[strongSwan] Split tunneling

Fri Oct 22 16:08:29 CEST 2010

Yep, I have the suspicion that there might be an issue with either
the attribute or total packet length.

Andreas

On 22.10.2010 15:47, Claude Tompers wrote:
> So strongswan should send the exact same message, except for the actual string ?
> 
> 
> On Friday 22 October 2010 15:37:46 Andreas Steffen wrote:
>> But if you replace the standard banner by one defined via attr-sql,
>> it fails? Strange!
>>
>> On 22.10.2010 15:04, Claude Tompers wrote:
>>> It still does, if I do not set the attribute, I see the "standard" banner.
>>>
>>> regards,
>>> Claude
>>>
>>>
>>> On Friday 22 October 2010 14:52:36 Andreas Steffen wrote:
>>>> I remember that the default banner "Welcome to Linux strongSwan"
>>>> always worked with the Cisco client, though.
>>>>
>>>> Regards
>>>>
>>>> Andreas
>>>>
>>>>  On 22.10.2010 14:29, Claude Tompers wrote:
>>>>> Hello Andreas,
>>>>>
>>>>> They all fail, as soon as I set one of them (unity_def_domain /
>>>>> banner / unity_split_include). Cisco client says "Negotiating
>>>>> security policies" and it fails. If I don't have any of those
>>>>> attributes set, it immediately passes on to saying "Securing channel
>>>>> communication" and succeeds.
>>>>>
>>>>> kind regards, Claude
>>>>>
>>>>>
>>>>> On Friday 22 October 2010 14:06:55 Andreas Steffen wrote:
>>>>>> Hello Claude,
>>>>>>
>>>>>> it is not evident from the log which attribute[s] the Cisco VPN
>>>>>> client doesn't like. I recommend to remove all Cisco_Unity
>>>>>> attributes from the SQLite database keeping only the virtual IP so
>>>>>> that the negotiation goes on to Quick Mode and then add back the
>>>>>> attributes one-by-one until ModeCfg fails so that the actual error
>>>>>> can be identified.
>>>>>>
>>>>>> I just know that Astaro got the split tunneling working since we
>>>>>> jointly developed the attr-sql functionality but I didn't test the
>>>>>> interoperability with the Chisco client myself.
>>>>>>
>>>>>> Regards
>>>>>>
>>>>>> Andreas
>>>>>>
>>>>>> On 22.10.2010 11:40, Claude Tompers wrote:
>>>>>>> I attached the Ciso log. I think the interesting part starts at
>>>>>>> message 24.
>>>>>>>
>>>>>>> kind regards, Claude
>>>>>>>
>>>>>>>
>>>>>>> On Friday 22 October 2010 11:27:24 Andreas Steffen wrote:
>>>>>>>> Hmmm, it seems that the Cisco client doesn't like strongSwan's
>>>>>>>> ModeCfg reply containing all these Cisco Unity attributes
>>>>>>>> because it just keeps retransmitting the ModeCfg request. Could
>>>>>>>> you find out what errors occur in the Cisco log?
>>>>>>>>
>>>>>>>> Regards
>>>>>>>>
>>>>>>>> Andreas
>>>>>>>>
>>>>>>>> On 22.10.2010 10:48, Claude Tompers wrote:
>>>>>>>>> Hi Andreas,
>>>>>>>>>
>>>>>>>>> Setting the leftsubnet did not work. You can find the pluto
>>>>>>>>> log attached.
>>>>>>>>>
>>>>>>>>> thank you Claude
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Friday 22 October 2010 10:24:24 Andreas Steffen wrote:
>>>>>>>>>> Hello Claude,
>>>>>>>>>>
>>>>>>>>>> could you provide some pluto logs with
>>>>>>>>>>
>>>>>>>>>> plutodebug=all
>>>>>>>>>>
>>>>>>>>>> set in ipsec.conf?
>>>>>>>>>>
>>>>>>>>>> Regards
>>>>>>>>>>
>>>>>>>>>> Andreas
>>>>>>>>>>
>>>>>>>>>> BTW On second thought leftsubnet on the strongSwan gateway 
>>>>>>>>>> should be set to the subnet communicated the Cisco client
>>>>>>>>>> via the unity_split_include attribute since the client will
>>>>>>>>>> probably used them during Quick Mode. I don't know if
>>>>>>>>>> multiple subnets will cause several Quick Modes to be set
>>>>>>>>>> up, though.
>>>>>>>>>>
>>>>>>>>>> Regards
>>>>>>>>>>
>>>>>>>>>> Andreas
>>>>>>>>>>
>>>>>>>>>> On 22.10.2010 09:55, Claude Tompers wrote:
>>>>>>>>>>> Hello Andreas,
>>>>>>>>>>>
>>>>>>>>>>> Thank you for your quick reply. Sadly, it does not work,
>>>>>>>>>>> but I think we're on the right path. The Cisco client
>>>>>>>>>>> tells me "Negotiating security policies" before it stops
