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I'm working by my customer premises and they let me connect my private laptop on a dedicated Wi-Fi for internet access. It's nice for external consultants. The only issue is that we can't connect on a remote server on port 25. I suppose this policy is set up to avoid infected computers sending spam from their network.
As you can have guessed, this is something weird that I can't send mail at all. Fortunately, I've a 3G cell phone that I can connect by Bluetooth on my laptop. So when I want to send an e-mail, I have to disconnect from Wi-Fi, connect my phone, send the e-mail, disconnect phone and reconnect Wi-Fi. Kinda overhead.
My question is: how can I tell Windows 7 to use the Wi-Fi for every out connection, but if it's a connection on port 25, use the cell phone network? With this solution, I could let my phone connected all day without having to switch again and again.
Thanks a lot for your anwwers. Fabian
Can we add a route only for a specific port and not a destination host? – Fabian – 2010-06-07T07:51:16.950
@fabianvilers No, the routing table only handles IP addresses. You would need a NAT/firewall which supports routing based on port to do that. I'm afraid I don't know any off the top of my head for Windows. – Darth Android – 2010-06-07T08:04:50.787
@fabianvilers, i think that is a limitation of window's routing system. @Darth Android is correct. – bubu – 2010-06-07T08:54:08.850
It's not exactly a limitation - IP routing only deals with IP addresses. Ports (TCP or UDP) are on a higher level. – user1686 – 2010-06-07T15:40:00.393
@grawity, i do agree with you that IP routing only deals with IP addresses, but policy-based routing (as in cisco routers) supports port, of course, so when we are talking about routing capability (in general), i think calling it a limitation is not exactly wrong :) – bubu – 2010-06-07T15:56:00.930
@bubu: Well, a consumer-oriented OS rarely needs the same set of capabilities as specialized Cisco hardware. – user1686 – 2010-06-08T09:39:57.080
@grawity - okay, okay. I agree with you. :) – bubu – 2010-06-08T15:36:10.730