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I want to access an Oracle database from Python's cx_Oracle module using my laptop (Windows XP SP3). The DB is hosted on a remote server configured by a third party. They set up a PPTP VPN for doing so.

Now when I bring my laptop to my office, everything works fine.

However, when I take the exact same steps on the same laptop at home, something goes wrong and I'm not sure what. The symptoms are

  • I can usually connect flawlessly to the VPN (or so it seems anyway)
  • My entire internet connection seems slow when VPN connected
  • Pinging the DB host usually (but not always) times out
  • When using tracert on the DB host, the first steps are OK, later ones tend to time out
  • DB requests tend to time out
  • I succeeded only once (out of some 25 attempts) to actually access the DB

I suspect the problem is in my home router (Zyxel p-2812hnu-f1) but I'm not very familiar with networking and I don't know what may be likely causes - let alone how to fix it.

"VPN" is mentioned only once in its entire manual so that doesn't really help either.

Any suggestions are more than appreciated.

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Your router indeed does not seem to have any provision for VPN passthrough, which should be enabled to allow you to connect to a remote server. There is no mention of PPTP, nor VPN, nor passthrough in the index of its User's Guide. It really looks like you will have to get a different model, to allow you to connect to any VPN.

share|improve this answer
    
I did access the DB (once) via my router over VPN so I do believe the router is capable of doing it. – RubenGeert Dec 10 '13 at 8:58

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