Since the Search function has been disabled on this forum, I'm posting this question instead of doing a search for the information.

I'm looking for comments and recommendations on "Web Server Monitors" that are some what reliable and cost effective. I need the ability to monitor multiple web sites and ports (HTTP, FTP..).

Any information would be greatly appreciated.

www.alertra.com are good :)

alertra costs money.

nPulse is free:

nPulse (http://www.horsburgh.com/h_npulse.html)

I've been using for a while now and it does exactly what i want to do. It's from the makers of nmap so it's stable. I monitor whole class c's with this and it has no problems. Definetly worth trying.

Thanks for the info on Alertra & nPulse.

I did look at Alertra. It seems be be a good service, but if I want to monitor a lot of sites, it would get rather expensive rather quickly.

I also looked at nPulse. I like the price, but if it's running on a Linux box, could I still monitor multiple sites (Linux & NT)?

http://ipsentry.com/

-Brendan

nPulse isnt from the makers of nmap(fyodoor - insecure.org/nmap) ). It just uses nmap as a backend :)
Dont give them false credit:)

but if it's running on a Linux box, could I still monitor multiple sites (Linux & NT)?

yes. nPulse is compatible with dozens of OS's, including IOS and HP-UX.

www.siteuptime.com is another free one, seems ok so far.

www.easymonitor.com

http://www.webwatchbot.com

We use http://www.hyperspin.com - we have been extremely happy with their services.