Sponsored Content
Full Discussion: dns and hosts file
Special Forums IP Networking dns and hosts file Post 43132 by kduffin on Wednesday 12th of November 2003 01:46:56 AM
Old 11-12-2003
You should also be aware of how your hosts are actually trying to resolve hostnames. Take a look at /etc/nsswitch.conf

Cheers,

Keith

Last edited by kduffin; 11-17-2003 at 10:53 PM..
 

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Virtual Hosts and Alteon DNS conflicts

Hi, This is more of a verification rather than a question of technical nature. This is based on solaris 10 machine Could we use Virtual hosts (within our hosts file): 123.1.1.10 virtual_host_name 123.1.1.10 host_A (note: 123.1.1.10 - host_A is also in our DNS server entry) And... (0 Replies)
Discussion started by: jackola
0 Replies

2. Solaris

/etc/nsswitch.conf hosts ldap dns

Hi all Is there any reason to have "hosts ldap dns" as line in /etc/nsswitch.conf ? My understanding is that ldap does not contain any host information..(?) Best regards...Ludwig (1 Reply)
Discussion started by: ludwig
1 Replies

3. Solaris

Which lookup tool query both hosts and DNS server?

As i understand, host/nslookup/dig only query DNS server to resolve name to ip. ping can query both, but it seems if ping is blocked, ping won't return IP. traceroute can query both, but i am not able to test if traceroute is blocked, What is the result? Neither ping/traceroute is... (3 Replies)
Discussion started by: honglus
3 Replies

4. IP Networking

Hosts file ignored, no DNS entry but still routes!!

Hi all, I have an entry in my hosts file on a server called tractor as follows: 10.67.34.128 digger-m2m digger I have a DNS server configured but it doesn't seem to know about digger. When I do an nslookup on tractor for digger i get the following: new_dns1.oam.uk can't find digger: Non... (0 Replies)
Discussion started by: Donkey25
0 Replies

5. AIX

aix tcp wrappers hosts.allow hosts.deny?

hi all just installed the netsec.options.tcpwrapper from expansion pack, which used to be a rpm, for my aix 6.1 test box. it is so unpredictable. i set up the hosts.deny as suggested for all and allow the sshd for specific ip addresses/hostnames. the tcpdchk says the hosts allowed and... (0 Replies)
Discussion started by: wf201626
0 Replies

6. IP Networking

Newbie BIND DNS question: resolving upstream hosts?

Old skool UNIX and Linux geek here, but newbie to the world of DNS and bind. I've recently been tasked with replacing our DNS infrastructure, currently on Windows, with a RHEL based solution. And I assume that means using bind, which I've not used before. Here's my question: Suppose our company... (3 Replies)
Discussion started by: lupin..the..3rd
3 Replies

7. Proxy Server

IPtable rules for DNS/http/https traffic for specific hosts only, not working.

Hi there, I have a VPS and am working on a little side project for myself and friend which is a DNS proxy. Everything was great till recently. My VPS IP has been detected by some botnet or something, and I believe SMURF attacks are occuring. The VPS provider keeps shutting down my VPS... (3 Replies)
Discussion started by: phi0x
3 Replies

8. AIX

Use of /etc/hosts files in resolving the dns name

Hello, For what purpose /etc/hosts file is used.I mean how any request coming to a DNS server or a switch would know that which name and ip are configured in /etc/hosts files of a server? Best regards, Vishal (3 Replies)
Discussion started by: admin_db
3 Replies

9. AIX

How to find which internal hosts still using my DNS service ? Please help

Hello guys, I am new to AIX . I have two AIX v5.3 servers running BIND DNS service on them. The plan is to shut down only the DNS service on them, but in order to do that I have to determine which internal hosts are still using the servers to resolve DNS queries. Can you please advice on... (2 Replies)
Discussion started by: tihomirvs
2 Replies

10. Solaris

How to copy a tar file on a series of remote hosts and untar it on those hosts?

Am trying to copy a tar file onto a series of remote hosts and untar it at the destination. Need to do this without having to do multiple ssh. Actions to perform within a single ssh session via shell script - copy a file - untar at destination (remote host) OS : Linux RHEL6 (3 Replies)
Discussion started by: sankasu
3 Replies
nsquery(1)						      General Commands Manual							nsquery(1)

NAME
nsquery - query the Name Service Switch backend libraries SYNOPSIS
lookup_type lookup_query [lookup_policy] DESCRIPTION
is used to find the Name Service that returned the response to a or function call. This application is Name Service Switch aware and fol- lows the lookup policies in The supported lookup_type values are: Used to resolve host name or IP Address lookups. Used to resolve user name or UID lookups. Assumes that a numeric value is a UID. This option is to be obsoleted. Use and instead. Used to resolve user name lookups. Used to resolve UID lookups. Used to resolve group name or GID lookups. Assumes that a numeric value is a GID. This option is to be obsoleted. Use and instead. Used to resolve group name lookups. Used to resolve GID lookups. Used to resolve host name or IP Address lookups. Only IPv6 and IPv4-mapped IPv6 address will be displayed for host name lookups. The lookup_query can either be a host name, IP Address (IPv4 only), user name, user ID, group name, or group ID. The lookup_policy must be a valid lookup policy described in nsswitch.conf(4). If the policy is invalid, the system default policy will be used. The default values for lookup_policy are: dns [NOTFOUND=return] nis [NOTFOUND=return] files files nis files nis dns [NOTFOUND=return] files will display the lookup policy being used, the name of the service being queried, and the result of the query. EXAMPLES
Lookup host hondo using the default hosts lookup policy. Lookup host with ip address 15.204.204.204 using "dns files" as the hosts lookup policy. Lookup user dog using "ldap" as the passwd lookup policy. Lookup user ID 105 using the default passwd lookup policy. Lookup group wayne using group lookup policy "nis [NOTFOUND=RETURN] files". Lookup group 22 using the default group lookup policy. Lookup host rio using "dns" as the ipnodes lookup policy. RETURN VALUE
returns the following values: Success. Invalid Usage. Unknown Action. No match found in any name services queried. WARNINGS
The and lookup_type values are to be obsoleted. For use or instead. For use or instead. AUTHOR
was developed by Hewlett-Packard. SEE ALSO
nsswitch.conf(4). nsquery(1)
All times are GMT -4. The time now is 01:00 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy