11-18-2015
We understand the environment now, and the problem is what?
9 More Discussions You Might Find Interesting
1. IP Networking
Hi,
We use linux as a DNS server for our local network. ( linuxnol.nollekens.be )
We can ping this machine on all our XP clients like this:
C:\>ping linuxnol
Until yesterday it was on our XP clients enough to type "ping ibm250" ( our 2de unix server, an AIX ).
But after a shutdown of this... (1 Reply)
Discussion started by: progressdll
1 Replies
2. UNIX for Advanced & Expert Users
anyone ever seen this problem
with /etc/nsswitch.conf forcing the system to look in files then dns
but the system ignores the files and goes off check the dn servers
is there any further config I've missed ???
/etc/resolve.conf name servers >>>> boring IPS
/etc/nsswitch.conf is set to... (5 Replies)
Discussion started by: kie
5 Replies
3. IP Networking
My company has a private network, including a Apache web server (Linux) and some WinXP machines. The web server had been configured to use mod_proxy to connect to window update site via another company proxy server. It works for few years.
Recently, some parties had setup a DNS server on the... (2 Replies)
Discussion started by: donaldfung
2 Replies
4. Red Hat
Hi all
m newbie in linux and trying to setup my internal DNS server for local network.After messing with DNS for hours i am posting this.
i have configured /etc/resolve.conf, hostname with domain name in /etc/sysconfig/network file,/etc/hosts file with local host entry and zone file... (1 Reply)
Discussion started by: Vaibhav.T
1 Replies
5. Red Hat
:wall:I am a beginer in Linux admin. I have build new DNS setting in my system. Please find the below procedure what I followed to build DNS. but at last when I fired nslookup command, its getting error. I am using RHEL5 OS. Please help me to resolve this below issue..
Advance thanks for... (1 Reply)
Discussion started by: pradipta_pks
1 Replies
6. Red Hat
i have redhat service as public dns i have added new entry but when i reload the named service i got this error in log
the working directory is not writable (1 Reply)
Discussion started by: leganti
1 Replies
7. Red Hat
Hello,
Having issue resolving DNS using the IP address.
Using the server Name it resolves fine.
Was wondering if there is any configuration issue.
# nslookup xxxxxxxx01
Server: Primary DNS IP
Address: Primary DNS IP#53
Name: xxxxxxxx01.local domain
Address: x.y.z.123
# nslookup... (1 Reply)
Discussion started by: ikn3
1 Replies
8. IP Networking
Hi All,
The following is the scenario.
I open the browser and request a web page. The DNS query is sent to the DNS server of my company and replies my GNU/Linux machine with a DNS response. I have "insmod"ed a kernel module that picks up the DNS response and over rides the "Addr" field of... (2 Replies)
Discussion started by: rstnsrr
2 Replies
9. HP-UX
Hi All,
I'm having some problems with our HP-UX environment. I'm running Oracle EBS on a HP-UX system, and whenever my primary dns server goes down some of my clients can no longer connect. Everything on my windows side continues to work, and clients can reach the internet and other services... (6 Replies)
Discussion started by: agonza07
6 Replies
LEARN ABOUT DEBIAN
dnstracer
DNSTRACER(8) General Commands Manual DNSTRACER(8)
NAME
dnstracer - trace a chain of DNS servers to the source
SYNOPSIS
dnstracer [options] name
DESCRIPTION
dnstracer determines where a given Domain Name Server (DNS) gets its information from, and follows the chain of DNS servers back to the
servers which know the data.
Options are:
-c Disable local caching.
-C Enable negative caching.
-o Enable overview of received answers at the end.
-q queryclass
Change the query-class, default is A. You can either specify a number of the type (if you're brave) or one of the following
strings: a, aaaa, a6, soa, cname, hinfo, mx, ns, txt and ptr.
-r retries
Number of retries for DNS requests, default 3.
-s server
DNS server to use for the initial request, default is acquired from the system. If a dot is specified (.), A.ROOT-SERVERS.NET will
be used.
-v Be verbose on what sent or received.
-4 Use only IPv4 servers, don't query IPv6 servers (only available when IPv6 support hasn't been disabled)
-S sourceaddress
Use this as source-address for the outgoing packets.
HOW IT WORKS
It sends the specified name-server a non-recursive request for the name.
Non-recursive means: if the name-server knows it, it will return the data requested. If the name-server doesn't know it, it will return
pointers to name-servers that are authoritive for the domain part in the name or it will return the addresses of the root name-servers.
If the name server does returns an authoritative answer for the name, the next server is queried. If it returns an non-authoritative answer
for the name, the name servers in the authority records will be queried.
The program stops if all name-servers are queried.
Make sure the server you're querying doesn't do forwarding towards other servers, as dnstracer is not able to detect this for you.
It detects so called lame servers, which are name-servers which has been told to have information about a certain domain, but don't have
this information.
EXAMPLES
Search for the A record of www.mavetju.org on your local nameserver:
dnstracer www.mavetju.org
Search for the MX record of mavetju.org on the root-nameservers:
dnstracer "-s" . "-q" mx mavetju.org
Search for the PTR record (hostname) of 212.204.230.141:
dnstracer "-q" ptr 141.230.204.212.in-addr.arpa
And for IPv6 addresses:
dnstracer "-q" ptr "-s" . "-o" 2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.6.4.0.2.0.0.0.0.8.b.0.e.f.f.3.ip6.int
SEE ALSO
ntptrace(8), traceroute(8), dig(1)
AUTHOR
Edwin Groothuis, edwin@mavetju.org (http://www.mavetju.org)
See http://www.mavetju.org/contacts.php for mailing-lists.
February 10, 2008 February 10, 2008 DNSTRACER(8)