[strongSwan] help setting up basic VPN on ubuntu

[Imran Akbar]

Success!
I finally got it working by using certificates and following this example:
http://endlessroad1991.blogspot.com/2014/04/setup-ipsec-vpn-on-ec2.html
Still don't know what the issue was with the EAP/PSK config.

many thanks,
imran

On Sun, Nov 30, 2014 at 2:43 PM, Imran Akbar <skunkwerk at gmail.com> wrote:

> Sure Noel,
>
> Here's the complete server log from startup up to and including the
> authentication request: http://pastebin.com/X8a0xunC
> And this is a screenshot
> <https://s3.amazonaws.com/pushbullet-uploads/ujBvnCpT4IC-kZXEDbaZszgiNSnbFKRLvu9QxRtio85p/Screenshot_2014-11-30-14-35-29.png>
> of how I'm connecting via the StrongSwan Android app
>
> yours,
> imran
>
> On Sun, Nov 30, 2014 at 1:23 PM, Noel Kuntze <noel at familie-kuntze.de>
> wrote:
>
>>
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA256
>>
>> Hello Imran,
>>
>> Do you mind posting the complete log from daemon start to the error?
>>
>> And yes, PSK is the easiest way, but if you are experienced with
>> certificates, you can also take that approach.
>>
>>
>> Mit freundlichen Grüßen/Regards,
>> Noel Kuntze
>>
>> GPG Key ID: 0x63EC6658
>> Fingerprint: 23CA BB60 2146 05E7 7278 6592 3839 298F 63EC 6658
>>
>> Am 30.11.2014 um 20:34 schrieb Imran Akbar:
>> > Hey Noel,
>> >     I feel like it's close to working, but still getting the same
>> message after making that change and restarting.  Do you think it's the
>> "config inacceptable" error that's causing authentication to fail, or is it
>> something in my secrets file?
>> >
>> > ipsec.conf now looks like: http://pastebin.com/tUN6jmaS
>> >
>> > the server log says:
>> > Nov 30 19:16:02 ip-172-31-25-2 charon: 14[CFG] looking for peer configs
>> matching 172.31.25.2[%any]...76.126.165.62[app]
>> > Nov 30 19:16:02 ip-172-31-25-2 charon: 14[CFG] selected peer config
>> 'vpn'
>> > Nov 30 19:16:02 ip-172-31-25-2 charon: 14[IKE] peer requested EAP,
>> config inacceptable
>> > Nov 30 19:16:02 ip-172-31-25-2 charon: 14[CFG] no alternative config
>> found
>> > Nov 30 19:16:02 ip-172-31-25-2 charon: 14[IKE] received
>> ESP_TFC_PADDING_NOT_SUPPORTED, not using ESPv3 TFC padding
>> > Nov 30 19:16:02 ip-172-31-25-2 charon: 14[IKE] peer supports MOBIKE
>> > Nov 30 19:16:02 ip-172-31-25-2 charon: 14[ENC] generating IKE_AUTH
>> response 1 [ N(AUTH_FAILED) ]
>> > Nov 30 19:16:02 ip-172-31-25-2 charon: 14[NET] sending packet: from
>> 172.31.25.2[4500] to 76.126.165.62[37721] (76 bytes)
>> >
>> > and the client log says "parsed IKE_AUTH response 1 [ N(AUTH_FAILED) ]
>> >
>> > Is using a PSK the easiest way to setup StrongSwan?  I assumed that was
>> the case, but I tried using certificates as well by following this example (
>> http://kleinerman.org/ipsec-with-strongswan/) but I get stuck at the
>> last step, as the Android app wants a client certificate as well, which I
>> haven't generated.
>> >
>> > thanks again,
>> > imran
>> >
>> >
>> >
>> > On Sun, Nov 30, 2014 at 2:39 AM, Noel Kuntze <noel at familie-kuntze.de
>> <mailto:noel at familie-kuntze.de>> wrote:
>> >
>> >
>> > Hello Imran,
>> >
>> > I gave you wrong information in my last email. I'm sorry.
>> >
>> > The correct setting is "eap-mschapv2", not "eap-mschap".
>> >
>> >
>> > Mit freundlichen Grüßen/Regards,
>> > Noel Kuntze
>> >
>> > GPG Key ID: 0x63EC6658
>> > Fingerprint: 23CA BB60 2146 05E7 7278 6592 3839 298F 63EC 6658
>> >
>> > Am 30.11.2014 um 05:09 schrieb Imran Akbar:
>> > > thanks Noel,
>> >
>> > > I've made those changes and restarted ipsec, but I'm still getting
>> the same error in my server log:
>> >
>> > > "peer requested EAP, config inacceptable"
>> > > "no alternative config found"
