Found twitter.com was not loading tonight. Dug in.
$ host www.twitter.com
www.twitter.com is an alias for twitter.com.
twitter.com has address 104.244.42.129
twitter.com mail is handled by 30 ASPMX2.GOOGLEMAIL.com.
twitter.com mail is handled by 20 alt2.aspmx.l.google.com.
twitter.com mail is handled by 20 alt1.aspmx.l.google.com.
twitter.com mail is handled by 10 aspmx.l.google.com.
twitter.com mail is handled by 30 ASPMX3.GOOGLEMAIL.com.
$ dig ns twitter.com +short
b.r06.twtrdns.net.
a.r06.twtrdns.net.
c.r06.twtrdns.net.
d.r06.twtrdns.net.
a.u06.twtrdns.net.
b.u06.twtrdns.net.
c.u06.twtrdns.net.
d.u06.twtrdns.net.
$ dig @b.r06.twtrdns.net a twitter.com +short
104.244.42.129
And 104.244.42.129 does indeed point to Twitter (per WHOIS/ARIN), so doesn't
appear to be a DNS-related thing. Onward we go:
$ mtr www.twitter.com
Packets Pings
Host Loss% Snt Rcv Last Avg Best Wrst
1. 192.168.1.254 0.0% 9 9 0.6 0.6 0.5 0.8
2. 172-10-232-1.lightspeed.sntcca.sbcglobal.net (172.10.232.1) 0.0% 9 9 2.3 2.3 1.5 4.3
3. 71.148.149.42 (71.148.149.42) 0.0% 8 8 2.6 2.7 1.7 3.9
4. 12.242.117.22 (12.242.117.22) 0.0% 8 8 4.6 6.1 3.6 8.2
5. att-gw.sfo.pccw.net (192.205.32.82) 0.0% 8 8 6.7 6.5 5.3 8.1
6. Bundle-Ether45.br04.osa01.pccwbtn.net (63.223.26.30) 0.0% 8 8 121.6 121.1 119.6 122.8
7. 63-222-51-222.static.pccwglobal.net (63.222.51.222) 0.0% 8 8 154.3 154.4 153.3 155.8
8. (waiting for reply)
9. 104.244.42.129 (104.244.42.129) 0.0% 8 8 151.5 152.6 151.4 153.8
$ mtr -z www.twitter.com
Packets Pings
Host Loss% Snt Rcv Last Avg Best Wrst
1. AS??? 192.168.1.254 0.0% 8 8 0.8 0.6 0.3 0.8
2. AS7018 172-10-232-1.lightspeed.sntcca.sbcglobal.net (172.10.2 0.0% 8 8 1.3 2.2 1.0 4.1
3. AS7018 71.148.149.42 (71.148.149.42) 0.0% 8 8 2.2 3.4 1.9 5.0
4. AS7018 12.242.117.22 (12.242.117.22) 0.0% 8 8 6.0 6.1 4.5 7.6
5. AS7018 att-gw.sfo.pccw.net (192.205.32.82) 0.0% 8 8 5.6 6.2 4.8 7.7
6. AS3491 Bundle-Ether45.br04.osa01.pccwbtn.net (63.223.26.30) 0.0% 8 8 120.4 120.7 120.0 121.5
7. AS3491 63-222-51-222.static.pccwglobal.net (63.222.51.222) 0.0% 8 8 154.1 155.4 153.6 161.5
8. (waiting for reply)
9. AS13414 104.244.42.129 (104.244.42.129) 0.0% 7 7 152.7 152.2 150.8 154.0
AS3491 (pccwbtn.net) is PCCW Global, though a WHOIS on pccwbtn.net says
they're PCCW-HKT out of Hong Kong, which would explains the huge jump in
latency (6ms -> 121ms) since I'm located in California. 63.223.26.30 is
also PCCW Global.
PeeringDB says https://www.peeringdb.com/net/674 (AT&T) has a looking
glass server at http://route-server.ip.att.net/ but the webserver is not
listening on TCP port 80, nor 443:
$ telnet route-server.ip.att.net 80
Trying 12.0.1.28...
telnet: connect to address 12.0.1.28: Connection refused
telnet: Unable to connect to remote host
$ telnet route-server.ip.att.net 443
Trying 12.0.1.28...
telnet: connect to address 12.0.1.28: Connection refused
telnet: Unable to connect to remote host
And for those that want source and destinations:
src IP: 107.197.104.143 (AT&T Fibre)
dst IP: 104.244.42.129 (Twitter)
--
| Jeremy Chadwick jdc_at_koitsu.org |
| UNIX Systems Administrator PGP 0x2A389531 |
| Making life hard for others since 1977. |
_______________________________________________
Outages mailing list
Outages@outages.org
https://puck.nether.net/mailman/listinfo/outages
$ host www.twitter.com
www.twitter.com is an alias for twitter.com.
twitter.com has address 104.244.42.129
twitter.com mail is handled by 30 ASPMX2.GOOGLEMAIL.com.
twitter.com mail is handled by 20 alt2.aspmx.l.google.com.
twitter.com mail is handled by 20 alt1.aspmx.l.google.com.
twitter.com mail is handled by 10 aspmx.l.google.com.
twitter.com mail is handled by 30 ASPMX3.GOOGLEMAIL.com.
