pv2b commented on code in PR #268: URL: https://github.com/apache/guacamole-manual/pull/268#discussion_r1971384717
########## src/guacamole-docker.md: ########## @@ -176,6 +176,31 @@ detail in the sections below. If the required configuration options for at least one authentication mechanism are not provided, the Guacamole image will not be able to start up, and you will see an error. +(guacamole-docker-ipv6)= + +### Configure Guacamole to prefer IPv6 for outbound connections + +By default, Guacamole will use IPv4 for all outbound connections, where an +A record is present in DNS. IPv6 will be used only if there are only AAAA +records in DNS, or if an IPv6 address is hard-coded. + +Additionally, Guacamole will only attempt to make one connection to a single +IP address, so if the IPv4 connection fails, it will not fall back to IPv6. +This can be problematic for IPv6-only deployments, where such connections may +fail with a "Network is unreachable" error. + +To override this, set the `JAVA_OPTS` environment variable to +`-Djava.net.preferIPv6Addresses=true`. Review Comment: I've re-worded this documentation section, hopefully this addresses your concerns -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: dev-unsubscr...@guacamole.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
