Strongswan IPSec problems

speakerbox · 12-18-2011, 04:47 AM

Hi Guys,

Trying to get strongswan working on an Ubuntu box. I have configured the ipsec.conf file as follows:

Code:

config setup
        plutodebug=all
        charonstart=yes
        plutostart=yes

conn %default
        ikelifetime=60m
        keylife=20m
        rekeymargin=3m
        keyingtries=1
        keyexchange=ikev1
        authby=secret



conn net-net
        left=125.xxx.xxx.70
        leftsubnet=192.168.21.170/32
        leftid=@luca
        leftfirewall=yes
        right=121.xxx.xxx.28
        rightsubnet=10.80.50.104/32 
        rightid=@home
        ike=3des-md5,3des-sha
        esp=3des-md5,3des-sha1
        auto=add

The 'left' configuration is the Ubuntu box and the 'right' config is the remote site which is a Cisco router. I can see from the Cisco that it is trying to establish the connection but nothing happens. TCPDUMP shows the traffic hitting the ubuntu box.

Looking through the 'auth.log' file i see lots of errors about something called pluto... specifically this one -

Code:

ipsec_starter[26671]: FATAL ERROR: pluto cannot run without a SHA-1 hasher.
ipsec_starter[26671]: pluto has died -- restart scheduled (5sec)
ipsec_starter[26671]: pluto refused to be started
pluto[30852]: Starting IKEv1 pluto daemon (strongSwan 4.3.2) THREADS SMARTCARD VENDORID CISCO_QUIRKS
pluto[30852]: loading plugin 'aes' failed: /usr/lib/ipsec/plugins/libstrongswan-aes.so: cannot open shared object file: No such file or directory
pluto[30852]: loading plugin 'des' failed: /usr/lib/ipsec/plugins/libstrongswan-des.so: cannot open shared object file: No such file or directory
pluto[30852]: loading plugin 'sha1' failed: /usr/lib/ipsec/plugins/libstrongswan-sha1.so: cannot open shared object file: No such file or directory
pluto[30852]: loading plugin 'md5' failed: /usr/lib/ipsec/plugins/libstrongswan-md5.so: cannot open shared object file: No such file or directory
pluto[30852]: loading plugin 'sha2' failed: /usr/lib/ipsec/plugins/libstrongswan-sha2.so: cannot open shared object file: No such file or directory

Any thoughts on this? It looks like the pluto service can't start due to some missing files.... I can't find any info on this though.

zhjim · 01-18-2012, 09:04 AM

See if you can install the libstrongswan package.

Dunno if ubuntu got something like this. But on missing files I don't have a clue about I visit http://www.debian.org/distrib/packages#search_contents and do a search.

KengaRU · 05-05-2012, 03:10 AM

You could try to disable listed missing plugins in /etc/strongswan.conf. That theoretically should not affect strongswan operation, because the missing plugins des aes sha1 sha2 etc. code is already in openssl libraries as noted in changelog of strongswan debian package source.

Not tested yet, but daemon started without any problem.