Lot of http/1.1 connections from Server Main IP

[Vs Nu]

1-0	18721	0/1/1	_	0.44	100	4	8	0.0	0.01	0.01	Server Main IP	http/1.1
1-0	18721	0/2/2	_	0.41	100	21	672	0.0	0.01	0.01	Server Main IP	http/1.1
1-0	18721	0/2/2	_	0.44	100	348	354	0.0	0.12	0.12	Server Main IP	http/1.1
1-0	18721	0/2/2	_	0.46	100	284	1797	0.0	0.04	0.04	Server Main IP	http/1.1
1-0	18721	0/2/2	_	0.42	100	17	1245	0.0	0.04	0.04	Server Main IP	http/1.1
1-0	18721	0/2/2	_	0.44	100	6	814	0.0	0.10	0.10	Server Main IP	http/1.1
1-0	18721	0/1/1	_	0.31	100	225	451	0.0	0.01	0.01	Server Main IP	http/1.1
1-0	18721	0/2/2	_	0.42	100	5	443	0.0	0.01	0.01	Server Main IP	http/1.1
1-0	18721	0/2/2	_	0.18	100	586	1174	0.0	0.03	0.03	Server Main IP	http/1.1
1-0	18721	0/2/2	_	0.44	100	1	2210	0.0	0.03	0.03	Server Main IP	http/1.1

I had checked the cloudflare Security page it shows the server is under attack Top Threat type : Bad browser

Screenshot

Captured with Lightshot

prnt.sc

Screenshot

Captured with Lightshot

prnt.sc

How to block such attacks by CSF

 

[cPJustinD]

Hey there! Please note that server security and attack mitigation are not services offered by cPanel and, as such, we can only provide limited observational support for those issues. cPanel does not offer a firewall interface and does not support the server's firewall in any way.

With that being said, we have published the following articles that may help against similar issues such as DDoS attacks:

How can I tell if Apache is experiencing a DDoS attack?

Question How can I tell if Apache is experiencing a DDoS (Distributed Denial-of-Service) attack? Answer If Apache is experiencing a DDoS attack, you may notice that your server's Web sites are ti...

support.cpanel.net

What should I do if my server is experiencing DDOS?

Question What should I do if my server is experiencing DDOS? Answer If you are experiencing a real DDoS (from multiple IPs), you should communicate with your data center or hosting provider, as t...

support.cpanel.net

If you do not have such an administrator, you may search for one in our listings here:

System Administration Services

Please note, however, that cPanel, LLC does not endorse or recommend any particular provider on that list, nor can we be held liable for any services performed by third-party providers, including those on the list.