Don't know about the rest, but you can kill the services. Log in as root or use su to become root, then simply do
kill -1 <pid>
where <pid> is the pid of the service you want to kill. You can get a list of pids and service names by doing
ps -A -f
in a terminal. Note that if kill -1 doesn't work (always try it first) you can force a service to die by doing
kill -9 <pid>
although this is not recommended.
I am guessing your issue is some sort of packet filtering thing in the firewall application you tried that has not been stopped or is working incorrectly.