>> >
>> > > This is my updated ipsec: http://pastebin.com/TnZaiZX8
>> >
>> > > Does that look correct?
>> >
>> > > appreciate the help,
>> > > imran
>> >
>> > > On Sat, Nov 29, 2014 at 5:47 PM, Noel Kuntze <noel at familie-kuntze.de
>> <mailto:noel at familie-kuntze.de> <mailto:noel at familie-kuntze.de <mailto:
>> noel at familie-kuntze.de>>> wrote:
>> >
>> >
>> > > Hello Imram,
>> >
>> > > If you want to use psk-mschapv2, you need to specify
>> > > leftauth=psk
>> > > rightauth=psk
>> > > rightauth2=eap-mschap
>> >
>> > > Please make sure this is in your configuration.
>> >
>> > > Mit freundlichen Grüßen/Regards,
>> > > Noel Kuntze
>> >
>> > > GPG Key ID: 0x63EC6658
>> > > Fingerprint: 23CA BB60 2146 05E7 7278 6592 3839 298F 63EC 6658
>> >
>> > > Am 30.11.2014 um 02:09 schrieb Imran Akbar:
>> > > > thanks for pointing me in the right direction Noel.
>> >
>> > > > I've installed strongswan-plugin-eap-mschapv2, added
>> rightauth=eap-mschapv2 to my ipsec.conf file, and restart ipsec.
>> > > > I now see the following when I try to connect:
>> >
>> > > > Nov 30 00:29:27 ip-172-31-25-2 charon: 01[CFG] looking for peer
>> configs matching 172.31.25.2[%any]...76.126.165.62[app]
>> > > > Nov 30 00:29:27 ip-172-31-25-2 charon: 01[CFG] selected peer config
>> 'vpn'
>> > > > Nov 30 00:29:27 ip-172-31-25-2 charon: 01[IKE] using configured
>> EAP-Identity app
>> > > > Nov 30 00:29:27 ip-172-31-25-2 charon: 01[IKE] initiating
>> EAP_MSCHAPV2 method (id 0xBE)
>> > > > Nov 30 00:29:27 ip-172-31-25-2 charon: 01[IKE] received
>> ESP_TFC_PADDING_NOT_SUPPORTED, not using ESPv3 TFC padding
>> > > > Nov 30 00:29:27 ip-172-31-25-2 charon: 01[IKE] peer supports MOBIKE
>> > > > Nov 30 00:29:27 ip-172-31-25-2 charon: 01[CFG] no IDr configured,
>> fall back on IP address
>> > > > Nov 30 00:29:27 ip-172-31-25-2 charon: 01[IKE] no private key found
>> for '172.31.25.2'
>> > > > Nov 30 00:29:27 ip-172-31-25-2 charon: 01[ENC] generating IKE_AUTH
>> response 1 [ N(AUTH_FAILED) ]
>> >
>> > > > It seems like I need to tell it to use the username/password,
>> instead of looking for a key... or is a certificate mandatory for all EAP
>> configurations, even using a username/password?
>> >
>> > > > regards,
>> > > > imran
>> >
>> > > > On Sat, Nov 29, 2014 at 4:03 PM, Noel Kuntze <
>> noel at familie-kuntze.de <mailto:noel at familie-kuntze.de> <mailto:
>> noel at familie-kuntze.de <mailto:noel at familie-kuntze.de>> <mailto:
>> noel at familie-kuntze.de <mailto:noel at familie-kuntze.de> <mailto:
>> noel at familie-kuntze.de <mailto:noel at familie-kuntze.de>>>> wrote:
>> >
>> >
>> > > > Hello Imran,
>> >
>> > > > You need to specify rightauth2=eap-mschapv2, so strongSwan is
>> configured correctly to accept
>> > > > eap authentication using mschapv2 in round 2.
>> >
>> > > > You also lack the eap-mschapv2 modules, that you need for
>> eap-mschapv2.
>> > > > Install it via your package manager or, if you built strongSwan
>> yourself, configure the strongSwan sources with --enable-eap-mschapv2,
>> > > > "make uninstall" "make clean" "make" and "make install".
>> >
>> > > > Also, please make sure you send your answer to all parties
>> involved, not just me.
>> >
>> > > > Mit freundlichen Grüßen/Regards,
>> > > > Noel Kuntze
>> >
>> > > > GPG Key ID: 0x63EC6658
>> > > > Fingerprint: 23CA BB60 2146 05E7 7278 6592 3839 298F 63EC 6658
>> >
>> > > > Am 30.11.2014 um 00:54 schrieb Imran Akbar:
>> > > > > Hey Noel and Thomas,
>> >
>> > > > > thanks for your help.
>> > > > > I've made some progress - I'm now getting an "AUTH FAILED" error
>> from my client.
>> > > > > I'm trying to connect via the StrongSwan client on Android using
>> IKEv2 EAP (username/password).
