[AusNOG] Telstra 3G/4G Citrix, VPN Issues [SEC=UNCLASSIFIED]

[Tom.Minchin at csiro.au]

UNCLASSIFIED
Hi - we had some issues (still do)

Android 7.0 (Galaxy S8) > AldiMobile (Telstra Network) > HTML5 > Works (TCP)
Android 7.0 (Galaxy S8) > AldiMobile (Telstra Network) > Receiver 3.11.2 > Works (TCP)
Windows 10 1703 Laptop > Tethered - AldiMobile (Telstra Network) > HTML5 > Works (TCP)
Windows 10 1703 Laptop > Tethered - AldiMobile (Telstra Network) > Receiver 4.9 > Doesn't work 
Windows 10 1703 Laptop > Tethered - AldiMobile (Telstra Network) > Receiver 1.0.4.0 (Win10 Store) > Works (TCP)
Windows 10 1703 Laptop > Internode VDSL > HTML5 > Works (TCP)
Windows 10 1703 Laptop > Internode VDSL > Receiver 4.9 > Works (UDP)
Windows 10 1703 Laptop > Internode VDSL > Receiver 1.0.4.0 (Win10 Store) > Works (TCP)
iMac MacOS 10.12.4    Receiver 12.6    Exetel/Optus ADSL -> UDP (Works)
iPhone 6s iOS 10.3.2    Receiver 7.2.4   Exetel/Optus ADSL -> UDP (Works)
 iPhone 6s iOS 10.3.2    Receiver 7.2.4   Telstra mobile 4G    -> (not work) Server error.;
The server disconnected the session..
The operation could not be completed. (HdxSdkErrorDomain_Session error 8.)


-----Original Message-----
From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Ross Wheeler
Sent: Friday, 27 October 2017 10:30 AM
To: Jarryd Sullivan <Jarryd.Sullivan at area9.com.au>
Cc: ausnog at ausnog.net
Subject: Re: [AusNOG] Telstra 3G/4G Citrix, VPN Issues



On Thu, 26 Oct 2017, Jarryd Sullivan wrote:

> G'day, wondering if anyone else here has recently been experiencing 
> issues with any of their customers running Telstra 3G/4G services 
> using Citrix or VPN's? We've got a number of customers experiencing 
> issues where these no longer work, Citrix apps won't launch, VPN's 
> won't establish etc. and we've been discussing on the phone with 
> Telstra no one seems to be aware of any issues so trying to find out 
> if it's just isolated to our customers. I've got a few customers at 
> remote sites which rely upon 3G/4G services as their only internet 
> connection method as nothing else is available in the area. If we test 
> using other providers 3G/4G services there seem to be no issues.

Few weeks ago (13/Oct) I had a bunch of 3G/4G devices on telstra all failed at 2am. Only affected devices on one particular netblock (1.129/16 from memory).

Devices on 1.144/16 were unaffected.

Symptoms were VPN tunnels made from the devices to my servers all dropped and failed to re-establish. Each device required a powercycle to fix (a right royal PITA when many were in difficult-to-access locations).

Telstra confirmed with me that this was a "planned outage" for an upgrade to one of two Sydney POPs. I never got to the bottom of the problem, but telstra said they did find some issue and were going to try to fix that.

Then again a week ago (19/Oct) at 3am, the same issue but this time only affecting devices on 1.144/16 and not affecting 1.129/16. Telstra have failed to respond to my email to confirm if this was them updating the second POP or not, but it seems highly likely. This time I had a sneeky backdoor to my devices and was able to instruct them remotely to kill and restart the VPN. Most came back after that, a small number required site visits.

R.


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