0
votes
1answer
469 views

Ubuntu Server DDoS protection [duplicate]

I've seen many articles on DDoS protection, but none work. I need protection for a socket server i'm running on the server. It's running on port 9876 and it's for a flash-based game. when it gets ...
-4
votes
3answers
1k views

Not using SSH Pubkey Authentication is really serious security flaw compare to regular Password Authentication

How would using PubkeyAuthentication would be more secure than using PasswordAuthentication, considering the following facts: Default SSH port is moved from its default Firewall blacklists an IP ...
1
vote
0answers
130 views

CSF: Changing portflood settings to deny IP longer than second interval?

I've recently been under attack and I'm configuring CSF firewall for my Ubuntu server (latest). I found out portflood settings only block the ip for the specified second count, but I would like ...
1
vote
3answers
1k views

How do I secure my OpenVZ host node?

I'm running a server using OpenVZ for a few websites. Nothing in HN except for sshd. A VM for Varnish, a VM for MySQL and a few VMs each for one website (running Apache/PHP). Now I'd like to secure ...
0
votes
1answer
270 views

Allow IP range through linux firewall

I need to set up a rule to allow ALL outgoing UDP connections on my VPS. I am not sure what I should be using. I have tried: udp:out:d=1_9000:d=* in my csf.allow but its not working (and it was a ...
1
vote
2answers
525 views

How much of a linux security problem is “IP spoofing”?

I am using ConfigServer Security & Firewall (CSF) to limit port access to whitelist IP addresses. However I have heard that IP addresses can be spoofed. How wide-spread is this problem, and is it ...