Max concurrent users

GaretAPFM

Hi everybody,

I'm brand new here, so bear with me. I'm starting some research into an AWS-based VPN solution for my company. We've attempted two other solutions in AWS (Cisco's CSR and F5's APM device) and both failed at meeting our company's needs.

The basic set-up is that we have around ~500 concurrent end-users who need access to our company intranet. These users live and work around the US and Canada. Currently everybody connects via a physical Cisco IPSEC connection to a Cisco ASA, which works fine but needs to be deprecated due to a shift in our IT infrastructure. The primary use for the VPN connection is to access our company CRM (port 80) and a few other services.

The Cisco CSR failed due to an (at the time) undocumented limit to concurrent SSL VPN connections on the virtual device. After having to toss the ticket to their developers for testing, Cisco came back and told us only 200 users would be able to connect concurrently to the device. Since we have ~500 users, we had to scrap the whole plan.

Next was the F5 APM, which never even got far enough for us to put load onto it. F5 was unable to correctly install the virtual device in AWS, so we had to ditch them as well. We're not sure why they sold a product they couldn't support, but I digress.

Now we're eyeballing OpenVPN. It sounds like there are use-cases out there where people have 100's of concurrent connections with no issues. Is there any way we can get absolute confirmation as to the number of concurrent VPN connections OpenVPN supports?

Thanks!

-Garet

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GaretAPFM wroteIs there any way we can get absolute confirmation as to the number of concurrent VPN connections OpenVPN supports?

You can read the source code :mrgreen: ..

But seriously, your best bet would be to ask the devs on the developer mailing list.

In advance of that, I know OpenVPN can support in excess of 4000 users .. so ~500 should be no issue.
But be aware, it is a work in progress and it is open source based on openssl .. so there will be surprises !