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<p class="MsoNormal">Hi Matthew,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I hope the below can provide you with some more clues as to what is going on…<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’ve repeated some information for completeness.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">For your information the attached documents are as follows with a brief description of which each one shows…<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">primary.vpn – an export of the primary VPN connection settings used (PSK, unique ID, gateway IP removed) – these same settings are used on every client.<o:p></o:p></p>
<p class="MsoNormal">secondary.vpn - an export of the secondary VPN connection settings used (PSK, unique ID, gateway IP removed) – these same settings are used on every client.<o:p></o:p></p>
<p class="MsoNormal">debug1.txt – log for LAN connection to primary VPN – taken from client2, worked OK every time for both clients.<o:p></o:p></p>
<p class="MsoNormal">debug2.txt – log for WIFI connection to primary VPN - taken from client2, negotiation time occurred every time for both clients.<o:p></o:p></p>
<p class="MsoNormal">debug3.txt – log for LAN connection to secondary VPN – taken from client2, no DHCP response from gateway every time for both clients.<o:p></o:p></p>
<p class="MsoNormal">debug4.txt – log for WIFI connection to secondary VPN – taken from client2, no DHCP Response from gateway every time for both clients.<o:p></o:p></p>
<p class="MsoNormal">primary-phase1.jpg – screenshot of primary remote gateway’s phase1 settings.<o:p></o:p></p>
<p class="MsoNormal">primary-phase2.jpg – screenshot of primary remote gateway’s phase2 settings.<o:p></o:p></p>
<p class="MsoNormal">secondary-phase1.jpg – screenshot of secondary remote gateway’s phase1 settings.<o:p></o:p></p>
<p class="MsoNormal">secondary-phase2.jpg – screenshot of secondary remote gateway’s phase2 settings.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><u>Client 1 Details:<o:p></o:p></u></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoPlainText">VPN Client Version: 2.1.7<o:p></o:p></p>
<p class="MsoPlainText">Windows OS Version: Windows XP Professional SP3<o:p></o:p></p>
<p class="MsoPlainText">LAN Adaptor: Broadcom NetXtreme 57xx Gigabit Controller<o:p></o:p></p>
<p class="MsoPlainText">LAN Drivers: 06/03/2007 10.26.0.0<o:p></o:p></p>
<p class="MsoPlainText">WIFI Adaptor: Intel Pro/Wireless 3945ABG<o:p></o:p></p>
<p class="MsoPlainText">WIFI Drivers: 15/08/2010 13.3.0.137 (latest)<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><u>Client 2 Details:<o:p></o:p></u></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">VPN Client Version: 2.1.7<o:p></o:p></p>
<p class="MsoPlainText">Windows OS Version: Windows 7 Professional<o:p></o:p></p>
<p class="MsoPlainText">LAN Adaptor: Broadcom NetXtreme 57xx Gigabit Controller<o:p></o:p></p>
<p class="MsoPlainText">LAN Drivers: 21/05/2010 14.2.0.5<o:p></o:p></p>
<p class="MsoPlainText">WIFI Adaptor: Intel Pro/Wireless 3945ABG<o:p></o:p></p>
<p class="MsoPlainText">WIFI Drivers: 26/03/2009 12.4.1.4<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><u>Local Gateway Details:<o:p></o:p></u></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Router Make/Model: Belkin F5D8636-4 v2<o:p></o:p></p>
<p class="MsoPlainText">Router Firmware: 2.00.20 (Oct 5 2009 17:17:19)<o:p></o:p></p>
<p class="MsoPlainText">ISP: TalkTalk<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><u>Remote Gateway Details (for Primary VPN):<o:p></o:p></u></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoPlainText">Gateway Make/Model: FortiGate 310B<o:p></o:p></p>
<p class="MsoPlainText">Gateway OS Version: 3.00-b5298(MR6)<span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><u>Remote Gateway Details (for Secondary VPN):<o:p></o:p></u></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoPlainText">Gateway Make/Model: FortiGate 300A<o:p></o:p></p>
<p class="MsoPlainText">Gateway OS Version: 3.00,build0413,070503<o:p></o:p></p>
<p class="MsoPlainText"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoPlainText">It’s also worth noting that the route into the Primary and Secondary gateways are physically different i.e. use different ISPs, one is a 30Mb leased line, other is an 8Mb business broadband link.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoNormal">So the above scenario and results is as follows:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Client 1 and client 2 try to connect to the primary VPN connection by LAN, which points to the primary remote gateway – result is OK every time.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Client 1 and client 2 try to connect to the primary VPN connection by WIFI, which points to the primary remote gateway – result is negotiation timeout everytime.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Client 1 and client 2 try to connect to the secondary VPN connection by LAN, which points to the secondary remote gateway – result is no DHCP response from gateway everytime.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Client 1 and client 2 try to connect to the secondary VPN connection by WIFI, which points to the secondary remote gateway – result is no DHCP response from gateway everytime.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The scenario described above is not an isolated occurrence. We have occurrences of this for many other people. All people have the below characteristics; for some it works with no problems, other it’s a bit hit and miss, others it’s never
