[Swan] Issue with networkmanager and l2tp

Mon Oct 26 15:54:35 UTC 2020

That is a configuration mismatch. So the end that is doing the wrong intention should change - I can’t tell which end that is

Sent from my iPhone

> On Oct 26, 2020, at 11:26, Brian McKee <raydude at gmail.com> wrote:
> 
> 
> Hi Paul,
> I have to admit, I misunderstood way back in the beginning and made too many changes to the ebuild. I thought that the whole config directory had moved, when it was only the nss directory. I have sorted that out now. All I had to do was have the ebuild create the /var/lib/ipsec/nss directory just like you suggested.
> 
> All that is sorted out now. Here is the latest error message. 
> 
> Oct 26 08:11:27.500126: loading secrets from "/etc/ipsec.secrets"
> Oct 26 08:11:27.500164: loading secrets from "/etc/ipsec.d/ipsec.nm-l2tp.secrets"
> Oct 26 08:11:27.511475: added IKEv1 connection "9a088450-2a7b-4012-befe-facf564c77e0"
> Oct 26 08:11:27.522480: "9a088450-2a7b-4012-befe-facf564c77e0" #1: initiating IKEv1 Main Mode connection
> Oct 26 08:11:27.522658: "9a088450-2a7b-4012-befe-facf564c77e0" #1: sent Main Mode request
> Oct 26 08:11:28.023076: "9a088450-2a7b-4012-befe-facf564c77e0" #1: STATE_MAIN_I1: retransmission; will wait 0.5 seconds for response
> Oct 26 08:11:28.029379: "9a088450-2a7b-4012-befe-facf564c77e0" #1: sent Main Mode I2
> Oct 26 08:11:28.530045: "9a088450-2a7b-4012-befe-facf564c77e0" #1: STATE_MAIN_I2: retransmission; will wait 0.5 seconds for response
> Oct 26 08:11:28.593729: "9a088450-2a7b-4012-befe-facf564c77e0" #1: sent Main Mode I3
> Oct 26 08:11:28.689015: "9a088450-2a7b-4012-befe-facf564c77e0" #1: Peer ID is ID_IPV4_ADDR: '[[server ip_address]]'
> Oct 26 08:11:28.689218: "9a088450-2a7b-4012-befe-facf564c77e0" #1: IKE SA established {auth=PRESHARED_KEY cipher=AES_CBC_256 integ=HMAC_SHA1 group=MODP2048}
> Oct 26 08:11:28.689336: "9a088450-2a7b-4012-befe-facf564c77e0" #2: initiating Quick Mode PSK+ENCRYPT+PFS+UP+IKEV1_ALLOW+IKE_FRAG_ALLOW+ESN_NO {using isakmp#1 msgid:84d31f03 proposal=AES_CBC_256-HMAC_SHA1_96, AES_CBC_128-HMAC_SHA1_96, 3DES_CBC-HMAC_SHA1_96 pfsgroup=MODP2048}
> Oct 26 08:11:28.692241: "9a088450-2a7b-4012-befe-facf564c77e0" #2: sent Quick Mode request
> Oct 26 08:11:29.193066: "9a088450-2a7b-4012-befe-facf564c77e0" #2: STATE_QUICK_I1: retransmission; will wait 0.5 seconds for response
> Oct 26 08:11:29.586945: "9a088450-2a7b-4012-befe-facf564c77e0" #2: NAT-Traversal: received 2 NAT-OA. Ignored because peer is not NATed
> Oct 26 08:11:29.587049: "9a088450-2a7b-4012-befe-facf564c77e0" #2: our client subnet returned doesn't match my proposal - us: [[machine home net IP addy]]/32 vs them: [[my internet IP address]]/32
> Oct 26 08:11:29.587089: "9a088450-2a7b-4012-befe-facf564c77e0" #2: sending encrypted notification INVALID_ID_INFORMATION to [[server ip_address]]:4500
> Oct 26 08:11:29.587339: "9a088450-2a7b-4012-befe-facf564c77e0" #2: deleting state (STATE_QUICK_I1) aged 0.898044s and NOT sending notification
> Oct 26 08:11:29.587451: "9a088450-2a7b-4012-befe-facf564c77e0" #2: ERROR: netlink response for Del SA esp.cfdd97dd@[[server ip_address]] included errno 3: No such process
> Oct 26 08:11:43.789943: "9a088450-2a7b-4012-befe-facf564c77e0": terminating SAs using this connection
> Oct 26 08:11:43.790008: "9a088450-2a7b-4012-befe-facf564c77e0" #1: deleting state (STATE_MAIN_I4) aged 16.267541s and sending notification
> 
> This looks like a configuration error as the remote host is confused about my home network IP address and my internet IP address.
> 
> We're close, I think. Thanks again for your help.
> 
>> On Mon, Oct 26, 2020 at 7:04 AM Paul Wouters <paul at nohats.ca> wrote:
>> On Sun, 25 Oct 2020, Brian McKee wrote:
>> 
>> > THANKS! That was a great idea!I found this in /var/log/pluto.log: (Let me know if you need to see more, this is
>> > just the end of it)
>> 
>> > Oct 25 15:47:46.268455: "9a088450-2a7b-4012-befe-facf564c77e0" #1: initiating IKEv1 Main Mode connection
>> > Oct 25 15:47:46.268593: "9a088450-2a7b-4012-befe-facf564c77e0" #1: sent Main Mode request
>> > Oct 25 15:47:46.339726: "9a088450-2a7b-4012-befe-facf564c77e0" #1: Can't authenticate: no preshared key found
>> > for `10.1.10.221' and `[[IP_ADDRESS]]'.  Attribute OAKLEY_AUTHENTICATION_METHOD
>> 
>> Your machine cannot find it's own PSK ?
>> 
>> Normally, NetworkManager writes a secrets file that is read via the
>> include statement in /etc/ipsec.secrets for /etc/ipsec.d/*.secrets
>> and then it runs "ipsec secrets" to re-read it, and it deletes the file
>> again.
>> 
>> Perhaps libreswan was compiled with ipsecddir at a different location?
>> 
>> > Based on this, I guess there's a pre-shared-key issue. But I set that in kde's network manager's systems
>> > settings module. Is it possible that the PSK has changed location in the conf files?
>> 
>> check if you have an /etc/ipsec.secrets file and if it has an include
>> line for /etc/ipsec.d/*.secrets ?
>> 
>> You can always drop in a permanent file or entry in /etc/ipsec.secrets
>> with:
>> 
>>         0.0.0.0  [[IP_ADDRESS]] : PSK "yourstrongsecret"
>> 
>> Paul
> 
> 
> -- 
> -- Consciousness moves everything.
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