Trash (Linux) Firewall
(Linux) Firewall
Poll| I agree. | 62.50% (10) | |
| I disagree. | 25.00% (4) | |
| Doesn't have opinion. | 12.50% (2) |
Evaldas: I don't think that it is possible to only receive the header of a UDP packet. You will always receive the entire packet. A firewall on the server itself can't change this. It can only tell your system to discard the packet AFTER receiving it. The bandwidth is gone anyway. 
lennon If you don't use firewall your server will go down from few bytes flood. Evaldas: You're partially true but not just that. Majority of people here host their servers with the VPS and such attacks like (D)DoS attacks, it could damage your VPS. Of course this depend on how the strong the attack it is. 
iptables -A INPUT -p UDP --dport 7 -j DROP
iptables -A INPUT -p UDP --dport 19 -j DROP
iptables -A INPUT -p UDP -f -j DROP
iptables -P INPUT DROP iptables -P FORWARD DROP iptables -A INPUT -m state --state INVALID -j DROP
iptables -P INPUT --source unrealsoftware.de -j ACCEPT iptables -A INPUT -p udp --dport 36963 --sport 20000-50000 -j ACCEPT
iptables -A INPUT -p udp --sport 53 -j ACCEPT iptables -A INPUT -p tcp --sport 80 -j ACCEPT iptables -A INPUT -p tcp --sport 443 -j ACCEPT
iptables -A INPUT -p tcp --sport 22 -j ACCEPT
dstat --net --socket --cpu
ead then server shut down stopped, i recomended 
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