We wanted to reiterate the points made in the csf configuration and during csf restart regarding the PT_USERKILL option and the problems it can cause on servers as there appears to have been a spate of people enabling the option, which we do not recommend for stability reasons.
As csf itself now reports:
*WARNING* PT_USERKILL should not normally be enabled as it can easily
lead to legitimate processes being terminated, use csf.pignore instead
And as stated in /etc/csf/csf.conf:
# Warning: We don't recommend enabling this option unless absolutely necessary
# as it can cause unexpected problems when processes are suddenly terminated.
# It can also lead to system processes being terminated which could cause
# stability issues. It is much better to leave this option disabled and to
# investigate each case as it is reported when the triggers above are breached
We are in the process of adding IPv6 connectivity to all of our domains. This has been enabled on www.waytotheweb.com and www.configserver.com so far.
Due to the way implementation of IPv6 often works over protocols and applications, connections and requests will usually prefer IPv6 over IPv4 connections and DNS resolution.
If you see IPv6 connectivity issues, ensure that you have enabled outgoing connections to port 80 and 443 in TCP6_OUT in your csf.conf.
If you still see problems, you will have to investigate your IPv6 server configuration to resolve the issue, or disable IPv6 on the server if it does not work.