>> >
>> > > > > Here is my ipsec.conf: http://pastebin.com/Ap5gUX0f
>> >
>> > > > > Here is my secrets.conf: http://pastebin.com/hhX9micY
>> >
>> > > > > Here is my server log: http://pastebin.com/W99PPKt3 (looks like
>> the key issue is "peer requested EAP, config inacceptable")
>> >
>> > > > > Here is my client log: http://pastebin.com/2w9NS1Zs
>> >
>> > > > > I'm going to keep tweaking the authentication configs to see if I
>> can make it work.
>> >
>> > > > > yours,
>> > > > > imran
>> >
>> >
>> > > > > On Sat, Nov 29, 2014 at 9:04 AM, Noel Kuntze <
>> noel at familie-kuntze.de <mailto:noel at familie-kuntze.de> <mailto:
>> noel at familie-kuntze.de <mailto:noel at familie-kuntze.de>> <mailto:
>> noel at familie-kuntze.de <mailto:noel at familie-kuntze.de> <mailto:
>> noel at familie-kuntze.de <mailto:noel at familie-kuntze.de>>> <mailto:
>> noel at familie-kuntze.de <mailto:noel at familie-kuntze.de> <mailto:
>> noel at familie-kuntze.de <mailto:noel at familie-kuntze.de>> <mailto:
>> noel at familie-kuntze.de <mailto:noel at familie-kuntze.de> <mailto:
>> noel at familie-kuntze.de <mailto:noel at familie-kuntze.de>>>>> wrote:
>> >
>> >
>> > > > > Hello Imran,
>> >
>> > > > > IPsec/L2TP is mostly used with IKEv1, not IKEv2. Please tell us
>> what clients you're trying to use,
>> > > > > to make sure they try to use IKEv2, too.
>> >
>> > > > > L2TP is not handled by strongSwan. You need to use xl2tp for
>> that. Most clients try to use transport mode
>> > > > > for the IPsec connection. Make sure your peer configuration has
>> that specified. Also, plese make strongSwan
>> > > > > write a log [1] with the settings shown in [2], show us the log
>> that was created and show us your ipsec.conf.
>> >
>> > > > > [1]
>> https://wiki.strongswan.org/projects/strongswan/wiki/LoggerConfiguration
>> >
>> > > > > [2]
>> > > > >                         default = 3
>> > > > >                         mgr = 1
>> > > > >                         ike = 1
>> > > > >                         net = 1
>> > > > >                         enc = 0
>> > > > >                         cfg = 2
>> > > > >                         asn = 1
>> > > > >                         job = 1
>> > > > >                         knl = 1
>> > > > >                         append=no
>> > > > >                         ike_name=no
>> > > > >                         flush_line=yes
>> >
>> >
>> > > > > Mit freundlichen Grüßen/Regards,
>> > > > > Noel Kuntze
>> >
>> > > > > GPG Key ID: 0x63EC6658
>> > > > > Fingerprint: 23CA BB60 2146 05E7 7278 6592 3839 298F 63EC 6658
>> >
>> > > > > Am 29.11.2014 um 17:53 schrieb Imran Akbar:
>> > > > > > Hi everyone,
>> > > > > >     thanks for such a well-developed and maintained library.
>> >
>> > > > > > I'm trying to setup Ipsec/L2TP on my Ubuntu 14 server with
>> IKEv2 and a PSK.
>> >
>> > > > > > I've read through a bunch of tutorials online:
>> > > > > >
>> http://trick77.com/2014/05/04/strongswan-5-vpn-ubuntu-14-04-lts-psk-xauth/
>> > > > > > http://www.foteviken.de/?p=2175
>> > > > > >
>> http://endlessroad1991.blogspot.com/2014/04/setup-ipsec-vpn-on-ec2.html
>> >
>> > > > > > and I've opened up UDP ports 500 & 4500, but I still have
>> clients complaining about gateway timeouts and not being able to connect to
>> the VPN.
>> >
>> > > > > > Is there some sort of a configuration script that can walk you
>> through all the necessary steps to get this working, or a gist that someone
>> could share of their config?
>> > > > > > I don't see anything in my /var/log/auth.conf that's indicative
>> of VPN traffic.
>> >
>> > > > > > yours,
>> > > > > > imran
>> >
>> >
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