Nmap Takes Server "down" And Then Crashes

[carloss]

I just started an (ze)nmap scan on my vServer.

On it is a teamspeak 3 Server, apache, ftp, postfix, mysql, ISPconfig etc Running.

Problem is the Server whent down while i did the scan.

I started an "Intense Scan" and later a "quick scan plus"

nmap -T4 -A -v -PE -PS22,25,80 -PA21,23,80,3389 IP

and

nmap -sV -T4 -O -F --version-light IP

WHile I did the scans the webinterface, teamspeak ...everything....did not respond anymore!

And nmap crashed both times.

So an nmap scan on my server is a denial of service! o_O

Why is that so?

What can I do against it?

I installed everything except of the teamspeak Server two days ago...

Sorry for my bad English Im from the "Jasager" Country XD

[Sparda]

Where is your server hosted (as in connection speed etc.)?

What OS is it running?

Also, I suspect it might be your computer that is DOS'ed by nmap performing the scan, which would explain why nmap crashes. You should try this again but instead of trying to access the server from the computer that is running nmap use a different computer.

[operat0r_001]

nmap can be a very dangerous tool .... just connect port scanning can bring embedded and other shitcan devices down for the count .. and even create permanent problems ...