Solved

How to check if a domain is live even if PING is blocked?

Posted on 2004-09-17
3
333 Views
Last Modified: 2011-04-14
I have been using PING to check if a domain is live, however, some domains, depsite being available on port 80, are blocking PING.

       $response=shell_exec("ping $site -n -c 1 -w 2 -W 2");

I want a fast way of testing port 80, if it is live or not.  This must be an automated solution as it needs to be part of a script.
0
Comment
Question by:vincevincevince
3 Comments
 

Expert Comment

by:philipp999
ID: 12089033
Hi,

would this work? (needs netcat installed):
printf "GET / HTTP/1.0\n\n" | nc -w $timout $host $port | perl -pe 'if(m|^HTTP/1\.1 200 OK|) { print "OK\n"; } else { print "NOPE\n";} exit(1);'

best,

philipp
0
 
LVL 6

Accepted Solution

by:
blkline earned 100 total points
ID: 12090018
Perhaps something like:

wget -q -O /dev/null URL && echo "success"

or

wget -q -O /dev/null URL || echo "failure"

might fit the bill?  

URL can be ftp://  or http:// styles.

wget has quite a number of options from which to choose for timeouts and retries and such.

Barry
0
 
LVL 1

Author Comment

by:vincevincevince
ID: 12091172
Barry, that is just perfect, thanks :-)

You really deserve the points, I wish I had more to give
0

Featured Post

VMware Disaster Recovery and Data Protection

In this expert guide, you’ll learn about the components of a Modern Data Center. You will use cases for the value-added capabilities of Veeam®, including combining backup and replication for VMware disaster recovery and using replication for data center migration.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

This is the error message I got (CODE) Error caused by incompatible libmp3lame 3.98-2 with ffmpeg I've googled this error message and found out sometimes it attaches this note "can be treated with downgrade libmp3lame to version 3.97 or 3.98" …
Introduction We as admins face situation where we need to redirect websites to another. This may be required as a part of an upgrade keeping the old URL but website should be served from new URL. This document would brief you on different ways ca…
Learn how to get help with Linux/Unix bash shell commands. Use help to read help documents for built in bash shell commands.: Use man to interface with the online reference manuals for shell commands.: Use man to search man pages for unknown command…
Learn how to navigate the file tree with the shell. Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…

863 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now