-UX (DVD)over from this machine called machine_a. It was supposed to be named machine_c. And it is when you log in...however when I'm in the ILO console before logging in, it says:
It should say:
What gives? And how do... (4 Replies)
Discussion started by: zixzix01
4 Replies
7. UNIX for Advanced & Expert Users
anyone ever seen this problem:
I can ping the server by IP address but I can't by hostname.
nslookup is working and dns query is ok.
# nslookup mwxnsb24
Server: 10.11.49.206
Address: 10.11.49.206#53
Name: mwxnsb24
Address: 10.10.58.175
# ping... (8 Replies)
Discussion started by: linuxgeek
8 Replies
8. Solaris
hi....
i have sun solaris 10 server, fedora 10, and Windows Server.. i cant ping my sun solaris 10, fedora 10 and Windows Server using hostname (etc: ping winserver.bengkel2.com), but i can ping all using IPV4 and IPV6 address.. can u give some suggestion to solve my problem or some idea to... (3 Replies)
Discussion started by: izuan_7657
3 Replies
9. Shell Programming and Scripting
Hi
We have some 300 servers in the Data center and some of them are running with AIX and some of them are running with Solaris.
I need a script which can be run in one of the server and that script should ping the hostname of all the 300 servers.
Also the script should notify if any server is... (9 Replies)
Discussion started by: newtoaixos
9 Replies
10. IP Networking
I have vmware on my windows PC ( hostname : acer ).
vmware has RHEL 7 ( hostname : rhel7 ) installed recently.
RHEL IP configuration
IP : 192.168.5.128
Netmask : 255.255.255.0
ssh to rhel7 works from acer using putty
resolve.conf
cat /etc/resolv.conf
nameserver 192.168.5.1
host... (12 Replies)
Discussion started by: hiten.r.chauhan
12 Replies
LEARN ABOUT SUSE
mail::spamassassin::dnsresolver
Mail::SpamAssassin::DnsResolver(3) User Contributed Perl Documentation Mail::SpamAssassin::DnsResolver(3)
NAME
Mail::SpamAssassin::DnsResolver - DNS resolution engine
DESCRIPTION
This is a DNS resolution engine for SpamAssassin, implemented in order to reduce file descriptor usage by Net::DNS and avoid a response
collision bug in that module.
METHODS
$res->load_resolver()
Load the "Net::DNS::Resolver" object. Returns 0 if Net::DNS cannot be used, 1 if it is available.
$resolver = $res->get_resolver()
Return the "Net::DNS::Resolver" object.
$res->nameservers()
Wrapper for Net::DNS::Resolver->nameservers to get or set list of nameservers
$res->connect_sock()
Re-connect to the first nameserver listed in "/etc/resolv.conf" or similar platform-dependent source, as provided by "Net::DNS".
$res->get_sock()
Return the "IO::Socket::INET" object used to communicate with the nameserver.
$packet = new_dns_packet ($host, $type, $class)
A wrapper for "Net::DNS::Packet::new()" which traps a die thrown by it.
To use this, change calls to "Net::DNS::Resolver::bgsend" from:
$res->bgsend($hostname, $type);
to:
$res->bgsend(Mail::SpamAssassin::DnsResolver::new_dns_packet($hostname, $type, $class));
$id = $res->bgsend($host, $type, $class, $cb)
Quite similar to "Net::DNS::Resolver::bgsend", except that when a response packet eventually arrives, and "poll_responses" is called,
the callback sub reference $cb will be called.
Note that $type and $class may be "undef", in which case they will default to "A" and "IN", respectively.
The callback sub will be called with three arguments -- the packet that was delivered, and an id string that fingerprints the query
packet and the expected reply. The third argument is a timestamp (Unix time, floating point), captured at the time the packet was
collected. It is expected that a closure callback be used, like so:
my $id = $self->{resolver}->bgsend($host, $type, undef, sub {
my ($reply, $reply_id, $timestamp) = @_;
$self->got_a_reply ($reply, $reply_id);
});
The callback can ignore the reply as an invalid packet sent to the listening port if the reply id does not match the return value from
bgsend.
$nfound = $res->poll_responses()
See if there are any "bgsend" response packets ready, and return the number of such packets delivered to their callbacks.
$res->bgabort()
Call this to release pending requests from memory, when aborting backgrounded requests, or when the scan is complete.
"Mail::SpamAssassin::PerMsgStatus::check" calls this before returning.
$packet = $res->send($name, $type, $class)
Emulates "Net::DNS::Resolver::send()".
$res->errorstring()
Little more than a stub for callers expecting this from "Net::DNS::Resolver".
If called immediately after a call to $res->send this will return "query timed out" if the $res->send DNS query timed out. Otherwise
"unknown error or no error" will be returned.
No other errors are reported.
$res->finish_socket()
Reset socket when done with it.
$res->finish()
Clean up for destruction.
perl v5.12.1 2010-03-16 Mail::SpamAssassin::DnsResolver(3)