Visit The New, Modern Unix Linux Community


Which lookup tool query both hosts and DNS server?


 
Thread Tools Search this Thread
Operating Systems Solaris Which lookup tool query both hosts and DNS server?
# 1  
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 decent tool to do the job,any other ideas?
# 2  
Neither ping nor traceroute query the host you're trying to reach, they too use DNS to resolve the name to an IP.
# 3  
Try this:
Code:
#! /usr/bin/perl

printf "%s\n", @ARGV[0];
($name, $aliases, $addrtype, $length, @addrs) = gethostbyname(@ARGV[0]);
foreach $addr (@addrs) {
        ($b1,$b2,$b3,$b4) = unpack('C4',$addr);
        printf "%d.%d.%d.%d \n", $b1,$b2,$b3,$b4;
}
exit 0;

# 4  
getent hosts [hostname]

This will query whatever name resolution you have configured in /etc/nsswitch.conf. ie:

getent hosts mybox

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #409
Difficulty: Medium
XENIX is a discontinued version of the UNIX operating system for various microcomputer platforms, licensed by Microsoft from AT&T Corporation in the late 1970s.
True or False?

10 More Discussions You Might Find Interesting

1. What is on Your Mind?

DNS Lookup Tool Using DIG

Hi. Having a bit of quick fun putting some networking tools online. Here is a DNS Lookup tool. It's basically the DIG command line tool wrapped in forum formatting. If you want more features, please post here. I'm doing to make a few more network tools like this and move on to other... (1 Reply)
Discussion started by: Neo
1 Replies

2. 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

3. Red Hat

DNS reverse lookup issue

Hi guys. Ok so let me lay out my configs. I can do a NSlookup from client to server BUT NOT a reverse lookup. DNS server: Optimus.jaydomain.com IP : 192.168.1.50 DNS Client: Megatron.jaydomain.com IP : 192.168.1.60 On Sever: # cat /etc/named.conf // // named.conf // // Provided... (4 Replies)
Discussion started by: Junaid Subhani
4 Replies

4. Solaris

DNS Lookup failure:

I am facing typical problem with apache as proxy. my solaris box was running with apache1.3, due to security issue i have updated to apache 2.2. I don't have any DNS set up onmy network. I was able to connect to internet apache 1.3 working as proxy server. http and https are working fine. when... (3 Replies)
Discussion started by: sns_sns
3 Replies

5. UNIX for Dummies Questions & Answers

Checking for unix hosts that do not have reverse lookup

Hi there i am not sure how to explain my problem. i need to run a script to give me the results of all my unix hosts that do not have reverse lookup activated (for lack of a better word), i need to give this to out Server guys to add it part of the AD rules. So what i need is a script to... (0 Replies)
Discussion started by: brian112
0 Replies

6. Programming

How to set DNS lookup type for getaddrinfo()?

Hi there, I'm trying to do an MX type lookup using getaddrinfo(), but I can't work out how to change the lookup type to MX from the standard A - can anybody tell me how to do this? Thanks very much John G (3 Replies)
Discussion started by: JohnGraham
3 Replies

7. AIX

prevent sendmail do DNS lookup

Hello! How do I prevent AIX sendmail from doing a DNS lookup prior sending the mail? (we still need to have the DNS resolving on AIX level). We are running AIX 6.1 and 5.3. //sap4ever (1 Reply)
Discussion started by: sap4ever
1 Replies

8. UNIX for Advanced & Expert Users

[DNS] Reverse Lookup for 2 IP Addresses

Originally I had the server at home and on Comcast so I used dyndns.org for DNS. Once the server got a bit more popular, I leased a server at a colo facility. They set up the server name in their DNS so I didn't really have any reason to manage my own DNS. DynDNS was managing the domains and I... (7 Replies)
Discussion started by: BOFH
7 Replies

9. 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

10. IP Networking

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 (4 Replies)
Discussion started by: rmuhammad
4 Replies

Featured Tech Videos