Questions tagged [csf]

ConfigServer Security & Firewall

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CSF failed to Start after Ubuntu 20.04 upgrade from 18.04

Today I have upgraded my Ubuntu 18.04.04 VPS server to Ubuntu 20.04. Now CSF not starting and shows the following error and not start the CSF service. *Error* The path to iptables is either not set or ...
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49 views

Running docker containers only local behind csf firewall

I want to access docker containers only locally behind the csf firewall on a remote Ubuntu server. I changed the DOCKER settings options in /etc/csf/csf.conf to 1 to allow docker to change iptable ...
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21 views

Error with CSF on ubuntu / firewall

it turns out that on the PC of the "physical firewall" I have CSF installed to control all incoming traffic, and from there I route the ports to different applications located on other machines to the ...
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13 views

configure csf to ignore file names that include i360_blamer_reducer

I'm getting a LOT of lfd Suspicious File Alerts on files created by Imunify360. An example file is: /dev/shm/\i360_blamer_reducer423.u1009. Is there a way I can tell csf to ignore any file that has ...
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154 views

CSF WebUI not loading on default config with SSL certificate error?

Just installed the latest csf on my Debian 10 setup and it works fine, the Web-UI is however showing a connection refused error. Checking the lfd logs shows this error: Dec 15 12:15:04 xxxx lfd[6078]:...
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33 views

CWP: Preventing admin and user panel from brute force attacks

I have CWP installed on server, and configured User Login Security (login_security) settings like this: Active: Yes Failed Attempts: 3 Suspend For: 120 min Blocking by firewall: True I tested ...
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57 views

CSF/LFD: Firewall automatically disabling again and again

I have setup a droplet on Digital Ocean, and installed CentOS Web Panel. After the initial configuration, I've enabled CSF/LFD firewall. But it is automatically disabling, again and again. I have ...
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2answers
958 views

Brute Force attack in DirectAdmin

I have problem with brute force monitor in direct admin. Every minute i get info like this: 15705610210001 52.187.17.107 123 1 sshd4 Oct 8 20:56:24 server sshd[10817]: Failed password for ...
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1answer
195 views

Cloudflare behind site iptables not blocking HTTP and HTTPS ports

When the Fail2ban trigger an IP ban action, I want to block all the ports on my Ubuntu Server. Right now, I use banaction = iptables-allports and CSF. At this moment it only blocked SSH port, even if ...
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1answer
944 views

How to config CSF to allow postrouting in iptables for installing OpenVPN?

I am installing OpenVPN on my server and according to the tutorial I'm following I have to add the following line to iptables: iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE I add it and save ...
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1answer
311 views

Docker, csf and mariadb connection

I have a host with csf firewall allowing some external ports like ssh, http, https. I have now installed docker and mariadb through docker. I use docker run command with -p 6000:3306, so that means ...
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1answer
1k views

Block direct port 80 access on default IP using iptables?

I am using nginx with cloudflare in front of my sites to protect them from layer 7 attacks but now some attackers found this new way and they are daily attacking my default IP directly with layer 7 ...
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1answer
419 views

iptables shows a warning message but I am unable to solve it

When I typed this command in SSH to see rules, it returns the following warning message in iptables. I am wondering what is it and how to solve it. iptables -L LOG tcp -- anywhere ...
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1answer
1k views

FTP command line: Could not open data connection to port 48412: Connection timed out

I'm trying to send a file using ftp command line. It's working in my laptop by not in my vps server. ftp -v -n <<EOF open ftp.myserver.com user username password cd /folder/ put file.csv EOF I'...
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1answer
513 views

CSF firewall in EC2

I am a developer who has very limited knowledge of server administration; I learn as I go and mainly deal with web servers. Is a firewall like CSF needed on something like EC2 given that AWS already ...
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2answers
389 views

Defending from random GET requests

I am getting attacked, and my site is constantly receiving thousands of requests like this GET /?HMPCL=INQUVOBHZ HTTP/1.1 I have mod-security installed, waf comodo and csf. Even mod-security blocks ...
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1answer
2k views

How to block a small IP range in csf

I'm looking for a way to block a small ip range in csf, e.g. 151.80.31.103 to 151.80.31.115 I know how to block each ip by issuing a cmmand csf -d IP, but it is a lot more effective to have a way to ...
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1answer
1k views

IP addresses denied in /etc/hosts.allow appear in /etc/csf/csf.deny?

