Re: 32bit vs 64bit Linux

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Author: Lisa Kachold
Date:  
To: Main PLUG discussion list
Subject: Re: 32bit vs 64bit Linux
Stephen,

On Fri, May 31, 2013 at 8:07 PM, Stephen <> wrote:

> How well does it play with Cisco as an alternative to the anyconnect
> application?
>

You don't *have* to use the Cisco provided client (as you already well
know) there's VPNC as well, which works *very* well under linux, and is
insanely easy to build, configure and run.

Generally, OpenVPN is a SSL VPN and Cisco uses IPSEC, but that doesn't mean
it's not possible. Most all of Cisco's newer VPN offerings support SSL VPN.


Do you have a specific Cisco VPN device in mind? Or do you mean any Cisco
VPN device?

If you mean a VPN 3000 concentrator, I would say no.
If you mean an ASA device, I would say yes.
If you mean a IOS device, I would say maybe. (Depending on version and a
good deal of tinkering)
If you mean a PIX device, I would say maybe. (Depending on version and a
good deal of banging head against wall)

*Technically "it's not supported". But the "not supported" tag (primarily
used to reduce costs of large businesses trying to train their
non-technical customers to use anything more complex than an off/on button)
is clearly not any limitation for linux people? *

Just go with a Cisco compatible client!

OpenConnect is still a very good product, and I would choose it over
Cisco's client any day!
http://www.infradead.org/openconnect/

Also, you can allow OpenVPN through the cisco firewall and run both IPSEC
and SSL VPN, by getting a nice OpenVPNAS Virtual Appliance, you will be up
and running in 1/2 hour, plus your users can go right to the VPN server and
authenticate and download their clients without any big fuss. Just because
you have a Cisco VPN available, doesn't mean you must use that IPSEC
virtual private tunnel exclusively. Once you allow SSL VPN, you can use a
quick setup OpenVPN AS Server:

Here's what the OpenVPN Access Server looks like:
https://12.159.65.84/?src=connect PLUG HackFest VPN services for Labs in
the DeVry Rack at OneNeck Hosting.

Reference: http://www.unix-ag.uni-kl.de/~massar/vpnc/
Installation Reference vpnc Ubuntu:
http://www.ed.ac.uk/schools-departments/information-services/services/computing/desktop-personal/vpn/vpn-cisco-client/vpn-cisco-ubuntu
Cisco VPN FAQ:
http://www.cisco.com/en/US/products/sw/secursw/ps2308/products_qanda_item09186a00801c2dbe.shtml

Examples of 64bit OS Cisco client issues:
http://micro.stanford.edu/wiki/How_to_install_and_configure_the_Cisco_VPN_client_on_a_Linux_computer#64-bit_operating_system_errors


> On May 31, 2013 5:23 PM, "Lisa Kachold" <> wrote:
>
>> Stephen,
>>
>> On Fri, May 31, 2013 at 2:11 PM, Stephen Rufle <>wrote:
>>
>>> My only compatibly issue was getting the VPN tunnel that my job uses
>>> to work in 64 bit.
>>> Juniper network-connect software on Ubuntu not sure what version, but it
>>> was around 2011. My advice is to do a 64 bit install and then do a tests
>>> with your personal list of high priority software.
>>>
>>
>> OpenVPN works wonderfully with Juniper VPN's; completely supplanting the
>> Network-Connect application.
>>
>> http://vpnthebestvpn.com/vpn1/juniper-vpn-64-bit.html
>>
>>>
>>>
>>> On 5/31/13 9:28 AM, keith smith wrote:
>>>
>>>
>>> Hi,
>>>
>>> Even though I have 64bit hardware I always install the 32bit version of
>>> Linux. I do so because of the past discussions on this list that made me
>>> believe the 32bit OS was better because 64bit caching is actually slower
>>> due to the requirement that the cache be filled to a certain point before
>>> it is moved. I think I recall something about the amount of RAM having
>>> some effect here also.
>>>
>>> Using a 32bit version over a 64bit version seems counter intuitive,
>>> however that is what I have taken away from these conversations about 32bit
>>> vs 64bit Linux.
>>>
>>> I'm using CentOS 6.x on a LAMP server that gets a low amount of
>>> traffic. However I may make the jump to Linux on my desktop this summer.
>>> (this will be my 3rd attempt to become M$ free except one VM so I can use
>>> IE for testing) I think all of my hardware is 64bit.
>>>
>>> So that begs the question, is 32bit better than 64bit or do I not
>>> understand the issue?
>>>
>>> Thank you for your feedback.
>>>
>>> Keith
>>>
>>> ------------------------
>>> Keith Smith
>>>
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>>
>>
>>
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