ConfigServer Security & Firewall

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1answer
9 views

CSF Blocking IP on Fail POP3 and cPanel

I have a VPS with cPanel and i am running around 400+ email accounts under a Office Network, I don't have STATIC IP but i am facing issue when any 1 of employee forget the password and try to access ...
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0answers
17 views

Transmission And CSF on debian

I'm running transmission and csf on a VPS, I can access the transmission web-ui thru port 9091. Problem is it doesn't download anything when i enable csf, I allowed port 51413, 49152:65535 on TCP_IN ...
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1answer
40 views

Cpanel + CSF + suPHP = no php brute force protection?

I have NOT found anyone else talking about brute force detection in CSF with suPHP enabled. Maybe I'm not seeing the real picture or need but it feels that suPHP is weak at brute force detection. Is ...
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1answer
68 views

Cannot close Port 25 after installing postfix

Before installing logwatch (which installs postfix) on Ubuntu 12.04, the port 25 is blocked by iptables/csf PORT STATE SERVICE 25/tcp filtered smtp After installing logwatch (which installs ...
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34 views

new attacks from banned IPs in CSF

I have many blocked IPs in csf with "do not delete" comment. But every day I got notifications from server about new brute force attacks via some of these IPs. When I want to add the attacker IP to ...
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66 views

How to set csf to block brute force attacker's IP beside DirectAdmin settings?

I have a VPS with CentOS, DirectAdmin and CSF. This is what I have set in DirectAdmin: But as I talked with DirectAdmin support team, when CSF is installed on the server, these settings don't ...
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1answer
38 views

WHM/CSF disregard failed logins to cpanel/webmail etc from certain country ?

Anyone knows if it's possible to disregard failed logins to certain services in WHM/CSF by country ? e.g. I would like that users that are accessing server from my country, don't get banned if they ...
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1answer
37 views

csf stop emails related to Process Tracking

I have enabled LSF with CSF since I would like to receive some informations but I am being bombed by the CSF with similar emails: Subject: lfd on [Hostname]: Excessive resource usage: www-data ...
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1answer
58 views

How to block/ban clients that try to access some paths / urls?

Some spambots hammer my server with nonexisting paths like /user/pass?=asdfdasfas How could I block any access to /user/pass?=* ? Is there a better tool than iptables or csf for catching such crap?
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1answer
118 views

Port forwarding through OpenVPN server

Here's my scenario: Remote OpenVPN server v2.3.2, 1 public IP, CentOS 6.4, 2.6.32-042stab079.6 Tunnelblick (OpenVPN client) What I want to do is route all the client traffic through the VPN - and ...
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292 views

Is CSF's recommended Connection Tracking Limit (CT_LIMIT) of 300 connections reasonable?

CSF recommends setting CT_LIMIT to 300 to block small ddos attacks as per http://configserver.com/free/csf/readme.txt I Would like to enable this connection limiting / tracking via CSF, as I have ...
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1answer
194 views

Proxmox 31 + KVM routing + IP subnet + csf

We have proxmox 3.1 server in netzner with routuing network and IP subnet block. We want to implement csf firewall without interfering the traffic of the KVM VMs, what would be the easiest way? We ...
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1answer
121 views

ConfigServer CSF and iptables config

I'm aware there is a /etc/sysconfig/iptables file, with rules for iptables (and what's the effective difference with /etc/sysconfig/iptables-config?). I installed CSF & LFD. You can configure ...
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0answers
67 views

Extract IPs from exim_rejectlog with particular error then automatically add IP to a csf or iptable

Is there a command to do this in linux? For example extract IPs from exim_rejectlog with particular error dropped: too many syntax or protocol errors Count how many times an IP is listed and if it ...
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1answer
76 views

Memcached ports and CSF

I've got a small / medium sized VPS powered by WHM and running a few personal websites alongside a Magento powered web-store. Not being a real expert when it comes to server configuration details I've ...
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1answer
80 views

Mail Authentication Randomly Failing

This started about 4 days ago on a production server. Clients started getting random incorrect password dialog boxes in their email programs, most use Outlook. This happens for email addresses on all ...
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1answer
541 views

