iChat and Internet Sharing

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Level 4

2,558 points

iChat and Internet Sharing

Ok so my sister's iMac is connected DIRECTLY to the cable modem... no router.

Why she is sharing the internet via the iMac's built in WiFi, we can no longer video chat.

Turn OFF internet sharing, and everything works just fine.

Curious thing is her computer is listed on my Dot Mac account, and even with Internet Sharing turned on, I can still log in and see her screen thru Dot Mac.

Any ideas?

Dual 2.26 MacPro, and 15" MBP, Mac OS X (10.5.6)

Posted on Apr 12, 2010 1:45 PM

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Answer 1

Best reply

Ralph-Johns-UK

Level 9

76,789 points

Apr 13, 2010 12:19 PM in response to Jeffrey Lee

Hi,

If your sister is on 10.5.x there is a "known issue" with Internet Sharing if it is On (even if nothing is attached as it were) and iChat.

The upshot is in OS 10.5.x Internet Sharing has to be Off.
If it is On because of Parallels then the two VPNs that are also created need also turning Off in System Preferences > Network and Parallels told to gets it's Own IP from the Routing device (Which she of course does not have).

What happens is Internet Sharing invokes the AMc to be a router and issues IPs to the devices connected.
This is turn provide s route to the Internet.
Unfortunately in Leopard (10.5.x) iChat can see this route to the Internet even if it is a WiFi able Mobile phone.

iChat cannot resolve tow connection to the Internet.