>>>>>>>>>>> silently. On the other side, I don't see much in the
>>>>>>>>>>> pluto logs. Any ideas ?
>>>>>>>>>>>
>>>>>>>>>>> kind regards, Claude
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On Thursday 21 October 2010 12:22:56 Andreas Steffen
>>>>>>>>>>> wrote:
>>>>>>>>>>>> Hello Claude,
>>>>>>>>>>>>
>>>>>>>>>>>> yes it should be possible with the Cisco_Unity
>>>>>>>>>>>> functionality added to the attr-sql plugin with
>>>>>>>>>>>> strongswan-4.4.1:
>>>>>>>>>>>>
>>>>>>>>>>>> - Enable the attr-sql and sqlite plugins
>>>>>>>>>>>>
>>>>>>>>>>>> ./configure ... --enable-sqlite --enable-attr-sql
>>>>>>>>>>>>
>>>>>>>>>>>> - Create an SQLite database:
>>>>>>>>>>>>
>>>>>>>>>>>> cat
>>>>>>>>>>>> strongswan-4.4.1/testing/hosts/default/etc/ipsec.d/tables.sql
>>>>>>>>>>>> | sqlite3 /etc/ipsec.d/ipsec.db
>>>>>>>>>>>>
>>>>>>>>>>>> - Define the path to the database in strongswan.conf
>>>>>>>>>>>>
>>>>>>>>>>>> libhydra { plugins { attr-sql { database =
>>>>>>>>>>>> sqlite:///etc/ipsec.d/ipsec.db } } }
>>>>>>>>>>>>
>>>>>>>>>>>> - Create a virtual IP pool in the database using the
>>>>>>>>>>>> ipsec pool tool
>>>>>>>>>>>>
>>>>>>>>>>>> ipsec pool -add mypool --start 10.3.0.1 --end
>>>>>>>>>>>> 10.3.0.254 --timeout 48
>>>>>>>>>>>>
>>>>>>>>>>>> - Add internal DNS and WINS servers
>>>>>>>>>>>>
>>>>>>>>>>>> ipsec pool --addattr dns  --server 10.1.0.10 ipsec pool
>>>>>>>>>>>> --addattr dns  --server 10.1.1.10 ipsec pool --addattr
>>>>>>>>>>>> nbns --server 10.1.0.20 ipsec pool --addattr nbns
>>>>>>>>>>>> --server 10.1.1.20
>>>>>>>>>>>>
>>>>>>>>>>>> - Add default domain
>>>>>>>>>>>>
>>>>>>>>>>>> ipsec pool --addattr unity_def_domain  --string
>>>>>>>>>>>> "strongswan.org"
>>>>>>>>>>>>
>>>>>>>>>>>> - Add welcome banner
>>>>>>>>>>>>
>>>>>>>>>>>> ipsec pool --addattr banner --string "The network will
>>>>>>>>>>>> be down from 6-8 pm"
>>>>>>>>>>>>
>>>>>>>>>>>> - Add split tunneling subnets !!!
>>>>>>>>>>>>
>>>>>>>>>>>> ipsec pool --addattr unity_split_include --subnet 
>>>>>>>>>>>> "10.1.0.0/255.255.0.0,10.3.5.0/255.255.255.0"
>>>>>>>>>>>>
>>>>>>>>>>>> - List all configured attributes
>>>>>>>>>>>>
>>>>>>>>>>>> ipsec pool --statusattr
>>>>>>>>>>>>
>>>>>>>>>>>> - Configure the pool in ipsec.conf
>>>>>>>>>>>>
>>>>>>>>>>>> conn rw-cisco right=%any rightsourceip=%mypool 
>>>>>>>>>>>> leftsubnet=0.0.0.0/0
>>>>>>>>>>>>
>>>>>>>>>>>> I haven't actually tested this with the Cisco VPN
>>>>>>>>>>>> Client but it should work so that only traffic to the
>>>>>>>>>>>> 10.1.0.0/16 and 10.3.5.0/24 networks are tunneled.
>>>>>>>>>>>>
>>>>>>>>>>>> Regards
>>>>>>>>>>>>
>>>>>>>>>>>> Andreas
>>>>>>>>>>>>
>>>>>>>>>>>> On 21.10.2010 10:57, Claude Tompers wrote:
>>>>>>>>>>>>> Hello,
>>>>>>>>>>>>>
>>>>>>>>>>>>> Is it possible to do split tunneling with CISCO VPN
>>>>>>>>>>>>> client and pluto so that a road-warrior is still able
>>>>>>>>>>>>> to access i.e. printers in his local network ?
>>>>>>>>>>>>>
>>>>>>>>>>>>> kind regards Claude
>>>>
>>>> ======================================================================
>>>> Andreas Steffen                         andreas.steffen at strongswan.org
>>>> strongSwan - the Linux VPN Solution!                www.strongswan.org
>>>> Institute for Internet Technologies and Applications
>>>> University of Applied Sciences Rapperswil
>>>> CH-8640 Rapperswil (Switzerland)
>>>> ===========================================================[ITA-HSR]==
>>>>
>>>
>>
>>
>>
> 

-- 
======================================================================
Andreas Steffen                         andreas.steffen at strongswan.org
strongSwan - the Linux VPN Solution!                www.strongswan.org
Institute for Internet Technologies and Applications
University of Applied Sciences Rapperswil
CH-8640 Rapperswil (Switzerland)
===========================================================[ITA-HSR]==