Hacking attempt detected, Can we block user by PC-Name

Recently we notied that hackers are trying to hack our server, we have IP blocking softwares installed on our server but the thing is that, hacker is using dynamic ip addresses to try again and ...
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1answer
354 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 ...
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1answer
146 views

Open torrent ports in csf

I use aria2 on my office with debian linux and aria2web to download some torrents on that. in brief it's a torrent client. but if i turn on csf, aria2c can't do that. which config should i do for csf ...
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1answer
66 views

How to block access from all hosting services? (like gutenberg.org) [closed]

gutenberg.org blocks access to all hosting services as per http://www.gutenberg.org/error403.php How to achieve this? Is there a list of hosting ips? Also, would these be added to CSF?
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1answer
425 views

IPTABLES nat maintaining source IP address with CSF

We have been using CSF on a virtualized (OpenVZ) environment successfully for a while combining venet and bridged interfaces so we can use public IPs + local addressed virtual systems. Kernel IP ...
1
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1answer
272 views

How to white-list specific PHP script process in CSF?

I repeatedly receive a "Suspicious Process" notice from lfd. I'm 100% positive that the PHP script triggering this warning is safe. I wrote it myself and it makes some cross server calls that must ...
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1answer
283 views

Does LFD check for failed HTTP Digest login attempts?

I am sure that LFD (Login Failure Daemon) checks Apache's error log for failed HTTP authentication attempts ie. log entries like: [Mon Feb 25 10:12:45 2013] [error] [client 10.0.0.1] user FAKEUSER ...
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1answer
1k views

cPanel server - Dovecot logins failing on specific IP address

I'm having a strange issue with one of our cPanel/WHM servers where it appears to be failing dovecot (IMAP/POP3) logins only from a specific IP address. The client was setting up a new workstation and ...
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3answers
745 views

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

How would using PubkeyAuthentication would be in a single way more secure than using PasswordAuthentication, considering the fact that the server's Firewall blacklists an IP after 2 unsuccessful ...
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1answer
302 views

csf/lfd parameter that prevent smtp attacks?

I have a 4~5MB logwatch like this every day! someone like to hack my smtp: .... --------------------- sasl auth daemon Begin ------------------------ SASL Authentications failed 3965 Time(s) ...
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1answer
690 views

CSF/LFD - Suspicious processes when running nginx+php5-fpm+ Mysql

I am running LFD/CSF on three servers and on all servers I have the same problem since the first day when I set-up the server and installed LFD/CSF. I have nginx + php5-fpm + MySQL installed and ...
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1answer
126 views

Interpreting CSF emails

I get emails from CSF every time it blocks someone. Here's one I got this morning: Time: Sat Jan 19 10:17:24 2013 -0800 IP: <REDACTED> (US/United States/-) Hits: 21 Blocked: ...
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1answer
456 views

CSF blocks my IP trying to access Webmin

I'm in no way a sysadmin, so bear with me a little. I have a cloud server running Centos 5. I have Virtualmin/Webmin with a handful of sites running without issue. I also have CSF installed to stop ...
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0answers
104 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 ...
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2answers
259 views

Error when restarting csf on DirectAdmin server running centos

I just installed csf on a DirectAdmin server running CentOS. When i restart csf it however says: Restarting bandmin acctboth chains for cPanel open3: exec of /usr/local/bandmin/bandminstart ...
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1answer
704 views

MySQL port 3306 blocked in csf yet can still telnet to port 3306 from external host

We have a Centos 6 VPS that was recently migrated to a new machine within the same web hosting company. It's running WHM/cPanel and has csf/lfd installed. csf is set up with mostly vanilla config. ...
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1answer
166 views

LFD always stops working after ~30 days, until I give /etc/csf/csf.pl -r

When I give /etc/csf/csf.pl -r , I see lots of lines flushing, then I begin to get the notification emails again, (several emails per day), for example: Time: Wed Sep 12 08:39:47 2012 +0800 IP: ...
2
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1answer
159 views

Best way for automated ban / throttle of aggressive clients on a Linux / Apache webserver for a period of time?