I modify my /etc/hosts.allow file as sshd : 192.168.0.0/255.255.255.0 : allow sshd : xxx.xxx.xxx.* : allow sshd : ALL : deny (where the xxx represent my actual IP address numbers and the wildcard * ...
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0answers
163 views

CSF integrated UI stops working after few minutes

I have a Centos web server without any control panel like cPanel I've installed CSF/LFD and I've configured it to enable the integrated UI It was working fine using port 6666, but after few minutes ...
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1answer
266 views

Is it possible to open a CSF-LFD closed port without attaching an IP to it?

CSF-LFD blocks nearly all open ports. It also blocks port 10000 which I need. I can open the port via a similar code: cat << EOF >> /etc/csf/csf.conf tcp|in|d=10000|s=aa.bb.cc.dd EOF ...
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1answer
303 views

/usr/sbin/amavisd-new - why is pcmd/regex not working for this command in csf.pignore?

For some reason I cannot get CSF's LFD (/etc/csf/csf.pignore) to ignore amavisd-new running via perl. The daemon runs via /usr/bin/perl /usr/sbin/amavisd-new (some mode) however it seems that when I ...
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0answers
568 views

LFD is unable to download blocklist RBN, cannot remove it from config

I set up CSF on my cPanel installation to help manage the firewall and provide brute-force protection. One of the features of CSF (Actually LFD, which comes included) is the ability to block IP ...
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1answer
381 views

pptp gre in csf firewall

i have a senior problem. when i want to connecting a pptp over a tap adaptor or a pptp connection have get disconnected and get this errors on messages logs: linux pptpd[20275]: GRE: read(fd=7,buffer=...
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1answer
433 views

limiting ip range on openvpn server

We're trying to setup a openvpn server on centos 6. We have blocked all IP adresses except a couple in a whitelist via /etc/hosts.deny, also we did the same with csf.deny (except for the whitelist). ...
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1answer
156 views

CSF Firewall unblock countries

I've a VPS Server running CENTOS 6.7 x86_64 with CSF Firewall activated. Sometimes I see in "Firewall Deny IPs" that blocks suddenly connections from my country (Spain) to some of my clients. Not ...
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1answer
223 views

Why is lfd prematurely removing blocks?

As you can see in the excerpted log file below (from /var/log/lfd.log), lfd is prematurely removing temporary blocks that it imposes on IPs: Apr 7 13:07:59 host lfd[32117]: (wordpressxmlrpc) Request ...
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1answer
1k views

How does CT_LIMIT (the csf firewall setting) work?

I've been wondering if the csf firewall counts the connections for the last CT_INTERVAL seconds and then compares them to the CT_LIMIT value, or it just counts the current (at the moment) connections ...
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2answers
691 views

Haproxy logging doesn't work. Does that have anything to do with csf?

Does Haproxy log every time a connection is made? I have followed instructions from other threads to set up logging via rsyslogd. Even though the files are created (haproxy.log,haproxy-info.log and ...
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0answers
1k views

CSF+LFD not blocking brute force on xmlrpc.php on Wordpress site

I have just installed csf+lfd on my rackspace cloud server (a vanilla LAMP stack running centos 6.7). I only tweaked a couple of settings in the default csf.conf file: the ports allowed in TCP_IN and ...
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1answer
3k views

How to block all IPs in CSF except few static IPs?

The title is telling I guess. I'm wondering how to block ALL IPs in csf.deny except few trusted IPs? I've googled but could not find the answer.
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60 views

CSF ignore list skips some ignore exclusions

I have try to prevent sending Suspicious File Alert emails which contain: File: /tmp/netatop-0.5/netatop.init Reason: Script, starts with #! File: /tmp/netatop-0.5/mkversion Reason: Script, ...
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1answer
514 views

How to block all traffic which is headed to a particular domain

I have recently added an IP address to my VPS. The problem is that the previous owner has abandoned the domain name with its nameservers set on this IP. Although any access to this domain is denied by ...
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524 views

exim queue notification if a domain is sending more than x number of emails

I am running Exim as an MTA. I have also implemented a Per hour Per domain email Limit. Still I see that my IP reputation goes bad if a spammer sends more than x amount of emails in 24 hours or so. I ...
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1answer
215 views

I cannot block an IP [closed]

I have a redirect rule on my CSF like the below; 17.1.1.13|80|27.5.5.22|80|tcp 17.1.1.13 is my firewall(csf) and 27.5.5.22 is my web server address. So everybody access my web site through the ...
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1answer
712 views

Can't connect to Ubuntu VPS via SSH,SFTP

When I try to login to my VPS using SSH and SFTP it's not connect to the server. Then I power off and power on the VPS by the VPS provider control panel (digital ocean). Once it boot up, first few ...
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1answer
990 views

How do I use CSF to redirect domain requests to a port?

