The d=443 part is the https port, so you can repeat for other services as well to limit connections if you like.
You must change YOURHOMEIPHERE to the IP address you want to let in. If this is going over the Internet you need to know your external IP address. Try http://www.ipaddressworld.com/ or some such service to see what your external IP address is.
Save the changes.
5) Edit the /etc/apf/deny_hosts.rules file
EG: vi /etc/apf/deny_hosts.rules
Scroll down until the last default comment ## then below it add the following:
i am a student of diploma in electronics and telecomm
can anyone suggest me projects related to the below domains:-
electrical and electronics