$ dig ns twitter.com +short
b.r06.twtrdns.net.
a.r06.twtrdns.net.
c.r06.twtrdns.net.
d.r06.twtrdns.net.
a.u06.twtrdns.net.
b.u06.twtrdns.net.
c.u06.twtrdns.net.
d.u06.twtrdns.net.
$ dig @b.r06.twtrdns.net a twitter.com +short
104.244.42.129
And 104.244.42.129 does indeed point to Twitter (per WHOIS/ARIN), so doesn't
appear to be a DNS-related thing. Onward we go:
$ mtr www.twitter.com
Packets Pings
Host Loss% Snt Rcv Last Avg Best Wrst
1. 192.168.1.254 0.0% 9 9 0.6 0.6 0.5 0.8
2. 172-10-232-1.lightspeed.sntcca.sbcglobal.net (172.10.232.1) 0.0% 9 9 2.3 2.3 1.5 4.3
3. 71.148.149.42 (71.148.149.42) 0.0% 8 8 2.6 2.7 1.7 3.9
4. 12.242.117.22 (12.242.117.22) 0.0% 8 8 4.6 6.1 3.6 8.2
5. att-gw.sfo.pccw.net (192.205.32.82) 0.0% 8 8 6.7 6.5 5.3 8.1
6. Bundle-Ether45.br04.osa01.pccwbtn.net (63.223.26.30) 0.0% 8 8 121.6 121.1 119.6 122.8
7. 63-222-51-222.static.pccwglobal.net (63.222.51.222) 0.0% 8 8 154.3 154.4 153.3 155.8
8. (waiting for reply)
9. 104.244.42.129 (104.244.42.129) 0.0% 8 8 151.5 152.6 151.4 153.8
$ mtr -z www.twitter.com
Packets Pings
Host Loss% Snt Rcv Last Avg Best Wrst
1. AS??? 192.168.1.254 0.0% 8 8 0.8 0.6 0.3 0.8
2. AS7018 172-10-232-1.lightspeed.sntcca.sbcglobal.net (172.10.2 0.0% 8 8 1.3 2.2 1.0 4.1
3. AS7018 71.148.149.42 (71.148.149.42) 0.0% 8 8 2.2 3.4 1.9 5.0
4. AS7018 12.242.117.22 (12.242.117.22) 0.0% 8 8 6.0 6.1 4.5 7.6
5. AS7018 att-gw.sfo.pccw.net (192.205.32.82) 0.0% 8 8 5.6 6.2 4.8 7.7
6. AS3491 Bundle-Ether45.br04.osa01.pccwbtn.net (63.223.26.30) 0.0% 8 8 120.4 120.7 120.0 121.5
7. AS3491 63-222-51-222.static.pccwglobal.net (63.222.51.222) 0.0% 8 8 154.1 155.4 153.6 161.5
8. (waiting for reply)
9. AS13414 104.244.42.129 (104.244.42.129) 0.0% 7 7 152.7 152.2 150.8 154.0
AS3491 (pccwbtn.net) is PCCW Global, though a WHOIS on pccwbtn.net says
they're PCCW-HKT out of Hong Kong, which would explains the huge jump in
latency (6ms -> 121ms) since I'm located in California. 63.223.26.30 is
also PCCW Global.
PeeringDB says https://www.peeringdb.com/net/674 (AT&T) has a looking
glass server at http://route-server.ip.att.net/ but the webserver is not
listening on TCP port 80, nor 443:
$ telnet route-server.ip.att.net 80
Trying 12.0.1.28...
telnet: connect to address 12.0.1.28: Connection refused
telnet: Unable to connect to remote host
$ telnet route-server.ip.att.net 443
Trying 12.0.1.28...
telnet: connect to address 12.0.1.28: Connection refused
telnet: Unable to connect to remote host
And for those that want source and destinations:
src IP: 107.197.104.143 (AT&T Fibre)
dst IP: 104.244.42.129 (Twitter)
--
| Jeremy Chadwick jdc_at_koitsu.org |
| UNIX Systems Administrator PGP 0x2A389531 |
| Making life hard for others since 1977. |
_______________________________________________
Outages mailing list
Outages@outages.org
https://puck.nether.net/mailman/listinfo/outages