[outages] Mediacom DNS server issue?

[Frank Bulk]

More details:

>From an outside host:
$ dig MX mchsi.com @74.84.103.134

; <<>> DiG 9.9.2-vjs287.12 <<>> MX mchsi.com @74.84.103.134
;; global options: +cmd
;; connection timed out; no servers could be reached
$

>From my main host:
# tcptraceroute 74.84.103.134 53
Selected device eth0.3, address 96.31.0.5, port 52176 for outgoing packets
Tracing the path to 74.84.103.134 on TCP port 53 (domain), 30 hops max
 1  router-core-inside.mtcnet.net (96.31.0.254)  0.234 ms  0.180 ms  0.192
ms
 2  sxct.sxcy.mtcnet.net (167.142.156.197)  0.210 ms  0.124 ms  0.119 ms
 3  premier.sxcy-mlx.fbnt.netins.net (173.215.60.5)  1.639 ms  1.639 ms
1.605 ms
 4  ins-db1-te-13-2-219.desm.netins.net (167.142.60.157)  7.835 ms  7.791 ms
7.789 ms
 5  ins-dc1-et-8-2.desm.netins.net (167.142.67.5)  7.958 ms  7.812 ms  7.839
ms
 6  te-3-3.car2.KansasCity1.Level3.net (4.53.34.113)  109.795 ms  114.215 ms
13.990 ms
 7  ae-11-11.car1.KansasCity1.Level3.net (4.69.135.233)  51.092 ms  23.691
ms  35.036 ms
 8  ae-5-5.ebr2.Dallas1.Level3.net (4.69.135.230)  23.147 ms  23.163 ms
23.091 ms
 9  ae-82-82.csw3.Dallas1.Level3.net (4.69.151.153)  23.102 ms  23.145 ms
23.195 ms
10  ae-3-80.edge10.Dallas1.Level3.net (4.69.145.146)  23.158 ms  23.130 ms
23.110 ms
11  ATT (4.68.62.230)  26.091 ms  27.334 ms  27.873 ms
12  cr1.dlstx.ip.att.net (12.123.16.86)  38.178 ms  38.530 ms  35.526 ms
13  cr2.kc9mo.ip.att.net (12.122.28.86)  34.162 ms  38.143 ms  34.972 ms
14  12.122.150.205  79.134 ms  65.759 ms  49.982 ms
15  * * *
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Destination not reached
#

-----Original Message-----
From: Frank Bulk [mailto:frnkblk at iname.com] 
Sent: Thursday, January 31, 2013 5:39 PM
To: outages at outages.org
Subject: Mediacom DNS server issue?

I was first alerted by our email server because there was no DNS resolution
for mchsi.com.

Every indication from my testing is that Mediacom's two DNS servers:
	NS1.MCOMDC.COM 74.84.103.134 
	NS2.MCOMDC.COM 74.84.119.134
are down.

I can't query anything about mchsi.com or mediacomcable.com, but
www.mediacomcc.com, which uses different nameservers, resolved just fine.

Frank