check you squid.conf in /etc/squid.  Look for the line that reads acl Safe_ports, and add 2087 there.  Then do a service squid restart, and try it again.  You may have to wait a bit for squid to fully restart.  If that works, then create a custom template that adds this port to your squid.conf.  Do a mkdir -p /etc/e-smith/templates-custom/etc/squid/squid.conf, then change to that directory, then cp /etc/e-smith/templates/etc/squid/squid.conf/20ACL15Safe_ports .
Now edit this file and add your port.  Then do a /etc/e-smith/expand-template /etc/squid/squid.conf
Next, service squid restart
That should be it.
GL
JB