Tja, die hier diskutierten Lösungen haben bei mir alle nix geholfen, zwei XP-Maschinen, einer Client, einer Host, MTU verändert, alle möglichen anderen Dinge verändert und imer wieder das gleiche: auf dem Client hängt das INternet und bekommt nur sporadisch Verbindungen zu Netzseiten. Habe jetzt folgende Lösung gefunden, die vielleicht auch andere interessiert (aber auch das ist natürlich nicht im Sinne des Erfinders des ICS, außerdem funktioniert imer noch nicht der Mailabruf über Eudora auf dem Client, bin deshalb für weitere Hinweise dankbar):
So instead, I went looking for another way of doing things, and came up with an elegant solution for Internet Explorer. A solution that is based on the following considerations: The current versions of (Windows) IE, provides pretty good proxy (or no proxy) detection. The AnalogX proxy program uses port 6588 for both HTTP and HTTPS. (HTTP, or normal Webpages, usually load by using port 80. And HTTPS, or secure Webpages, usually load by using port 443.) The AnalogX proxy also provides reasonably complete socks support. (Socks is a special type of Internet proxy, that many newer programs are able to use.) And finally, an HTTPS proxy seems to be needed; but any HTTP proxy will cause some sites that did work to stop loading correctly.
Note: Most "Banner Blocking" programs also work as an HTTP proxy.
The following steps were taken to implement this work-around:
The AnalogX proxy program was installed on the Internet Windows XP computer, then configured as follows:
Set the program to listen to only the IP address for the network card connected to the local network. (Usually 192.168.0.1)
Set this to act as only an HTTP, HTTPS and Socks proxy. (HTTP and Socks are on, all others are off.)
On each computer using ICS, set-up the Internet Options for Internet Explorer as follows:
Go to the "Connections" tab, and the "LAN Settings" button.
Select (check) both the "Automatically detect settings" box, and the "Use proxy server" box.
Select the proxy "Advanced" button to manually configure some proxy settings.
Leave the line for "HTTP:" blank. (No HTTP proxy used.)
For the "Secure:" line (HTTPS) set the "Proxy address to use" to the IP address the AnalogX proxy is listening on. (Again, usually 192.168.0.1) Then set the "Port" to 6588
For the "Socks:" line again enter the IP address the AnalogX proxy is listening on, and this time a port number of 1080
Finally, select OK for each of the open windows.
To use this set-up, the AnalogX proxy must first be started (run), on the Windows XP system, which is directly connected to the Internet. (Possibly by having a copy of the AnalogX proxy icon placed in the Startup folder.) Then for any computer connected to this Windows XP system, when Internet Explorer is started, it will automatically detect and use the AnalogX proxy to load Webpages. Otherwise, it will continue to directly use just the Windows XP ICS for Usenet news, email, etc..
A laptop and docking station is one situation which shows how robust this solution really is. That when the laptop is in the docking station, it connects to the Internet via the local network, using ICS and the AnalogX proxy as above. But when the laptop is mobile, and connects directly to the Internet via a dial-up modem, the settings for that dialup networking connection are used. Thus while using dialup access with IE, Outlook, Outlook Express, etc., everything still works as it had before the above work-around was implemented.
Referenz: http://www.allensmith.net/Network/xpICS.htm
STefan