We're having issues with our L2TP vpn not working properly. The L2TP vpn connects fine and receives a DHCP IP. But has trouble reconnecting. Or gets connected but can't access anything. This is caused by our dns records holding onto the ip for multiple users. So there's duplicate IPs held by the DNS. The DHCP server doesn't lease it out multiple times. We set the DHCP lease time to four hours from 8. Didn't make a difference. Tried to dynamically update the DNS records by client request. Still get the same issue. Tried to update DNS records every time a user connects. Same issue.
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