Yes, you need a quad A record in DNS for IPv6. From your Guacamole box you should be able to do:
$ dig @ip.of.my.dns.server name.of.my.rds.box AAAA ... and get an answer. Substitute the IP address of your DNS server or its name and the name of your RDS box. I have no idea if Guac actually supports IPv6 but you will need DNS to work if you want to use the hostname! Cheers Jon On Thu, 2025-06-19 at 11:43 +0530, Savinder Kaur wrote: I’m currently attempting to connect to a Windows machine via RDP using IPv6 through Guacamole, but it's failing. IPv4 works fine, but with IPv6, I receive the following error: Loading keymap "base" guacd_compose | guacd[2819]: INFO: Loading keymap "en-us-qwerty" guacd_compose | guacd[2819]: INFO: RDP server closed/refused connection: DNS lookup failed (incorrect hostname?)guacd_compose | guacd[2819]: INFO: User "@e9c97c11-47d1-4853-a914-2aeea9fccc3e" disconnected (0 users remain) guacd_compose | guacd[2819]: INFO: Last user of connection "$69cf5743-1437-41f1-a47c-09024d77c4e2" disconnected It appears guacd is unable to resolve or reach the IPv6 address. IPv4 connections use the hostname or IPv4 address and work correctly. Questions: 1. Do I need to configure anything specifically for IPv6 in guacd? 2. Should I adjust guacd.conf (e.g., bind_host) or update DNS/AAAA records? Any insight or configuration tips to get RDP working over IPv6 in Guacamole would be greatly appreciated. Thanks in advance! Note : RDP over IPv6 on the RDP server is enabled and confirmed through nmap -6 -sV -p 3389 [<IPv6_address>]
