Hi guys (and sorry for the noise), It appears return traffic from Charter to our ASN is blackholed. According to all three of our upstreams they are delivering traffic but it's not coming back. Unfortunately I don't have a reverse traceroute (our emails to charter customers are bouncing) so I have no idea what transit path they are returning traffic on. I tried fiddling with our outbound paths to no avail. If someone on a Charter connection could shoot me a traceroute to 209.9.238.7 that would be great. Ultimately if someone from Charter is willing to help that would be awesome as well. Source IP: 209.9.238.7 (AS29889) Dest IP: 75.140.10.216 Via HE: [root@mon ~]# traceroute 75.140.10.216 traceroute to 75.140.10.216 (75.140.10.216), 30 hops max, 60 byte packets 1 209.9.238.1 (209.9.238.1) 0.551 ms 0.790 ms 0.512 ms 2 gige-g4-13.core1.ash1.he.net (216.66.0.225) 12.029 ms 12.094 ms 12.158 ms 3 * * * 4 * * * 5 * * * 6 * * * 7 * * * 8 * * * 9 * * * 10 * * * 11 * * * 12 * * * 13 * * * 14 * * * 15 * * * 16 * * * 17 * * * 18 * * * 19 * * * 20 * * * 21 * * * 22 * * * 23 * * * 24 * * * 25 * * * 26 * * * 27 * * * 28 * * * 29 * * * 30 * * * Via Abovenet: [root@mon ~]# traceroute 75.140.10.216 traceroute to 75.140.10.216 (75.140.10.216), 30 hops max, 60 byte packets 1 209.9.238.1 (209.9.238.1) 0.544 ms 0.540 ms 0.573 ms 2 208.185.24.1 (208.185.24.1) 0.206 ms 0.218 ms 0.200 ms 3 xe-4-2-0.er1.iad10.us.above.net (64.125.29.198) 0.228 ms 0.232 ms 0.215 ms 4 above-telia.iad10.us.above.net (64.125.13.158) 117.943 ms 117.958 ms 117.763 ms 5 las-bb1-link.telia.net (80.91.246.71) 62.157 ms 62.162 ms 62.189 ms 6 cco-ic-151505-las-bb1.c.telia.net (213.248.79.102) 72.780 ms 70.183 ms 70.151 ms 7 * * * 8 * * * 9 * * * 10 * * * 11 * * * 12 * * * 13 * * * 14 * * * 15 * * * 16 * * * 17 * * * 18 * * * 19 * * * 20 * * * 21 * * * 22 * * * 23 * * * 24 * * * 25 * * * 26 * * * 27 * * * 28 * * * 29 * * * 30 * * * -- Randy McAnally