IPod Touch apps not working through proxy

Question

Prior to upgrading to the latest iPod Touch software, most of my apps worked through the proxy while on the wireless network at my business. Now, only Safari and few select apps seem to work.
Any ideas?

Answer 1

Hello All!
I think most of the problems you see are not realy issues caused by the proxy but the OS of the IPod.
I've had some Problems using Apps at Work using manual configured proxy settings.
Just a short story:
Usind OS 2.x Mail syncing Exchange worked prefect. Safari and Appstore too.
Youtube wasn't working cause Ipod first asked DNS Server for IP-Address of an Apple Server (I call IPod Proxy) and our DNS Servers are not allowed to resolve such Names.
Then I upgraded to OS 3.x. Same manual Proxy settings resulted in Mail syncing Exchange wasn't working.
Sniffed the Network for the traffic the IPod was sending an saw the following:
IPod asked DNS for proxy Server IP address, got answer.
IPod asked Proxy for URL to Exchange-Server and Proxy denied the request cause the Firewall denies Proxy (in DMZ) to connect to internal Servers.
Then I looked for exclusion list (don't use Proxy for domains ...) and found noting. So this feature isn't there!?
Then I switched from manual Proxy configuration to Automatic and created a proxy.pac file which url I gave the IPod
In the Proxy.pac file I used the "FindProxyForUrl" function to determine if the URL contains our local Domain or not. So if the URL contains our local Domain then the script returns to go direct with no proxy. Otherwise the script returns the name and port of the proxy
Here is the Script I use. This makes Mail (and maybe other Apps) working
function FindProxyForURL(url, host)
if (isPlainHostName(host)) {
return "DIRECT";
else if (shExpMatch(host,"*.our-local-domain.com")) {
return "DIRECT";
else {
return "PROXY Proxy-Server:port";
Never the less: I did not make Youtube app working with our Proxy (Squid proxy on Windows). When I'm using Microsoft ISA Server 2006 to connect to the Internet then I can at least search for Videos in the Youtube App (after Changing settings of our DNS Servers to resolve external Names) but I cannot play them cause the Video player in the IPod obivously doesn't care about Proxy settings (Sniffing the Network shows IPod trying to connect directly to Youtube/Google Servers and here is the Firewall saying NO"
So maybe problems using Apps with a configured Proxy could be because Apple does not have a "Don't use Proxy for" configuration. Youtube (and all other Apps using Video Player to play Video) do not work cause the Video Player does not care about Proxies (so many Video Players )
Perhaps someone at the Apple Support reads this and cares about