- Edited
There were two things I had to do to get things to be responsive.
1) Make sure host resolution is working. I'm on RedHat, so I had to make sure /etc/resolv.conf and /etc/nsswitch.conf was correctly configured.
2) Disable IPv6 if you're not using it.
Between those two things, my osTicket 1.7.3 installation is very quick.