Title: Site to client VPN will not connect. L2TP - [Print this page] Author: anthony@smartmo Time: 2025-9-23 08:48 Title: Site to client VPN will not connect. L2TP - l2tp connection attempt failed because the security layer encountered a processing error during negotiations.
I have upgraded the firmware, put the client machine on a different internet source, Set up the connection on a different PC, rebooted the router. Currently, we are using the Ruijie DNS name but i have also tried the WAN IP address too.
What else can i try?
Regards
Anthony Author: v-xiewenyu@ruij Time: 2025-9-23 09:51
Dear sir,
Good day.
You may check this guide to troubleshoot: https://community.ruijie.com/forum.php?mod=viewthread&tid=8055&extra=page%3D1
Best regards,
Lex Author: anthony@smartmo Time: 2025-9-23 12:41
thanks for your assistance. The connection has been working so im confident that the settings are right.
how do i do this ?
The traffic of VPN port is disabled by the uplink network
Draw a package on EG to check whether the EG normally sends and receives packets. If packets are sent but not received, you need to contact the ISP to check whether the uplink device disable the L2TP VPN UDP 1701 port
it might be an NBN issue
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