Mobile L2TP Technical: Difference between revisions

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Revision as of 12:52, 11 May 2016 (view source) AA-Andrew (talk \| contribs) m (→‎Connect Speed) ← Older edit		Latest revision as of 09:26, 16 June 2020 (view source) AA-Andrew (talk \| contribs) mNo edit summary
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__NOTOC__<indicator name="L2TP">[[File:Menu-L2TP.svg\|link=:Category:L2TP\|30px\|Back up to the L2TP Category]]</indicator> An L2TP tunnel is established using the pre-agreed IP addresses, hostname and shared secret. Note that if your LNS rejects the tunnel connection, or fails to respond to the SCCRQ or a subsequent HELLO, then it will be ~~black listed~~block for 5 minutes allowing further connections to go to the fall-back LNSs. Once the tunnel is established, a session is established for each connecting data SIM. We've seen various devices give odd Connect Speed settings when they connect. EG, OSX sends: Connect Speed: 1000000 And a Pfsense has been seen to send ~~10Mb~~10Mbit/s and even the source code had it hard coded to ~~10Mb~~10Mbit/s. [[File:L2TP OS X speed weirdness.png\|thumbnail\|TCP Dump of OSX L2TP highlighting the 'Connect Speed']] This means that it is asking for a ~~1Mb~~1Mbit/s connection. This does not looks like it's configurable either. From May 2016 we ignore the Connect Speed, and simply limit the speed to ~~100Mb~~100Mbit/s at our side.