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<p class="MsoNormal">Hi there,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My situation is an odd one. I have on my desktop a Linux Virtual Machine (Debian) running in virtual box which I need to setup a IPSec/l2tp VPN client thus to be able to provide guidance to external users to set up their connections.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">In virtualbox I have set rules to forward the ports 50, 51, 500 and 4500 to the VM.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have an officeVPN.conf file which looks like:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">conn officeVPN<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"> aggressive=yes<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"> type=tunnel <o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"> authby=psk <o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"> keyexchange=ikev1<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"> left=%defaultroute <o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"> leftprotoport=udp/l2tp <o:p>
</o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"> right= 50.45.0.51<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"> rightprotoport=udp/l2tp <o:p>
</o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"> auto=add<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">An officeVPN.secrets that looks like:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">: PSK "StrongKey-Honest!"<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">An /etc/strongswan.conf that has the following line:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">i_dont_care_about_security_and_use_aggressive_mode_psk=yes<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Then the ipsec up officeVPN command is run:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"># ipsec up officeVPN<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">Initiating Aggressive Mode IKE_SA officeVPN[1] to 50.54.0.51<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">Generating AGGRESSIVE request 0 [ SA KE No ID V V V V V ]<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending packet: from a.b.c.d [500] to 50.45.0.51[500] (320 bytes)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending retransmit 1 of request message ID 0, seq 1
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending packet: from a.b.c.d [500] to 50.45.0.51[500] (320 bytes)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending retransmit 2 of request message ID 0, seq 1
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending packet: from a.b.c.d [500] to 50.45.0.51[500] (320 bytes)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending retransmit 3 of request message ID 0, seq 1
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending packet: from a.b.c.d [500] to 50.45.0.51[500] (320 bytes)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending retransmit 4 of request message ID 0, seq 1
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending packet: from a.b.c.d [500] to 50.45.0.51[500] (320 bytes)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending retransmit 5 of request message ID 0, seq 1<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">giving up after 5 retransmits<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">peer not responding, trying again (2/3)
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">Initiating Aggressive Mode IKE_SA officeVPN[1] to 50.54.0.51<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">Generating AGGRESSIVE request 0 [ SA KE No ID V V V V V ]<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending packet: from a.b.c.d [500] to 50.45.0.51[500] (320 bytes)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending retransmit 1 of request message ID 0, seq 1
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending packet: from a.b.c.d [500] to 50.45.0.51[500] (320 bytes)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending retransmit 2 of request message ID 0, seq 1
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending packet: from a.b.c.d [500] to 50.45.0.51[500] (320 bytes)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending retransmit 3 of request message ID 0, seq 1
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending packet: from a.b.c.d [500] to 50.45.0.51[500] (320 bytes)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending retransmit 4 of request message ID 0, seq 1
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending packet: from a.b.c.d [500] to 50.45.0.51[500] (320 bytes)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending retransmit 5 of request message ID 0, seq 1<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">giving up after 5 retransmits<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">peer not responding, trying again (3/3)
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">Initiating Aggressive Mode IKE_SA officeVPN[1] to 50.54.0.51<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">Generating AGGRESSIVE request 0 [ SA KE No ID V V V V V ]<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending packet: from a.b.c.d [500] to 50.45.0.51[500] (320 bytes)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending retransmit 1 of request message ID 0, seq 1
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending packet: from a.b.c.d [500] to 50.45.0.51[500] (320 bytes)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending retransmit 2 of request message ID 0, seq 1
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending packet: from a.b.c.d [500] to 50.45.0.51[500] (320 bytes)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending retransmit 3 of request message ID 0, seq 1
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending packet: from a.b.c.d [500] to 50.5.0.51[500] (320 bytes)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending retransmit 4 of request message ID 0, seq 1
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending packet: from a.b.c.d [500] to 50.45.0.51[500] (320 bytes)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">sending retransmit 5 of request message ID 0, seq 1<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">giving up after 5 retransmits<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">establishing IKE_SA failed, peer not responding<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">establishing connection ‘officeVPN’ failed.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">From the logs I get lines like:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">Starting strongSwan 5.7.2 IPsec [starter]…<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">Starting IKE charon daemon (strongSwan 5.7.2, Linux 4.19.0-5-amd64, x86-64)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">loading ca certificates from ‘/etc/ipsec.d/cacerts’<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">loading aa certificates from ‘/etc/ipsec.d/aacerts’<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">loading ocsp signer certificates from ‘/etc/ipsec.d/ocspcerts’<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">loading attribute certificates from ‘/etc/ipsec.d/acerts’<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">loading crls from ‘/etc/ipsec.d/crls’<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">loading secrets from ‘/etc/ipsec.d/officeVPN.sercrets’<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"> loading IKE secret for officeVPN 50.45.0.51<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">loaded plugins: charon aesni aes rc2 sha2 sha1 md5 mgf1 random nonce x509 revocation…<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">dropped capabilities, running as uid 0, gid 0<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">spawning 16 worker threads<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">charon (1499) started after 20 ms<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">received stroke: add connection ‘officeVPN’<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">added configuration ‘officeVPN’<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt">received stroke: initiate ‘officeVPN’<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Where a.b.c.d is the local IP of the host and 50.54.0.51 is the VPN server.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Nothing that I have tried has had a positive effect. Thank you for your patience. I may be going about this wholly the wrong way, so any suggestions would be gratefully received.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thank you.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#1F497D;mso-fareast-language:EN-GB">--<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#1F497D;mso-fareast-language:EN-GB">Stephen Feyrer</span></b><b><span style="color:#1F497D;mso-fareast-language:EN-GB"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#A6A6A6;mso-fareast-language:EN-GB">DevOps Engineer</span><span style="color:#1F497D;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#A6A6A6;mso-fareast-language:EN-GB">Greensill Capital<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#A6A6A6;mso-fareast-language:EN-GB"><a href="mailto:stephen.feyrer@greensill.com"><span style="color:#0563C1">stephen.feyrer@greensill.com</span></a></span><span style="color:#1F497D;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#A6A6A6;mso-fareast-language:EN-GB"><a href="http://www.greensill.com"><span style="color:#0563C1">http://www.greensill.com</span></a>
<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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