Ports, Protocols, and IP Address Ranges for Firewalls

If you’re building or installing a firewall to protect your computer and your data, basic information about Internet configurations can come in very handy. The following tables give you the facts on IP protocols, ports, and address ranges.

































Common IP Protocols
ProtocolName
1ICMP (ping)
6TCP
17UDP
47GRE (PPTP)
50ESP (IPSec)
51AH (IPSec)















































































Common TCP and UDP Ports
ProtocolPortName
TCP20FTP data
TCP21FTP control
TCP23Telnet
TCP25SMTP (E-mail)
TCP/UDP53DNS query
UDP67/68DHCP (Dynamic IP address configuration)
TCP80HTTP (Web)
TCP110POP3 (E-mail)
TCP119NNTP (Newsgroups)
TCP143IMAP4 (E-mail)
TCP389LDAP (Directory service)
TCP443HTTPS (Web SSL)
UDP1701L2TP (Virtual Private Networks)
TCP1723PPTP (Virtual Private Networks)




















Private and Automatic IP Address Ranges
A10.0.0.0 to 10.255.255.255 (10.0.0.0/8)
B172.16.0.0 to 172.31.255.255 (172.16.0.0/12)
C192.168.0.0 to 192.168.255.255 (192.168.0.0/16)
APIPA169.254.0.0 to 169.254.255.255 (169.254.0.0/16)








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Source:http://www.dummies.com/how-to/content/ports-protocols-and-ip-address-ranges-for-firewall.html

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