[Swan] Issue with networkmanager and l2tp

Mon Oct 26 15:25:59 UTC 2020

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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