On Thu, Feb 13, 2014 at 11:16 AM, Andrew Sullivan <asullivan@dyn.com> wrote:
I think that may be a problem at your end, since resolution works just fine for me here on at least some of their authoritative name servers.
The fact that the original poster in the thread stated that Webex had confirmed that their service was "down for everyone" probably means that it was a little more than just my DNS that was broken. The reason it's working for you know is that the problem appears to have been resolved >10 minutes before your response. FWIW (all commands run during the outage) : $ dig +trace www.webex.com ; <<>> DiG 9.8.4-rpz2+rl005.12-P1 <<>> +trace www.webex.com ;; global options: +cmd . 5620 IN NS g.root-servers.net. . 5620 IN NS h.root-servers.net. . 5620 IN NS i.root-servers.net. . 5620 IN NS j.root-servers.net. . 5620 IN NS k.root-servers.net. . 5620 IN NS l.root-servers.net. . 5620 IN NS m.root-servers.net. . 5620 IN NS a.root-servers.net. . 5620 IN NS b.root-servers.net. . 5620 IN NS c.root-servers.net. . 5620 IN NS d.root-servers.net. . 5620 IN NS e.root-servers.net. . 5620 IN NS f.root-servers.net. ;; Received 512 bytes from 208.94.242.3#53(208.94.242.3) in 21 ms com. 172800 IN NS h.gtld-servers.net. com. 172800 IN NS a.gtld-servers.net. com. 172800 IN NS l.gtld-servers.net. com. 172800 IN NS i.gtld-servers.net. com. 172800 IN NS k.gtld-servers.net. com. 172800 IN NS b.gtld-servers.net. com. 172800 IN NS f.gtld-servers.net. com. 172800 IN NS g.gtld-servers.net. com. 172800 IN NS d.gtld-servers.net. com. 172800 IN NS c.gtld-servers.net. com. 172800 IN NS m.gtld-servers.net. com. 172800 IN NS e.gtld-servers.net. com. 172800 IN NS j.gtld-servers.net. ;; Received 503 bytes from 2001:7fe::53#53(2001:7fe::53) in 49 ms webex.com. 172800 IN NS ns01.webex.com. webex.com. 172800 IN NS ns03.webex.com. webex.com. 172800 IN NS ns05.webex.com. webex.com. 172800 IN NS ns06.webex.com. webex.com. 172800 IN NS ns07.webex.com. webex.com. 172800 IN NS ns08.webex.com. ;; Received 241 bytes from 192.55.83.30#53(192.55.83.30) in 353 ms webex.com. 120 IN SOA ns01.webex.com. csg-dnsadmin.cisco.com. 2013098439 300 3600 604800 120 ;; Received 91 bytes from 114.29.195.73#53(114.29.195.73) in 263 ms $ dig +trace a www.webex.com ; <<>> DiG 9.8.4-rpz2+rl005.12-P1 <<>> +trace a www.webex.com ;; global options: +cmd . 5615 IN NS f.root-servers.net. . 5615 IN NS g.root-servers.net. . 5615 IN NS h.root-servers.net. . 5615 IN NS i.root-servers.net. . 5615 IN NS j.root-servers.net. . 5615 IN NS k.root-servers.net. . 5615 IN NS l.root-servers.net. . 5615 IN NS m.root-servers.net. . 5615 IN NS a.root-servers.net. . 5615 IN NS b.root-servers.net. . 5615 IN NS c.root-servers.net. . 5615 IN NS d.root-servers.net. . 5615 IN NS e.root-servers.net. ;; Received 512 bytes from 208.94.242.3#53(208.94.242.3) in 20 ms com. 172800 IN NS b.gtld-servers.net. com. 172800 IN NS k.gtld-servers.net. com. 172800 IN NS g.gtld-servers.net. com. 172800 IN NS f.gtld-servers.net. com. 172800 IN NS a.gtld-servers.net. com. 172800 IN NS h.gtld-servers.net. com. 172800 IN NS m.gtld-servers.net. com. 172800 IN NS c.gtld-servers.net. com. 172800 IN NS l.gtld-servers.net. com. 172800 IN NS j.gtld-servers.net. com. 172800 IN NS e.gtld-servers.net. com. 172800 IN NS i.gtld-servers.net. com. 172800 IN NS d.gtld-servers.net. ;; Received 503 bytes from 2001:7fe::53#53(2001:7fe::53) in 50 ms webex.com. 172800 IN NS ns01.webex.com. webex.com. 172800 IN NS ns03.webex.com. webex.com. 172800 IN NS ns05.webex.com. webex.com. 172800 IN NS ns06.webex.com. webex.com. 172800 IN NS ns07.webex.com. webex.com. 172800 IN NS ns08.webex.com. dig: couldn't get address for 'ns01.webex.com': no more Scott