On Sunday, June 28, 2015 04:35:39 PM Thomas Eckardt wrote: > The reason can be found in > http://man7.org/linux/man-pages/man7/ipv6.7.html > > IO::Socket::IP forces 1 for IPV6_V6ONLY, if any of AF_INET6 or PF_INET6 is > defined for the socket domain/family and IPV6_V6ONLY can be set (override > the OS system default). > IO::Socket::INET6 does not touch the IPV6_V6ONLY flag , which forces the > usage of the OS level setting.
I think Perl decided to go with the former function in IO::Socket::IP for a reason. I am not sure IO::Socket::INET6 is used much these days as its supported in Perl. Not sure why IO::Socket::INET6 does things one way and IO::Socket::IP another, but one is officially in perl and the other is 3rd party. > The overall recommendation is to use the system default - so > IO::Socket::INET6 does nothing wrong. True but still seems odd to use a module for something that is supported in Perl itself. That module was more for when perl's default did not support IPv6. > Binding to the universal IPv6 [::] with disabled IPV6_V6ONLY, enables > IPv6 and IPv4 connection at this listener - binding IPv4 explicit to > 0.0.0.0 to the same port after this, will fail. Seems that was the issue, trying to bind to IPv4 and IPv6 wildcards. Doing just IPv6 works for both. > The next release of assp V2 will take care of the system setting of > IPV6_V6ONLY for security reasons. If this system flag is set to 1, nothing > is changed. If this system flag is set to zero, assp will try to switch it > to 1 for each defined universal IPv6 listener. How ever, a system can be > build in a way, that does not allow to change this flag any way - so the > system default will take place. Seems with your change, you now have to set both. However for the SMTP Secure Listening Port, still seems to be the old way. I have SMTP Listen Port -> 0.0.0.0:25|0.0.0.0:2525|[::]:25|[::]:2525 Disable AUTH support on listenPorts -> 0.0.0.0:2525|[::]:2525 Then I have this for the other SMTP Secure Listen Port -> [::]:465|[::]:587 Kinda like the old way better, just specifying [::] vs 0.0.0.0|[::]. But I assume you will want to address the SMTP Secure Listen Port to be consistent with the others. -- William L. Thomson Jr. Obsidian-Studios, Inc. http://www.obsidian-studios.com ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Assp-user mailing list Assp-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/assp-user
