Hello,

on server i have config server firewall and iptables. I would like server to be safe from basic UDP flood and any port attack flood.
http://img703.imageshack.us/img703/3935/35039950.png
https://1.bp.blogspot.com/-rDgZndKmy...s1600/ddos.png

So i want to ask if you can advice on which setting to lookup or which software to use?

Example CSF mentioned above has this option:
I have port 22 and 80 protected, but not sure if others are vulnerable to this attack.

will this really protect me from these basic non distributed flood attacks or what do you recommend?

well, dos\ddos protection means you need a way to mitigate the issue, not only at host level but at network level too. thus many people are turning to services like Arbor and DOSarrest. however, if its a host on a network you dont control then the mitigation tactic at host level might save host from port exhaustion (or other issues like too many sockets in time_wait state), but this is not true dos\ddos protection.

and yes, what you posted is basic form of protecting the service port from sequential fast connections. not sure if its src IP based or not..... and depending on the thresholds you could inadvertently deny legit connections, etc.