ConfigServer Community Forum

Dear Sir,

I have installed CSF firewall on Centos Stream 9 on my VPS server successfully without errors.

However, after I set some IP ranges in this file:

$ vi /etc/csf/csf.allow

like:

###############################################################################
# Copyright 2006-2018, Way to the Web Limited
# URL:
# Email: sales@waytotheweb.com...

I'm clueless on what this means:
*ERROR* IPSET:
and what is to be done about it.

Alma Linux
csf v14.20

Appreciate some guidance.

thank you all!

Hello!

I have a problem if csf enable.
for example:

CSF ENABLE

dig @8.8.8.8 ns1.besthost.az

; > DiG 9.18.18-0ubuntu0.22.04.2-Ubuntu > @8.8.8.8 ns1.besthost.az
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER > DiG 9.18.18-0ubuntu0.22.04.2-Ubuntu > @8.8.8.8 ns1.besthost.az
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER > DiG...

We received this notice from Maxmind and would like to know how it affects us using CSF?

As of Wednesday, May 1, 2024, we will use R2 presigned URLs for all database downloads in order to increase the security and reliability of our services.

This is a potential breaking change. Please ensure that your servers can make HTTPS connections to the following hostname:...

Hello, I am a new CSF user. I am using Almalinux 8.9 and cpanel. I have successfully installed CSF. But I couldn't achieve my main goal.

I want to block all requests coming directly to my server's ip address. But I want to allow 3-4 ip addresses.
I allowed my own ip addresses in the CSF interface. And I entered 0.0.0.0.0/0 in the Deny field to block all other traffic. but this time the traffic...

Seems this month Maxmind is enforcing it's API rate limits

Please note: Beginning in March 2024, MaxMind will begin enforcing its policies around API requests and endpoints. We will require use of the HTTPS protocol for all database download requests, and will require requests to use the proper hostname as listed below, and on our Developer Portal.

For my API downloads I now get too many...

Hello!
Recently i've been facing a problem in multiple server, when you add an ip to csf.allow on the UI it'll be added to the chain normally until you restart csf and lfd.
After the restart most of the ips on csf.allow won't be on the allow chain, if I remove them and add again it'll be added until the next restart;
The search option identify the ip on csf.allow but won't find it on the allow...

Hi,
I have setup CSF on our server but we're facing some troubles with too many IPs being blacklisted.
Many IPs that our clients access their e-mail from (dynamic ip ranges) are getting listed in Spamhaus, and thus CSF is blocking their connection to the server. I've checked csf.blocklists file but every RBL entry there is commented, so it shouldn't be affecting this, right? Anyway, i tried...

Good morning,

We currently have a custom blocklist and we managed to implement a webui for asking an unblock. But as the blocklist can only be reloaded each 3600s, the user have to wait a maximum time of 3600s to get unblocked.

Is there a way to trigger a blocklist reload within CSF/LFD from SSH? In this way we'll be able to unblock instantly an user.

Hello,

I run CSF on a cPanel server. CSF has MaxMind GeoLite2 Country Database MM_LICENSE_KEY and CC_SRC = 1 set and working ok. Example:

csf -i 66.165.246.164
66.165.246.164 (US/United States/waytotheweb.com)

I use CC_ALLOW option to add a couple of countries I want to whitelist but the problem is I'm still getting those countries IPs blocked (in temporary block list).

Now I created a...

Hello,

After upgrading to Rocky Linux and latest cPanel install, they wont allow Host Access Control anymore. So, I am trying to block all SSH connection except allow IP in the hosts.allow:

=============================
ALL : 1.1.1.1 : allow
sshd : 1.2.3.4 : allow
sshd : ALL : deny
=============================

What rule in the CSF can be defined to achieve the above SSH to block all incoming...

I am a victim of (D)DoS attacks for at least 2 years now from a very persistent attacker. The attacks are coming from spoofed IPs and the attacks are so low that it isn't distinguishable from normal traffic according to my provider (Hetzner).
CSF is able to detect them and block it according to the logs from what I can see in the /var/log/syslog file as the attacking IPs are there. Yet CSF is not...

On March 22, I discovered that SOME emails to users on my server were being returned to senders. Some were definitely coming through, but some weren't. I ended up having to disable CSF, at which time hundreds of emails started to come in.

This problem didn't happen on March 21, so it was a new issue after I hadn't changed anything. So it had to be something automated.

These IPs were in my Temp...

Hi everyone,

I'm having problems with PID.
Every hour I receive emails telling me:

Excessive resource usage
Resource: Process Time
Exceeded: 81271 > 5000 (seconds)
Executable: /usr/lib/systemd/systemd
Command Line: (sd-pam)
PID: 908897 (Parent PID:908891)
Killed: No

I get emails like this about lots of other PIDs. I've already tried to kill them or increase the duration of the PIDs in my...

Hello everyone, I hope you are well!
I've been having problems with CSF for a few months, even though it's the only firewall working on a cPanel server, when using the rules below:

tcp,udp|in,out|d=2087|d=0.0.0.0/0
tcp,udp|in,out|d=2087|d=::/0
tcp,udp|in,out|d=2086|d=0.0.0.0/0
tcp,udp|in,out|d=2086|d=::/0
tcp,udp|in,out|d=2084|d=0.0.0.0/0
tcp,udp|in,out|d=2084|d=::/0...

So I turned on PT_All_Users option check and started getting excessive usages warning emails:

Time: Sun Mar 17 13:36:39 2024 -0500
Account: mailman
Resource: Process Time
Exceeded: 3155 > 1800 (seconds)
Executable: /usr/local/cpanel/3rdparty/python/2.7/bin/python2.7
Command Line: /usr/local/cpanel/3rdparty/bin/python2 /usr/local/cpanel/3rdparty/mailman/bin/qrunner --runner=CommandRunner:0:1 -s...

We just ran updates on servers and now on multiple servers I have seen this issue. Customers are having issues connecting to ports that are only available with whitelisting. When I check IP's I see this

csf -g XXX.XXX.XXX.XXX

Table Chain num pkts bytes target prot opt in out source destination
No matches found for XXX.XXX.XXX.XXX in iptables

ip6tables:

Table Chain num pkts bytes target prot...

Every once in awhile, something on my server will get hung up and cause a temporary load spike up to about 10. And then every once in a blue moon, something will REALLY get hung up and cause a load spike up to 100!

I've always had CSF to email me when the load is over 6:

PT_LOAD = 30
PT_LOAD_AVG = 5
PT_LOAD_LEVEL = 6
PT_LOAD_SKIP = 3600

I'd like to keep that in place, but I'd also like to use...

I'm running CentOS v7.9.2009 with WHM/cPanel. I use Cloudflare and CSF with the Cloudflare extension.

A few weeks ago, my sites started throwing intermittent Cloudflare 520 errors. The server load was fine and there was nothing in the Cloudflare logs, but I saw tons of these in /var/log/messages:

Feb 5 20:12:08 xxxx kernel: Firewall: ICMP_IN Blocked IN=venet0 OUT= MAC= SRC=13.234.35.125...

I really much appreciated and want to thank you for the implementation of iptables-nft support.

As CPanel's Host Access Control dialogue on Rocky Linux 9.2 and WHM 114 showed errors I solved that by removing firewalld and installing iptables-nft. CSF and Host Access Control both work now without problems.

While reading about nftables I stumbled about the following Redhat documentation stating...