Ever find yourself in need of getting others around you to share your internet connection whether it be from your wired ethernet connection to your connection via your cellular phone (Sorry, Verizon folks here need not apply since they are special). Well, if you didn't want to break out a separate router and sutff the alternative is to make your own wifi hot-spot. There are products out there that do this today but if you have an existing connection and feel like using it for the good of others around you you can try installing the Virtual Router from Microsoft. Although its in beta its totally free. Give it a try!
Virtual Router at Codeplex:
http://virtualrouter.codeplex.com

Using FTP in IAD03

You requested Networking to open ports 20 and 21. FTP connections using Active Mode work fine but Passive mode isn't working. Symptoms include being able to authenticate but trying to do a directory listing or upload/download a file fail, logging the person out.
You need to configure the FTP daemon software to use a high port range for Passive mode transfers. Start at port 1025 and go from there (32768 is good.) The firewall, generally, won't let you make connections from a low numbered port.
Also, do NOT configure the FTP daemon to hand out the public IP address associated with the FTP server. By this, I mean, your FTP daemon software may allow you to specify an IP address for use in general or specifically for Passive mode. You don't need to set this. When the PORT command is sent, the load balancers will intercept it and substitute the proper VIP address. If you do set an explicit IP address, the load balancers will assume it is a forged PORT command and drop the session entirely.
If the wiki allowed for file uploading, I could show you an example using the Filezilla FTP Server software, but....
Here are two references on Active mode and Passive mode FTP:
FTP from Wikipedia
FTP and firewalls from NcFTP