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Use WEP if you don't have anything but that...but WPA would probably be a better choice. Here is a list of some commonly used ports, and what they do in case you want to close them off.
For instance - I close off the Gnutella P2P (BearShare, LimeWire etc..) port from 1-6 AM because I don't want anyone using my connection at that time.
I know this doesn't have much to do w/ encryption - but these ports are really handy to know. Write them down or cut & paste them.
Protocols:
TCP - Transmission Control Protocol
IP - Internet protocol
FTP - File transfer protocol
ARP - Address Resolution Protocol
(resolves IP to MAC address)
SMTP - Simple mail transfer protocol
RIP - Routing information protocol
(used by routers)
SAP - Service advertising protocol (used by routers)
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TCP Ports:
TCP: 1 (TCP port service multiplexer)
MSP: 18 (message sending)
FTP: 20, 21 (data/control)
SSH: 22 (remote login)
Telnet: 23
SMTP: 25
DNS: 53 (domain name system)
TFTP: 69 (trivial file transfer)
Gopher: 70
Finger: 79 (important)
HTTP: 80
POP: 109, 110 (2/3)
SFTP: 115
NetBIOS: 137, 139 (name/datagram)
IRC: 194 (internet relay chat)
DHCP: 546, 547 (Client, server)
MSN: 569
Gnutella: 6346 (filesharing)
Ports range from 0 to 65,536
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- Dzur
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