I notice occasional spikes on my server load and when I check access logs I notice a pattern for some automated forum poster that tries to repeatedly access a comment/reply URL. What would be the best ...
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1answer
192 views

Exclude minify from CSF/LFD

I have currently installed minify on on of my websites however I am currently getting hammered with email from CSF/LFD. Example: Time: Fri Aug 10 13:10:03 2012 +0700 File: ...
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0answers
111 views

CSF/LFD configuration settings

/bin/gtar -c -f - -X /home/{USER}/cpbackup-exclude.conf -X /etc/cpbackup-exclude.conf . How can I white list these strings? I've tried stuff like: pcmd: /bin/gtar -c -f - -X /home/* and still ...
1
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2answers
479 views

Automatic 777 file permissions when uploading files

When I upload new files to my CentOS server, with cPanel and CSF the files are all given 0777 permissions automatically. How do I change this? I don't want all my files to have 0777 permissions by ...
2
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1answer
186 views

What is the purpose of filtering egressing traffic (CSF)?

For a while now I am using CSF as main firewall with LFD, and OSSEC as main IDS. (I like OSSEC over the overreacting builtin IDS of CSF). I tested it for small DoS attacks such a slowloris variants ...
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1answer
117 views

Is CSF overkill? [closed]

My server runs just my own sites (vBulletin forums - which are always patched with security fixes) and Rails sites using the latest version) so do I really need CSF? ...
0
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1answer
601 views

ConfigServer Security and Firewall — after setup, how much daily management required?

I'm looking at using ConfigServer Security and Firewall (CSF; iptables-based). After I configure it properly, how much daily ongoing management is required of me to keep my server secure? Am I going ...
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1answer
220 views

CSF Log Watching

I run suphp so the uid of scripts is for the user not the webserver. My log files are also in /home/$user/logs/error.log CSF only monitors /var/log/apache2/error.log However because of my setup i ...
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1answer
710 views

Config Server Firewall: Spamming my email | lfd on localhost: Suspicious process running under user www-data

I have just installed and configured CSF and I am getting 100s of spam emails containing this message. lfd on localhost: Suspicious process running under user www-data Time: Wed May 23 01:05:52 ...
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1answer
386 views

Pros vs Cons of Rate Limiting ICMP [duplicate]

I am configuring Config Server Firewall and here is the default config for ICMP. I have read on the internet that disabling or limiting ICMP can cause huge headaches on your server. However I have ...
0
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1answer
4k views

Config Server Firewall: You need to install the missing perl modules and then install cxs

I am trying to install config server firewall however when i follow the tutorial and run install.sh i get the following error. Can anyone help? root@localhost:~/csf# sh install.sh Configuring for OS ...
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2answers
737 views

Should I disable iptables when I'm using csf?

Should I disable iptables when I'm using csf ? any help appreciated.
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1answer
777 views

How do to white list a specific IP with CSF?

I am using csf & lfd, I am trying to allow all traffic to a specific IP (my backup storage) which I'm using lftp to access. I have tried using csf.allow, but you have to specify a port or a ...
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2answers
2k views

How to make permanent changes to iptables of CentOS 5.5

I want to make an iptable rule permanent so if the server is rebooted I won't have to add the rule again. Specifically a rule I have related to nginx being reverse proxy of apache. iptables -t nat ...
2
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1answer
1k views

Allowing specific ports on specific interfaces/ip with CSF

I just learned about CSF, and like the logging/blocking possibilities it gives me. However it does not do the desired blocking. The situation is following, I have a server with multiple ip-addresses. ...
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1answer
534 views

Allow all IPs through a specific port range in CSF

How can I do this? For UDP it seems to work like this: udp:out:d=1_9000:d=0.0.0.0/0 but it doesn't seem to work when I change it to TCP and I need to enter a specific IP like ...
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3answers
2k views

How does iptables execute rules?

I've been having some trouble with a firewall blocking traffic between two servers recently and want to check how iptables handles multiple rules applying to the same IP. If I run iptables -L -n | ...