CSF Directadmin Issue Permission denied [User:admin UID:501]- Solved


This is a simple permission issue in directadmin. The CSF in directadmin is running a setuid program. So it simply need to enable the  setuid  permission for the root user in this  program.   You may need to look into the following  file ,

# ls -al /usr/local/directadmin/plugins/csf/exec/csf
-rwxr-xr-x 1 root root 8112 Jun 23 10:37 /usr/local/directadmin/plugins/csf/exec/csf

Now you need to enable the “S” bit as follows,

#  chmod  4755  /usr/local/directadmin/plugins/csf/exec/csf
# ll /usr/local/directadmin/plugins/csf/exec/csf 
-rwsr-xr-x 1 root root 8112 Jun 23 10:37 /usr/local/directadmin/plugins/csf/exec/csf

Now login to the directadmin  as admin user and check the CSF page. It must work.

How to configure Zimbra + CSF – The Best Zimbra Firewall Configuration

CSF is one of the best opensource firewalls that using in most of the hosting servers like cPanel and Directadmin . Also it is one of the best firewall for installing Zimbra Mail server . This documentation will help you to configure the CSF firewall in a Zimbra Standalone installation server.

Before starting the installation , you may need to read the documentation available on http://wiki.zimbra.com/wiki/Ports , this will help you to get a quick understanding of ports that required to open in a Zimbra server.

Install CSF :

You can download CSF from http://configserver.com/cp/csf.html and install it . After that open the CSF configuration and enable the following ports,

TCP_IN = "22,25,53,80,110,143,443,465,587,993,995,7071"
TCP_OUT = "22,25,53,80,110,113,443,465,587,993,995,7071"

Now you need to open the file /etc/csf/csf.pignore and add the following zimbra packages paths.


This will help to white list these binaries in CSF

Now you can start the CSF as follows and test it.

# /etc/init.d/csf start

You may need to test the mail server and its functionalities . After that you can disable the testing mode in csf.conf and reload CSF. You can also perform other generic CSF tweaks after that.

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