Hi, I tried to authenticate a site with DBD and the remote MySQL database is not reachable via IPv6 (the IPv4 connection working without any problem). The Apache (httpd-2.2.15-59.el6.x86_64) is running on a RH6 system, and from the APR, APR-Util and APR-Util-MySQL has been installed the latest version. [root@TesztRH6 apr-1.6.2]# rpm -qa | grep -i apr | sort apr-1.6.2-1.x86_64 apr-devel-1.6.2-1.x86_64 apr-util-1.6.0-1.x86_64 apr-util-ldap-1.6.0-1.x86_64 apr-util-mysql-1.6.0-1.x86_64 The IPv6 theoretically enabled, because when I created the rpm from the tar.bz2, I seen this in the compiling log: Checking for IPv6 Networking support... checking for library containing getaddrinfo... none required checking for library containing gai_strerror... none required checking for library containing getnameinfo... none required checking for gai_strerror... yes checking for working getaddrinfo... yes checking for negative error codes for getaddrinfo... yes checking for working getnameinfo... yes checking for sockaddr_in6... yes checking for sockaddr_storage... yes checking for sockaddr_un... yes checking for working AI_ADDRCONFIG... yes checking if APR supports IPv6... yes The params in /etc/httpd/conf.d/dbd_mysql.conf file: DBDParams host=2002:5cf9:e053:...,port=3306,dbname=database,user=root,pass=password I tried to connect the host with [ ], but nothing changed. The /var/log/httpd/error_log file: [Mon Oct 02 11:55:06 2017] [notice] Apache/2.2.15 (Unix) DAV/2 PHP/5.3.3 configured -- resuming normal operations [Mon Oct 02 11:55:06 2017] [error] (20014)Internal error: DBD: Can't connect to mysql [Mon Oct 02 11:55:06 2017] [error] (20014)Internal error: DBD: failed to initialise [Mon Oct 02 11:55:06 2017] [crit] (20014)Internal error: DBD: child init failed! When I tried to connect to the MySQL DB server with mysql command and with IPv6 and connection working properly. [root@TesztRH6 apr-1.6.2]# mysql -V mysql Ver 14.14 Distrib 5.7.19, for Linux (x86_64) using EditLine wrapper [root@TesztRH6 apr-1.6.2]# mysql --host=2002:5cf9:e053:... -u root -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 116 Server version: 5.5.5-10.1.26-MariaDB MariaDB Server Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> The situation is the same with Apache 2.4 (httpd24-httpd-2.4.6-5.el6) too. Do you have any idea why not working the IPv6 connection? Regards, Ottó
That's not a valid hostname, did you try square brackets?
(In reply to William A. Rowe Jr. from comment #1) > That's not a valid hostname, did you try square brackets? Yes, I tried with square bracket too, but the message is the same. [Wed Oct 04 22:11:37 2017] [error] (20014)Internal error (specific information not available): DBD: Can't connect to mysql [Wed Oct 04 22:11:37 2017] [error] (20014)Internal error (specific information not available): DBD: failed to initialise