Hi, I'd like to prevent users from using POP3/IMAP other than via SSL. To do that I am attempting to use the firewall to close non-SSL POP3/IMAP ports. I am having trouble getting the firewall function to work properly. System: ISPConfig 2.2.40 running on Ubuntu 10.04.4 LTS configured as described in the Perfect Server Manual. I activated all services under Management > Server > Services, including Firewall which was initially OFF. On the Firewall tab I set the following configuration: Code: Name Port Type Active FTP 21 tcp no SSH 22 tcp yes SMTP 25 tcp yes DNS 53 tcp no DNS 53 udp no WWW 80 tcp yes ISPConfig 81 tcp yes POP3 110 tcp no IMAP2 143 tcp no SSL (www) 443 tcp yes Webmin 10000 tcp no IMAPS 993 tcp no However, when performing a port scan I am seeing 53, 110, 143 open. I have not seen any error messages. I am avoiding configuring a firewall separately because I do not want to interfere with ISPConfig. Does anyone have any hints? Is there another way to ensure that users can only use SSL to connect to email services? Thanks!