Plesk Linux SYN Flood Nasıl Önlerim

Merhaba;

Saldırı yapan ipler:
85.108.174.175:1735
85.101.36.58:1953


Plesk te bu ipleri nasıl bloklarım





# netstat -n|grep :80
tcp 0 0 89.19.5.60:80 85.101.36.58:3155 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:2388 ESTABLISHED
tcp 0 0 89.19.5.60:80 81.214.247.9:1802 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:4169 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:2636 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:2673 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:3696 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:3191 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:2321 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:2581 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:3612 ESTABLISHED
tcp 0 0 89.19.5.60:80 81.214.247.9:1363 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:2819 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:4356 ESTABLISHED
tcp 0 0 89.19.5.60:80 81.214.247.9:1381 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:2367 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:3111 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:3626 ESTABLISHED
tcp 0 0 89.19.5.60:80 81.214.247.9:1153 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.100.115.119:3790 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:4311 ESTABLISHED
tcp 0 0 89.19.5.60:80 81.214.247.9:1925 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:2780 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:2753 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.100.115.119:3792 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:3534 ESTABLISHED
tcp 0 0 89.19.5.60:80 81.214.247.9:3745 ESTABLISHED
tcp 0 0 89.19.5.60:80 81.214.247.9:1196 ESTABLISHED
tcp 0 0 89.19.5.60:80 81.214.247.9:3767 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:3731 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:2709 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:3221 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:4233 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:2440 ESTABLISHED
tcp 0 0 89.19.5.60:80 81.214.247.9:4577 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:2473 ESTABLISHED
tcp 0 0 89.19.5.60:80 85.101.36.58:2475 ESTABLISHED




ip tables komutu ile olmuyor...

iptables -A INPUT -s 85.101.36.58 -j DROP
modprobe: Can't open dependencies file /lib/modules/2.6.17-11-server/modules.dep (No such file or directory)
iptables v1.2.11: can't initialize iptables table `filter': Permission denied (you must be root)
Perhaps iptables or your kernel needs to be upgraded.

Büyük olasılıkla kullandığınız sunucu VPS , eğer xen ise iptables support'u yok bildiğim kadarıyla.
O nedenle iptables kullanan firewallları yada iptables'ı kullanamazsınız.

VPS'in ana sunucusundan bu blocklamayı yapmalarnı isteyebilirsiniz , yada iptables kullanmayan firewall çözümlerine bakabilirsiniz.

http://www.fx.dk/