worked at all.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l2 level1 lfo4"><![if !supportLists]><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>All use ShrewSoft VPN client release 2.1.6.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l2 level1 lfo4"><![if !supportLists]><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Use a variety of local gateways and ISPs such as TalkTalk, BTInternet, Sky, Tiscali.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l2 level1 lfo4"><![if !supportLists]><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>All use Windows XP SP3.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l2 level1 lfo4"><![if !supportLists]><span style="mso-list:Ignore">4.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>All have Broadcom NetXtreme 57xx Gigabit Controller/ Intel Pro/Wireless 3945ABG but with differing driver versions.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l2 level1 lfo4"><![if !supportLists]><span style="mso-list:Ignore">5.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>All use exactly the same VPN connection settings and are all trying to connect into the same remote gateways (primary and secondary).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Further information to the above scenario is that Client 1 works fine, no problems at all, at several other locations by both WIFI and LAN over the primary and secondary connections/gateways.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Furthermore, what was extremely surprising was that yesterday I tried the exact scenario again – however, client 2 was able to connect to primary via WIFI successfully on one occasion only.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>To reproduce: </b>The only way I have able to reproduce this with Client 1 (at another location where this issue does not exist by default) is by using a network bandwidth throttler. The only way to recreate the problem is to limit network
upload and download to about 150Bytes, where at this point I start to get the No DHCP response and negotiation timeout messages. However at the location of people with the described problem, network speeds are much greater than this e.g. a 2Mb-8Mb broadband
link with what you would expect as average/acceptable upload/download speeds. <o:p>
</o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Our thoughts:</b> We are thinking that for some reason ShrewSoft isn’t giving our FortiGate enough time to respond. What we’ve experienced to date has a certain timeout/latency feel to it. Our reasons for thinking this are as follows:
with our previous VPN client (the Fortigate proprietary VPN software – FortiClient, which we had few VPN connection problems with) establishing the VPN connection used to take longer than with successful ShrewSoft attempts. Shrewsoft doesn’t seem to ‘hang
around’ enough before giving the described error messages in comparison to how long it sometimes used to take to establish a successful connection with the Forticlient software – it’s like ShrewSoft times out on waiting for a response. Furthermore for a given
client occurrence of No DHCP response from gateway, on our remote gateway logs we can see phase 1 come up, but not phase 2. So these clients hit the remote gateway ok but don’t get any further than this. Our network engineers have inspected the logs are said
that the cannot see any errors – it’s as if the connection attempt get terminated from the client end.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Our efforts to date with no improvement: <o:p></o:p></b></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo6"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Reinstallation of ShrewSoft client.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo6"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Upgrade of ShrewSoft client to 2.1.7.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo6"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Recreation of VPN connection settings.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo6"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Upgrade of client’s network adaptor drivers to latest versions.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo6"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Disabling/enabling of NAT-T on the ShrewSoft client.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo6"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Reducing the MTU on the ShrewSoft client.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo6"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Disabling/enabling of DPD on the ShrewSoft client.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo6"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Disabling/enabling of IKE Fragmentation on the ShrewSoft client.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any suggestions which you can make would be most appreciated – I’m here and willing to test any solutions which you may be able to offer.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Once again thanks for all of your assistance,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best Regards,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Century Gothic","sans-serif";color:#244061;mso-fareast-language:EN-GB">Ben Chamberlain<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Century Gothic","sans-serif";color:#244061;mso-fareast-language:EN-GB">Swyddog Cefnogi Cymorth Technoleg Gwybodaeth a Chyfathrebiadau/Information
