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Client VPN issue with PIX v6.3

 

 

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graham at g-rock

Nov 29, 2009, 7:53 PM

Post #1 of 6 (532 views)
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Client VPN issue with PIX v6.3

Hi all,

One of my VPN devices is a 525 running v6.3.5. I am having an issue with
Client VPN sessions coming in on the outside interface while accessing
subnets that are reached by outside interface. I can access the "inside"
interface addresses just fine. Is there some sort of limitation that I
can't access subnets out past the outside interface while having VPN
sessions terminating on the same interface? I tried to add these subnets to
the split-tunnel acl with no love either.

Thoughts? I have a v7.0.2 525 that is being tied up with another setup, so
I can't test on 7.x code - but if if an upgrade is needed to solve this, let
me know...

Thanks!

-graham


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randy_94108 at yahoo

Nov 29, 2009, 8:06 PM

Post #2 of 6 (495 views)
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Re: Client VPN issue with PIX v6.3 [In reply to]

--- On Sun, 11/29/09, Graham Wooden <graham [at] g-rock> wrote:


From: Graham Wooden <graham [at] g-rock>
Subject: [c-nsp] Client VPN issue with PIX v6.3
To: "cisco-nsp" <cisco-nsp [at] puck>
Date: Sunday, November 29, 2009, 7:53 PM


Hi all,

One of my VPN devices is a 525 running v6.3.5.  I am having an issue with
Client VPN sessions coming in on the outside interface while accessing
subnets that are reached by outside interface. I can access the "inside"
interface addresses just fine.  Is there some sort of limitation that I
can't access subnets out past the outside interface while having VPN
sessions terminating on the same interface?  I tried to add these subnets to
the split-tunnel acl with no love either.

Thoughts?  I have a v7.0.2 525 that is being tied up with another setup, so
I can't test on 7.x code - but if if an upgrade is needed to solve this, let
me know...

Thanks!

-graham


_______________________________________________

Hi Graham,
If memory serves me, hairpinning(same-security-traffic permit intra-interface) in a pix is only supported on 7.x and above.
Regards,
./Randy
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zeusdadog at gmail

Nov 29, 2009, 8:18 PM

Post #3 of 6 (508 views)
Permalink
Re: Client VPN issue with PIX v6.3 [In reply to]

I think pix can't send traffic out the same interface it came in.

On 11/29/09, Graham Wooden <graham [at] g-rock> wrote:
> Hi all,
>
> One of my VPN devices is a 525 running v6.3.5. I am having an issue with
> Client VPN sessions coming in on the outside interface while accessing
> subnets that are reached by outside interface. I can access the "inside"
> interface addresses just fine. Is there some sort of limitation that I
> can't access subnets out past the outside interface while having VPN
> sessions terminating on the same interface? I tried to add these subnets to
> the split-tunnel acl with no love either.
>
> Thoughts? I have a v7.0.2 525 that is being tied up with another setup, so
> I can't test on 7.x code - but if if an upgrade is needed to solve this, let
> me know...
>
> Thanks!
>
> -graham
>
>
> _______________________________________________
> cisco-nsp mailing list cisco-nsp [at] puck
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>
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td_miles at yahoo

Nov 29, 2009, 8:33 PM

Post #4 of 6 (489 views)
Permalink
Re: Client VPN issue with PIX v6.3 [In reply to]

Hi Graham,

If I understand correctly then you're saying that when you have a VPN client session open you can't access subnets that are on the outside of your PIX from the client that has the VPN session up ?

Would the subnet in question be accessible from the client if it did NOT use a VPN tunnel (ie. is the subnet a generally accessible Internet address) ?

If the subnet is accessible without the client tunnel up, then what you need is split tunneling. If this isn't working then you need to look at why it isn't.

If this isn't what you want, and you actually WANT traffic to go from client across the VPN tunnel to PIX and then back out the outside interface then a 6.3 won't support this.

You need to have at least 7.2.1 or higher code and use the command:

same-security-traffic permit intra-interface

http://www.cisco.com/en/US/products/ps6120/products_tech_note09186a0080734db7.shtml
http://www.cisco.com/en/US/docs/security/asa/asa72/command/reference/s1_72.html#wp1289167


regards,
Tony.


