DownDetector isn't showing anything significant, but we're seeing HTTPv6 access to http://www.facebook.com intermittently failing since 4:14 pm Frank root@nagios:/tmp# tcptraceroute6 www.facebook.com traceroute to star-mini.c10r.facebook.com (2a03:2880:f13a:83:face:b00c:0:25de) from 2607:fe28:0:1000::5, port 80, from port 34889, 30 hops max, 60 bytes packets 1 router-core.mtcnet.net (2607:fe28:0:1000::1) 0.641 ms 0.220 ms 0.207 ms 2 2001:5f8:7f06:c::1 (2001:5f8:7f06:c::1) 0.175 ms 0.104 ms 0.167 ms 3 2001:5f8:7f06:e::2 (2001:5f8:7f06:e::2) 0.153 ms 0.150 ms 0.150 ms 4 2001:504:27::80a6:0:2 (2001:504:27::80a6:0:2) 16.859 ms 17.070 ms 7.540 ms 5 po102.psw02.msp1.tfbnw.net (2620:0:1cff:dead:bef0::395) 7.129 ms 7.082 ms 7.095 ms 6 po2.msw1af.01.msp1.tfbnw.net (2a03:2880:f03a:ffff::3f) 7.033 ms 7.041 ms 7.057 ms 7 edge-star-mini6-shv-01-msp1.facebook.com (2a03:2880:f13a:83:face:b00c:0:25de) 6.940 ms [open] 6.958 ms 6.920 ms root@nagios:/tmp#