I have a server setup that uses two different webservers with different subdomains. Right now the servers listen on different ports (80 & 4000) So users don't have to put in :4000 I'd like to ...
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1answer
573 views

CSF not adding IPs to deny file as a cron during high loads

I'm running a cron every minute to thwart brute-force attacks. awk '{print $2}' < ipkill.txt | while read ip; do #query geographical info IP address curl -o country.txt ipinfo.io/$ip ...
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1answer
276 views

IPTables Rules Being Loaded From Somewhere

I'm having troubles connecting (meaning I can't connect to any IP or port) to my server and it appears that the problem was to do with CSF. I uninstalled CSF (by running /etc/csf/uninstall.sh) and ...
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1answer
644 views

CSF Update resets IPTables rules

This is with CentOS 6. On one of my servers, periodically all IPTables rules are simply dropped and all connections start being blocked. It happens fairly randomly once every few days. I have a script ...
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1k views

CSF does not open port

I'm having a Ubuntu 14.04 server which has a TomCat installation listening on port 8080. I installed CSF today. Following is netstat -tulpn tcp6 0 0 :::8080 :::* ...
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1answer
5k views

CSF *Port Scan* detected - shared hosting [closed]

We modified a few options in ConfigServer Firewall configuraion. Ever since the CSF blocking a lot of IP address. Following print sreen: http://oi60.tinypic.com/kdlnh3.jpg What can I modify thereto ...
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1answer
1k views

Filezilla can not connect my new ftp port on centos 6.6

I have a webserver running on Centos 6.6. Recently Config Server Security Firewall send me over 150 email about some malicious bots trying to guess my clients ftp users and passwords. I hate ...
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1answer
4k views

Unblock All Ports in CSF? [closed]

I have CSF installed on a cPanel server and know that I believe that I can unblock ports specifically for outgoing connections in the /etc/csf/csf.conf file. It looks like this line can just be ...
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1answer
839 views

Suspicious Linux binary file in /tmp/ - Munin?

I have a CENTOS 6.6 x86_64 server running ConfigServer Firewall (installed by us) and Munin (installed by the datacentre). CSF has recently (and for no apparent reason) started sending us warnings, ...
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1answer
259 views

CentOS - how to tell what conf file CSF (firewall) is using? csf.conf then restart not updating [closed]

in /etc/csf/csf.conf the following is setup LF_CPANEL = "5" LF_CPANEL_PERM = "3600" restarting csf by doing the following csf -r does not seem to have an impact on the above attributes. According ...
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2answers
114 views

Can't block spammy IP

I'm being attacked by 37.59.4.76. It's sending me a great amount of data, which is destroying my dataplan. I've added the iptables Chain num pkts bytes target prot opt in out ...
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0answers
169 views

CSF Configuration Ignore NodeJS for Excessive Time

I am getting a lot of these: Excessive resource usage: *account* (9580 (Parent PID:9574)) Time: Sat Oct 18 15:20:00 2014 -0400 Account: *account* Resource: Process Time Exceeded: ...
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2answers
2k views

NUMIPTENT is too low to add 5333 rules (CSF firewall error)

The VPS iptables rule limit (numiptent) is too low to add 5333 rules (19469/24000) CSF stopped working spontaneously today. Saying it can't start because it can't add 5333 rules to an apparent total ...
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1answer
4k views

csf Integrated User Interface not working

I've installed CSF on ubuntu 14.04 using their official install guide. After disabling UFW with the following command: sudo ufw disable then I have modified csf.conf with the following values: (...
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1answer
100 views

cannot send emails to other Web servers

I'm trying to limit my server's open ports in CSF. The IPv4 port settings include: # Allow incoming TCP ports TCP_IN = "22,25,53,80,110,143,443,587,3654,53343” # Allow outgoing TCP ports TCP_OUT = "...