--- On Mon, 30/11/09, Graham Wooden <graham [at] g-rock> wrote:

> From: Graham Wooden <graham [at] g-rock>
> Subject: [c-nsp] Client VPN issue with PIX v6.3
> To: "cisco-nsp" <cisco-nsp [at] puck>
> Received: Monday, 30 November, 2009, 2:53 PM
> Hi all,
>
> One of my VPN devices is a 525 running v6.3.5.  I am
> having an issue with
> Client VPN sessions coming in on the outside interface
> while accessing
> subnets that are reached by outside interface. I can access
> the "inside"
> interface addresses just fine.  Is there some sort of
> limitation that I
> can't access subnets out past the outside interface while
> having VPN
> sessions terminating on the same interface?  I tried
> to add these subnets to
> the split-tunnel acl with no love either.
>
> Thoughts?  I have a v7.0.2 525 that is being tied up
> with another setup, so
> I can't test on 7.x code - but if if an upgrade is needed
> to solve this, let
> me know...
>
> Thanks!
>
> -graham
>
>
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp [at] puck
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>


__________________________________________________________________________________
Win 1 of 4 Sony home entertainment packs thanks to Yahoo!7.
Enter now: http://au.docs.yahoo.com/homepageset/

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tvarriale at comcast

Nov 29, 2009, 8:33 PM

Post #5 of 6 (492 views)
Permalink
Re: Client VPN issue with PIX v6.3 [In reply to]

PIX code below 7 doesn't support hairpinning.

tv
----- Original Message -----
From: "Graham Wooden" <graham [at] g-rock>
To: "cisco-nsp" <cisco-nsp [at] puck>
Sent: Sunday, November 29, 2009 9:53 PM
Subject: [c-nsp] Client VPN issue with PIX v6.3


> Hi all,
>
> One of my VPN devices is a 525 running v6.3.5. I am having an issue with
> Client VPN sessions coming in on the outside interface while accessing
> subnets that are reached by outside interface. I can access the "inside"
> interface addresses just fine. Is there some sort of limitation that I
> can't access subnets out past the outside interface while having VPN
> sessions terminating on the same interface? I tried to add these subnets
> to
> the split-tunnel acl with no love either.
>
> Thoughts? I have a v7.0.2 525 that is being tied up with another setup,
> so
> I can't test on 7.x code - but if if an upgrade is needed to solve this,
> let
> me know...
>
> Thanks!
>
> -graham
>
>
> _______________________________________________
> cisco-nsp mailing list cisco-nsp [at] puck
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/

_______________________________________________
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https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/


graham at g-rock

Nov 29, 2009, 8:42 PM

Post #6 of 6 (491 views)
Permalink
Re: Client VPN issue with PIX v6.3 [In reply to]

Right, the subnet that I need access to is not publically routable but is on
outside of this particular interface.

Thanks to you and everyone that chimed in. I am going to see if I can
re-purpose my other 525 running 7.0.2 and get it upgraded to 7.2 or do an
upgrade on this one.

-graham


On 11/29/09 10:33 PM, "Tony" <td_miles [at] yahoo> wrote:

> Hi Graham,
>
> If I understand correctly then you're saying that when you have a VPN client
> session open you can't access subnets that are on the outside of your PIX from
> the client that has the VPN session up ?
>
> Would the subnet in question be accessible from the client if it did NOT use a
> VPN tunnel (ie. is the subnet a generally accessible Internet address) ?
>
> If the subnet is accessible without the client tunnel up, then what you need
> is split tunneling. If this isn't working then you need to look at why it
> isn't.
>
> If this isn't what you want, and you actually WANT traffic to go from client
> across the VPN tunnel to PIX and then back out the outside interface then a
> 6.3 won't support this.
>
> You need to have at least 7.2.1 or higher code and use the command:
>
> same-security-traffic permit intra-interface
>
> http://www.cisco.com/en/US/products/ps6120/products_tech_note09186a0080734db7.
> shtml
> http://www.cisco.com/en/US/docs/security/asa/asa72/command/reference/s1_72.htm
> l#wp1289167
>
>
> regards,
> Tony.
>
>
> --- On Mon, 30/11/09, Graham Wooden <graham [at] g-rock> wrote:
>
>> From: Graham Wooden <graham [at] g-rock>
>> Subject: [c-nsp] Client VPN issue with PIX v6.3
>> To: "cisco-nsp" <cisco-nsp [at] puck>
>> Received: Monday, 30 November, 2009, 2:53 PM
>> Hi all,
>>
>> One of my VPN devices is a 525 running v6.3.5.  I am
>> having an issue with
>> Client VPN sessions coming in on the outside interface
>> while accessing
>> subnets that are reached by outside interface. I can access
>> the "inside"
>> interface addresses just fine.  Is there some sort of
>> limitation that I
>> can't access subnets out past the outside interface while
>> having VPN
>> sessions terminating on the same interface?  I tried
>> to add these subnets to
>> the split-tunnel acl with no love either.
>>
>> Thoughts?  I have a v7.0.2 525 that is being tied up
>> with another setup, so
>> I can't test on 7.x code - but if if an upgrade is needed
>> to solve this, let
>> me know...
>>
>> Thanks!
>>
>> -graham
>>
>>
>> _______________________________________________
>> cisco-nsp mailing list  cisco-nsp [at] puck
>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>
>
>
>
> ______________________________________________________________________________
> ____
> Win 1 of 4 Sony home entertainment packs thanks to Yahoo!7.
> Enter now: http://au.docs.yahoo.com/homepageset/
>


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