In the glibc world, you can specify a rather fine degree of preferences here for which resolution you prefer for which network space, via /etc/gai.conf. It's n

In the glibc world, you can specify a rather fine degree of preferences here for which resolution you prefer for which network space, via /etc/gai.conf. It's not a very nice tool, but I've been able to use it to set good preferences for a dual-stack environment.