and Communications Technology Support Officer<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Century Gothic","sans-serif";color:#244061;mso-fareast-language:EN-GB">Gwasaneth Tân ac Achub Gogledd Cymru/North Wales Fire
and Rescue Service<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Century Gothic","sans-serif";color:#1F497D;mso-fareast-language:EN-GB">Am archwiliad diogelwch tân yn y cartref, ffoniwch
0808 100 2863, e-bostiwch </span></b><a href="mailto:cfs@nwales-fireservice.org.uk"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Century Gothic","sans-serif";mso-fareast-language:EN-GB">cfs@nwales-fireservice.org.uk</span></b></a><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Century Gothic","sans-serif";color:#1F497D;mso-fareast-language:EN-GB">
neu ymwelwch â </span></b><a href="http://www.gwastan-gogcymru.org.uk/"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Century Gothic","sans-serif";mso-fareast-language:EN-GB">www.gwastan-gogcymru.org.uk</span></b></a><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Century Gothic","sans-serif";color:#1F497D;mso-fareast-language:EN-GB">.<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Century Gothic","sans-serif";color:#1F497D;mso-fareast-language:EN-GB">For a free home fire safety check, please call 0808 100 2863, e-mail
</span></b><a href="mailto:cfs@nwales-fireservice.org.uk"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Century Gothic","sans-serif";mso-fareast-language:EN-GB">cfs@nwales-fireservice.org.uk</span></b></a><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Century Gothic","sans-serif";color:#1F497D;mso-fareast-language:EN-GB">
or visit </span></b><a href="http://www.nwales-fireservice.org.uk/"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Century Gothic","sans-serif";mso-fareast-language:EN-GB">www.nwales-fireservice.org.uk</span></b></a><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Century Gothic","sans-serif";color:#1F497D;mso-fareast-language:EN-GB">.</span></b><span style="font-size:10.0pt;font-family:"Century Gothic","sans-serif";mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<p><span style="font-family:'Arial';font-size:7pt;">**********************************************************************</span></p>
<p style="margin-top: 5pt;margin-bottom: 5pt;"><span style="font-family:'Arial';font-size:7pt; color:#000000;"><b><u>Cyfrinachedd:</u></b></span><span style="font-family:'Arial';font-size:7pt; color:#000000;"> Mae’r neges e-bost hon ac unrhyw ffeiliau a <br>
drosglwyddir gyda hi, yn breifat ac fe allent fod yn cynnwys gwybodaeth <br>
sy’n gyfrinachol neu’n gyfreithiol-freintiedig. Os byddwch yn derbyn <br>
y neges hon trwy gamgymeriad, a fyddech mor garedig â rhoi <br>
gwybod inni a chael gwared arni o’ch system ar unwaith.<br>
<br>
</span><span style="font-family:'Arial';font-size:7pt; color:#000000;"><b><u>Ymwadiad:</u></b></span><span style="font-family:'Arial';font-size:7pt; color:#000000;"> Fe allai e-bostio trwy’r We fod yn agored i oedi, <br>
rhyng-gipio, peidio â chyrraedd, neu newidiadau heb eu hawdurdodi. <br>
Felly, nid yw’r wybodaeth a fynegir yn y neges hon yn cael cefnogaeth <br>
GTAGC oni bai fod cynrychiolydd awdurdodedig, yn annibynnol <br>
ar yr e-bost hwn, yn hysbysu ynghylch hynny. Ni ddylid gweithredu <br>
o ddibynnu ar gynnwys yr e-bost hwn yn unig.<br>
<br>
</span><span style="font-family:'Arial';font-size:7pt; color:#000000;"><b><u>Monitro:</u></b></span><span style="font-family:'Arial';font-size:7pt; color:#000000;"> Bydd GTAGC yn monitro cynnwys e-byst at ddiben <br>
atal neu ddarganfod troseddau, a hynny er mwyn sicrhau diogelwch <br>
ein systemau cyfrifiadurol a gwirio cydymffurfiad â’n polisïau.<br>
<br>
</span><span style="font-family:'Arial';font-size:7pt;">Gwasanaeth Tân ac Achub Gogledd Cymru <br>
Parc Busnes Llanelwy, Sir Ddinbych. LL17 0JJ </span></p>
<p><span style="font-family:'Arial';font-size:7pt;">**********************************************************************</span></p>
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North Wales Fire and Rescue Service<br>
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</span><span style="font-family:'Arial';font-size:7pt;">**********************************************************************</span></p>
<p><span style="font-family:'Arial';font-size:7pt;"> </span></p></body>
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