On 2012-12-18 07:24, Jared Mauch wrote: > Seems to work for me.. perhaps a local ipv6 issue for you? The issue occurs at multiple sites connected to different ISPs. Some sites get IPv6 via 6in4, some are native dual-stack. I have one host where I can reach port 80 over IPv6, but not port 443. I'm fairly sure this is a path MTU issue on EFTPS' end.