Hi guys,
I'd like to know your steps or even fix from you to a problem that doesn't belong to me just my co-worker and I wanna help him but I don't know solution, either.
My co-worker made L2TP / IPSEC server with NAT-T (basically allowing port 4500 UDP) at company A. When a person from company B connects to company A through VPN, it's good. When a second person from company B connects to company A through VPN it lasts only for a while and then a second connected user kicks the first connected user. Only one connection can last. So we connected too and we could be there. We weren't connected from company B but from another location.
From the description you can see one thing. Two people from company B have the same public IP (NAT) so it's the problem. I'm asking... why? The same IP shouldn't be a problem because we have ports. Could be problem on their firewall or on the server side?
How I told you. The first user can be here as long as others connect from the same company.
Please, consider everything.
Thank you :)
EDIT: Server made on a MikroTik router. It seems like issue associated with the brand.
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