ip_contrack
It looks like you have a busy server. The errors meant that you have more TCP connections than the server is configured to keep track of. If you have APF installed by default it sets it to 34576. From experience that's far from sufficient on a busy server. If you do have it installed, edit /etc/apf/conf.apf and edit:

SYSCTL_CONNTRACK="34576"

to

SYSCTL_CONNTRACK="<some other number>"

You can increase it to 50000 for example and see if the errors resolve itself. Restart APF to load it.


If you are not using APF, here's what you need to do:

1. Check what is the max connections now:
cat /proc/sys/net/ipv4/ip_conntrack_max

Once the previous number hits the number above, you should start seeing
these messages. I would increase the latter number by calling:

echo "<some other number>" > /proc/sys/net/ipv4/ip_conntrack_max


In order to make this persistent even after rebooting, edit /etc/sysctl.conf :

echo "sys.net.ipv4.ip_conntrack_max = <some other number>" >> /etc/sysctl.conf


The next time you reboot you will be fine as well. After changing keep track of the logs. If the message continue to appear, increase it higher.

For the other errors, please show us your line 6 on /etc/hosts.allow and line 9 on /etc/hosts.deny.

Your /tmp looks fine.