Please Read | Server UDP attack

Please Read | Server UDP attack - Printable Version

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Please Read | Server UDP attack - -Davee- - 25.03.2009

Hey!

My server bumps into me on Linux (100/100mbit)
The server is attacked in the latter days UDP flood.
How is it possible to prevent this?
A firewall is switched on on the server.

UDP Flood: http://en.wikipedia.org/wiki/UDP_flood_attack

Re: Please Read | Server UDP attack - boylett - 25.03.2009

Block all port except the ones you need.

Re: Please Read | Server UDP attack - XeoN_13 - 25.03.2009

is it being attacked by alot of pc's or ips?or one.. if one u could ban the ip by using iptables

Код:

iptables -A INPUT -s <IP> -j DROP

then

Код:

service iptables save

Код:

service iptables restart

that most of the times stops udp flood , and i u dont know the IP ADDRES get TCPDUMP installed in ur linux machine

sorry for my bad english..

Re: Please Read | Server UDP attack - -Davee- - 25.03.2009

I don't see the ip.. On iptraf... :S
Boylett on the firewall blocked all ports only enabled the 7780 (use my samp server)

Re: Please Read | Server UDP attack - RoBo - 25.03.2009

sudo iptables -A INPUT -s 190.0.0.0/8 -j DROP
sudo iptables -A INPUT -s 200.0.0.0/8 -j DROP
sudo iptables -A INPUT -s 201.0.0.0/8 -j DROP

Re: Please Read | Server UDP attack - XeoN_13 - 25.03.2009

LOL! ban ranges for south america? :S

and dave.. u might whant to install TCPDUMP on ur linux vps or w/e. its really helpfull

then just use #tcpdump -n , and see the ip that floods

Re: Please Read | Server UDP attack - ReV. - 26.03.2009

As RoBo said if you know where the attacks are coming from use IP tables, try blocking all the ports besides the one that hosts you sa-mp server if you already haven't.

Re: Please Read | Server UDP attack - -Davee- - 26.03.2009

Witch is the best Firewall for linux?

Re: Please Read | Server UDP attack - boylett - 26.03.2009

Quote:

Originally Posted by d a v e E.

Witch is the best Firewall for linux?

The default one?