Severe problems in reaching OARCorp

[Ralf Corsepius]

On Thu, 2004-11-25 at 12:10 -0500, Bogdan Vacaliuc wrote:
> On Thursday, November 25, 2004 11:50 AM, Ralf Corsepius wrote:
> > More bizarre: Even trying to access the IP-addresses (216.107.91.229
> > rsp. 216.107.91.227) doesn't work. 
> 
> It was intermittent, recently for me.  Some packet loss, but not always complete loss; its down now.  Possibly a temporary ISP
> routing issue?
> 
> The namerserver is behaving stragely, however for rtems.org but not for oarcorp.com:
> 
> [~] !123
> nslookup www.oarcorp.com NS1.NETWORKTEL.NET
> Server:  ns1.networktel.net
> Address:  216.83.236.227
> 
> Name:    www.oarcorp.com
> Address:  216.107.91.227
Here, you were able to access ns1.networktel.net.

> [~] !125
> nslookup rtems.com NS1.NETWORKTEL.NET
> Server:  ns1.networktel.net
> Address:  216.83.236.227
> 
> Name:    rtems.com
> 
> [~]
> 
> Where's the address for rtems.com?

>From what I see, {ns1|ns2}.networktel.net currently aren't accessible
from here at all.

> nslookup www.oarcorp.com NS1.NETWORKTEL.NET
;; connection timed out; no servers could be reached

> nslookup www.rtems.com NS1.NETWORKTEL.NET
;; connection timed out; no servers could be reached

> nslookup www.rtems.com NS2.NETWORKTEL.NET
;; connection timed out; no servers could be reached

> nslookup www.oarcorp.com NS2.NETWORKTEL.NET
;; connection timed out; no servers could be reached

> Traceroute says:
> 
> Tracing route to www.oarcorp.com [216.107.91.227]
> over a maximum of 30 hops:
> 
>   1   <10 ms   <10 ms   <10 ms  192.168.3.254
>   2    16 ms   <10 ms    16 ms  gw-dslv-1.mv.net [207.22.18.1]
>   3    15 ms    32 ms    15 ms  ag-mvcommun-serial10-1-0.bosma01.paetec.net [64.
> 80.7.197]
>   4   <10 ms    16 ms    15 ms  bb-vlan3-eth0-0-1.bosma01.paetec.net [66.155.217
> .34]
>   5    16 ms    16 ms    15 ms  64.80.254.246
>   6    15 ms    16 ms    16 ms  ge-0-0-0.ar1.NYC1.gblx.net [64.210.21.93]
>   7    62 ms    47 ms    47 ms  so3-0-0-2488M.ar3.DAL1.gblx.net [67.17.70.201]
>   8    47 ms    63 ms    62 ms  ITC-Deltacom.so-0-0-0.ar3.DAL1.gblx.net [64.208.
> 169.142]
>   9    47 ms    62 ms    47 ms  gig2-0.dllstxal0rw.xr.deltacom.net [66.35.174.21
> 4]
>  10    62 ms    63 ms    78 ms  66.35.174.81
>  11    62 ms    63 ms    62 ms  gig2-0.brhmalwd6aw.xr.deltacom.net [66.35.174.20
> 6]
>  12    63 ms    62 ms    78 ms  66.35.174.14
>  13    62 ms    63 ms    62 ms  66.35.170.134
>  14    63 ms    62 ms    63 ms  216.248.128.254
>  15    78 ms    62 ms    63 ms  216-83-239-17.wan.networktel.net [216.83.239.17]
> 
>  16    78 ms    63 ms    78 ms  216-83-239-58.wan.networktel.net [216.83.239.58]
> 
>  17    62 ms    78 ms    79 ms  216-107-82-70.wan.networktel.net [216.107.82.70]
> 
>  18     *        *        *     Request timed out.
..

Meanwhile the situation seems to have worsened:

# traceroute www.oarcorp.com
traceroute to www.oarcorp.com (216.107.91.227), 30 hops max, 38 byte packets
...
 6  lndnuk1icx1.wcg.net (195.66.224.105)  160.881 ms  164.084 ms  163.522 ms
 7  nycmny2wcx2-pos15-3.wcg.net (64.200.87.61)  163.818 ms  161.338 ms  163.774 ms
 8  hrndva1wcx2-pos1-0-oc192.wcg.net (64.200.210.178)  162.603 ms  161.342 ms  163.765 ms
 9  hrndva1wcx3-pos4-0-oc192.wcg.net (64.200.89.122)  163.841 ms  162.541 ms  164.773 ms
10  drvlga1wcx2-pos3-0-oc192.wcg.net (64.200.210.237)  173.933 ms  172.956 ms  171.423 ms
11  atlnga6lce1-pos5-0.wcg.net (64.200.127.62)  172.923 ms  172.654 ms  172.155 ms
12  atlnga6lce1-bti-pos.wcg.net (64.200.126.98)  170.483 ms  172.211 ms  172.902 ms
13  66.35.170.134 (66.35.170.134)  176.126 ms  176.702 ms  176.845 ms
14  * * *
15  * * *

Within the last hour, all traceroutes ended with a 66.35.170.x address
(According to whois, owned by ITC-DeltaCom).

So, as it seems to me, the cause probably is the networktel.net
nameservers being unreachable or at least flaky for several days,
may-be due to routing problems between Networktel and ITC-DeltaCom.

I guess, this might have caused some DNS-servers to drop oarcorp.com and
rtems.com, while others still have these in there caches.

Ralf