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Cisco VPN over AT&T 3g = Fail?

10920 Views 12 Replies Latest reply: Apr 3, 2012 6:43 AM by MakMak1980 RSS
Ed34 Level 1 Level 1 (0 points)
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Jul 3, 2010 8:00 AM
We've puchased several 3g iPads for enterprise testing but are disappointed to find that Cisco ipsec VPN is being blocked over 3g connections! It works fine over WiFi or iPhone with the same config.

Is there a workaround or official word on why this is the case? Seems odd given it is marketed for enterprise use. Now that plans are metered, it seems unnecessary.

I've tried setting custom APN to match what works on iPhone but no luck! Thanks
  • Craig Brady Level 4 Level 4 (1,790 points)
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    Jul 3, 2010 9:02 AM (in response to Ed34)
    I am replying to you on IPSec VPN via Cisco right now. I am connected over 3G. My IT Department sent me instructions, and it worked the first time.
    IMac Intel 20" , Mac Mini PPC and MacBook Pro 2.2ghz (4GB, SSD), iPad 64GB X2, Mac OS X (10.5), iPhone 3G
  • Biosci Calculating status...
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    Jul 8, 2010 11:12 PM (in response to Ed34)
    Exact same problem here. VPN over wifi has worked great but imagine my surprise -- not to mention frustration -- when I found on my first business trip that i couldn't connect back home as planned. Definitely hoping for a quick resolution to this.
    iPhone OS 3.0
  • Marhk Calculating status...
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    Sep 28, 2010 4:42 PM (in response to Craig Brady)
    Mr. Brady,

    Would you please post the instructions?
    MacBook Pro 2.33, Mac OS X (10.6.4)
  • gentilm Calculating status...
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    Sep 29, 2010 9:19 AM (in response to Marhk)
    Hi All,
    I'm connecting directly by the iphone4 (IOS 4.1) to VPN (IpSec) throught WiFi network and I have no issue (I can ping internal/external nodes, browse intranet resources etc.), but if I connect trought an H3G network then I receive the VPN access confirmation but the mobile phone is no more able to communicate with any internal and external nodes (I have tried with a ping to internal site or ping internal IP or ping external site but no response).

    Please, have you any suggestion ?
    Do you think it is a software or a carrier issue ?

    Thanks,
    M.G.
    iOS 4
  • mkangrga Level 1 Level 1 (0 points)
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    Oct 22, 2010 7:54 AM (in response to gentilm)
    M.G.,

    This exactly mirrors my experience. Have you learned anything new about the issue? Any way to reach/ping internal nodes when connected via IpSec over 3G/EDGE? The whole VPN feature appears fairly limited in its use with this issue.

    Thanks,
    M.K.
    MacBook Pro, Mac OS X (10.4.7)
  • macbean101 Calculating status...
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    Oct 28, 2010 8:48 AM (in response to Ed34)
    This issue is a combination of two things. The Cisco VPN settings and how AT&T NATs the traffic.

    The only resolution that I know of is to change a setting on the Cisco VPN appliance. Not something most users can do (fortunately I manage ours).

    The setting is 'Enable IPSEC over NAT-T' which allows the client to communicate properly through the AT&T network.

    Message was edited by: macbean101
  • kpowdk Level 1 Level 1 (0 points)
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    Nov 26, 2010 2:02 PM (in response to macbean101)
    Hey, I got exactly the same problem.
    I have an Iphone 4, 4.2, except that I live in Sweden and have the operator "3" as carrier.

    I have tried everything, reset network settings, changing apn, reinstall AT&T client, nothing works.

    Any solutions?
    Iphone 4, iOS 4
  • xxx_alphadogg_xxx Calculating status...
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    Dec 17, 2010 1:05 PM (in response to Craig Brady)
    Craig, do you have contact information for your IT department or maybe some instructions. I'd like to know how they were able to resolve this. Any info will help. Thanks
    iPad, iOS 4
  • h0agie Calculating status...
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    Mar 22, 2011 11:59 AM (in response to macbean101)
    macbean101 wrote:
    This issue is a combination of two things. The Cisco VPN settings and how AT&T NATs the traffic.

    The only resolution that I know of is to change a setting on the Cisco VPN appliance. Not something most users can do (fortunately I manage ours).

    The setting is 'Enable IPSEC over NAT-T' which allows the client to communicate properly through the AT&T network.

    Message was edited by: macbean101



    THANK YOU! My group does manage our VPN so I was able to make the change. Throwing this toggle fixed the problem. FYI, I am not using an iPad. This worked for iPhone 3G and iPhone 4 users at iOS 4.2.1

    Message was edited by: h0agie
    MacBook Pro, Mac OS X (10.6.2)
  • MakMak1980 Level 1 Level 1 (0 points)
    Currently Being Moderated
    Apr 3, 2012 6:43 AM (in response to macbean101)

    Thanks! this has fixed my issues with connecting to Cisco VPN on israeli 3G network pelephone!

     

    I can now connect from my iphone or from my mac using tethering. I was struggling with this issue for months!

     

    Thanks allot

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