11/3/2022 0 Comments F5 vpn client windows 8.1![]()
We added the dynamic dns credentials after the DC migrations. ![]() F5 VPN CLIENT WINDOWS 8.1 UPDATESo I don’t necessarily know that it matters who really owns the record, just that the DHCP server should be able to update the record. However, I thought the whole point of the dynamic dns account in conjunction with the dnsupdateproxy group was to allow Windows DHCP server to update all records, even if not owned by the server. This makes some sense, because F5 hands out the IPs and somehow changes DNS record ownership since it’s not a Windows DHCP server. So for whatever reason, the dynamic dns account does not have access to edit the A records after the VPN connect & disconnect. F5 VPN CLIENT WINDOWS 8.1 PCWhen I look at the A record for a machine in the error logs, it does NOT display the dynamic dns account on the security ACL for that record - only the PC name (and some other misc default settings). When they come back into the office, DHCP tries to update their A record with the internal IP but fails, resulting in the error above. ![]() When a user connects to VPN, it shows their A record for the VPN connection in DNS. VPN connections are handled by F5 and use a different set of IPs than the Windows DHCP server. I don't know how much that impacts this whole configuration. The only difference for us is that the DNS zones are set to Secure Only and we haven’t fully configured scavenging yet. The link says to configure a domain user account and add it to the advanced DHCP tab settings, add DHCP servers to the DnsUpdateProxy AD group, and set the ACLonProxy to 0 since it is also a DC, etc. We have dynamic DNS configured per the instructions at this link. F5 VPN CLIENT WINDOWS 8.1 REGISTRATION"Forward record registration for IPv4 address ] and FQDN pc. failed with error 9005 (DNS operation refused. It seems like a toss-up as to which IP is specified in the DNS record. All our users have laptops and docking stations. On a side note, we sometimes have issues with DNS and dual NICs. Our primary sysadmin recently left the company, so we aren’t sure how this behaved before the DC upgrade. It’s on the agenda and I’m sure it will help for older records that still haven’t updated. While we have not properly configured scavenging, I have trouble seeing how that would fix this issue unless it was set to a ridiculously low refresh interval, which doesn’t seem like a perfect solution. The DNS service account can’t update the DNS record when the user comes back into the office, so the record shows their VPN IP. Things work fine until VPN is introduced – the record ownership changes to the individual machine once users connect to our VPN. We have dynamic DNS and a service account specified within our DHCP settings, and our two DHCP servers in the DnsUpdateProxy group. I've gone down the rabbit hole researching this and configured dynamic DNS & DHCP per Microsoft and community recommendations. We are getting DHCP errors, event ID 20319 'Name Registration' for Forward record registrations. We have DC1 as primary DHCP server and DC2 as hot-standby failover. We recently upgraded our DCs from 2008r2 to 2016.
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