Visit Our UNIX and Linux User Community


dns and hosts file


 
Thread Tools Search this Thread
Special Forums IP Networking dns and hosts file
# 1  
Old 10-22-2003
Question dns and hosts file

ok i have a question now when i add machines on network that are running unix do i add them in the /etc/hosts file also include them in dns
# 2  
Old 10-22-2003
it depends if your unix machine will be a web server, proxy server or mail server it needs to have a DNS entry.

Any other machine only need an hosts file, the hosts file most an entry of the dns servers hostname and ip address.

Overall it make life easy if all unix servers have a DNS entry but only web servers, proxy servers and Mail servers really need a DNS entry.
# 3  
Old 10-22-2003
if you have a small network (~4 systems) you might as well just add them to your /etc/hosts file. however, if you already have a private DNS server running on your internal network, then yeah add everything in there. that helps to keep consistency in your network and you wont have to worry about one /etc/hosts being outdated.
# 4  
Old 10-23-2003
Bug

ok thanx guys
# 5  
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..

Previous Thread | Next Thread
Test Your Knowledge in Computers #356
Difficulty: Medium
ibfawk is a very small, function-only, reentrant, embeddable interpreter written in PHP.
True or False?

10 More Discussions You Might Find Interesting

1. 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

2. 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

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

Featured Tech Videos