Thank you R.Gunter, I know what is a Ddos. Normally are doit over a service. Then over this port. (Email, web, ftp, sshd....). Some times over more than one service then over more than one port.
A little script for help to detect login failed or force brute over your robust sending a alert email . ------------------------------------------------ #!/bin/bash string="Login failed for" tail -n 0 -F /home/opensim/robust.log | \ while read LINE do echo "$LINE" | grep -q $string if [ $? = 0 ] then echo -e "$string found in robust.log on $HOSTNAME" | mail -s "Alguien intenta acceder a $(hostname)" [email protected] fi done ---------------------------------------------- Must be running in a screen or with nohub nohup ./scriptnombre.sh 0<&- &>/dev/null & Regards, Luisillo 2014-05-31 12:25 GMT+02:00 R.Gunther <[email protected]>: > DDos have nothing todo with ports or services. DDos is very hard to defend. > You just get so much traffic that the server / services get overloaded and > stop working correctly. > Only way to defend against Dos is sofar i knows blocking IP (ranges) with > the risk you block customers to. > > > On 2014-05-31 11:28, Luisillo Contepomi wrote: >> >> We are now in the 0.8 version.. I think the time to talk about >> security has come. >> >> This days we can read about a Ddos over Aviworlds >> >> http://www.hypergridbusiness.com/2014/05/aviworlds-shuts-down-again-after-attack/ >> >> Anyone know what kind of attack was? over what ports or services? Was >> really a Ddos? >> >> I think it would be very interesting for all us to open a serious >> debate on the safety of our regions. We must start to talk about >> OpenSimulator security. >> >> Regards >> Luisillo >> _______________________________________________ >> Opensim-users mailing list >> [email protected] >> http://opensimulator.org/cgi-bin/mailman/listinfo/opensim-users >> > > _______________________________________________ > Opensim-users mailing list > [email protected] > http://opensimulator.org/cgi-bin/mailman/listinfo/opensim-users _______________________________________________ Opensim-users mailing list [email protected] http://opensimulator.org/cgi-bin/mailman/listinfo/opensim-users
