I am trying to access my home machine from work - it works fine at
home. I get:

16536: ssh_exchange_identification: Connection closed by remote host

Following the advice of the link below, I modified hosts.allow to:

sshd : ALL : ALLOW

http://www.snailbook.com/faq/libwrap-oops.auto.html

I then killed the ssh dameon, restarted xinetd, and restarted ssh to
listen on port 80 to avoid work firewall issues:

sshd -p 80

I still get the error. I can ping the machine. nmap shows port 80 open.

Any ideas?
iksrazal

try editting /etc/ssh/sshd_config to listen on port 80. you could
possibly also find something else that isn't configured right that might
be the problem