Mac OS X forum: Problems sharing my internet through imac

Although this will work, or should do, by far the easiest and most efficient way to share an internet connection is by using a Router. A wireless one in your case.

If you are sure you followed all the steps in the Hep topic on this subject, try making your wireless network open by removing the password requirement.
This will allow you to see if you have any other settings that are not quite correct without the added problem of WEP configuration.
Once you have achieved your aim, turn on the WEP again

Let us know how you get on

P

But if I'm at a hotel and want to share the connection from Mac to Windows laptop, then I'm better off using internet sharing and WEP than having an unsecured network and potentially letting anyone charge my internet usage to me at great cost.

WEP can be made to work but Apple's wep key generation is a bit weird:

See this
http://www.atpm.com/8.04/wifi.shtml

Use Wep Key Generator and enter a hex key (preceded by $) on OS X and same HEX key on PC and WEP is usable.

I can only run WEP myself since my Macs will report errors in Network Utility should I switch to the more secure, WPA protocol. I do not know why this is, and I have changed the encryption forms a few times in order to fix it, but I come to no solution. The network overall seems to work generally faster over WEP.

This may tie in somewhere to my current networking configuration, as I have found that I can't use Back To My Mac anymore, due to have more than one device providing NAT services. I think this is because my router has had both of these options enabled, and the modem that my ISP recently shipped me features a built-in router. I would assume that it would have these features as well. I disabled the modem's wireless broadcast, but I left the rest of its features alone. I may have to go back and change some major settings. I think I'd have better luck by addressing the modem first, since I believe the router is working normally. But I can't understand why WPA does not work over my network. I know it didn't work with my original modem and router... Back To My Mac did work before too. I'll have to look into it. It's quite annoying that I can't get my Macs to work properly over WPA.

-BMF

by setting the modem back into bridge mode. I previously had it in standard mode with WiFi disabled, hence the NAT conflicts. Even when I removed my external router from the equation, Network Utility reports errors with WPA for some reason, and although it connects to the web for awhile, it appears that my MacBook just won't cooperate. It could either be a problem lying the Leopard code, or a problem with the DSL lines themselves. It did this a long time ago when using older hardware, and the old MacBook I had reported this as well. Probably a fault within the lines indeed.

Whatever it is, it has been working fine with WEP, and no one has hacked it since I enabled it. There are a handful of WiFi networks all around, and some are unprotected. If any passerby wanted to "steal" a signal, they'd probably go after those.

-BMF

Routers are 20 bucks at Fry's so we never use internet sharing anymore...

Sadly some gear isn't playing well on WPA2. Since WPA doesn't have a few minute crack tool our network forum sticky is stopping at WPA for now.