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Instituto Cultural Argentino Norteamericano

Windows 2008 vpn server l2tp

by alexbotovanka
Thursday 20 of December, 2018
It’s useful to keep your VPN clients on a different subnet to your servers, however multihoming with several NICs can cause problems, particularly if your RRAS server is also a Domain Controller. You can define a subnet for this purpose in the IPv4 tab here, but you will need to remember to add a static route entry on your router pointing traffic for this subnet to the RRAS server.
Wondered if you had just determined this on your own out of trial-and-error (as we had to) or if you’d found a reference that stated that the less-secure MSCHAP v2 needed to be enabled for Mac OS X (or in your case, iOS) clients.
– I did some more troubleshooting from home and discovered that when a tunnel is initiated from a second device on my home network while another tunnel is already up, all further connection attempts then fail for a long while, even when the RRAS server is rebooted. This would suggest that the Netscreen firewall at my work still considers the original session open, and thus it will eventually timeout after 30 minutes. This behaviour had windows 2008 vpn server l2tp disrupted my Mac OS X test results. Using verbose logging on the Mac and looking at the NPS log I could see that Mac OS X 10.6.8 VPN client does not accept the 128bit encryption setting. Permitting 56bit encryption allows Macs to connect, but perhaps older versions of Mac OS could have difficulties. I have updated the policy settings screenshot above.
but I could not get it to work. It’s possible that this is all out of date information though.
– I realised that although NATed clients could connect, clients with public addresses could not. I have amended the destination ports for IP protocols 50 and 51 in the firewall IPsec definition screenshot (it had defaulted to 0-0 rather than 0-65535 for some reason). I have verified that this VPN works for Windows XP clients, Windows 7, Mac OS X 10.6, and Mac OS X 10.5, as well as iPhones (mine’s on iOS 3.1.3) and iPads. Once connected to the RRAS server you cannot interact with that server directly, so make sure that the RRAS server’s own DNS settings do not refer to itself as a primary (assuming it’s also a DNS server) – these DNS entries will be inherited by all VPN clients.
I had considered using Apple’s support for Cisco IPsec but that would have meant exposing the core switch where I work. It’s old enough to make that a bad idea. The Juniper Netscreen firewall only supports L2TP with certificates and not Pre-Shared Key so that was also ruled out. This post will outline how to configure Windows Server 2008 R2’s role to host L2TP/IPsec connections which will allow iPads and iPhones to connect securely into your Windows infrastructure without the need for additional client software.
Is EAP-MSCHAPv2 in a PPTP context the same as what Wikipedia calls ? Wonder if I’d have more luck searching for “mac os x pptp peapv0″…
– I did some more troubleshooting from home and discovered that when a tunnel is initiated from a second device on my home network while another tunnel is already up, all further connection attempts then fail for a long while, even when the RRAS server is rebooted. This would suggest that the Netscreen firewall at my work still considers the original session open, and thus it will eventually timeout after 30 minutes. This behaviour had disrupted my Mac OS X test results. Using verbose logging on the Mac and looking at the NPS log I could see that Mac OS X 10.6.8 VPN client does not accept the 128bit encryption setting. Permitting 56bit encryption allows Macs to connect, but perhaps older versions of Mac OS could have difficulties. I have updated the policy settings screenshot above.
I would at this point like to thoroughly recommend as being the best iOS Remote Desktop client I have seen. It has NLA authentication support, a universal iPad/iPhone binary, and by far the most intuitive controls which really puts it ahead of the competition.
Второй недостаток, вытекающий из первого - невозможность проверить подлинность подключающегося хоста, т.е. администратор не может с уверенностью сказать, что данное подключение выполнено пользователем Иванов со служебного ноутбука, а не злоумышленником, получившим доступ к учетным данным.
Doesn’t help that a web search for “” turns up… um, nothing very helpful at all. At least that doesn’t pertain to 802.1x, which I want nothing to do with.

Остальные параметры мы подробно рассматривать не будем, так как подробно рассматривали их в посвященной настройке PPTP-сервера. Применяем изменения, перезапускам службу.

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