routing issue for verizon dsl customers in western massachusetts

Seth Mos seth.mos at
Thu Sep 15 20:28:27 UTC 2011

Congratulations on your nat444 connection. I suspect a autoblocklist of sorts. They somehow always end up blocking the hosts you are using.

I vaguely remember my watchguard firebox 1000 doing so. It was red too.

Regards and good luck,


typed on a tiny touchscreen, why exactly?

Steve Bohrer <skbohrer at>schreef:

>On Sep 15, 2011, at 3:39 PM, Christopher Morrow wrote:
>> On Thu, Sep 15, 2011 at 3:34 PM, Brian Gold <bgold at>  
>> wrote:
>>> Over the past week, we've discovered that there is an issue with  
>>> the way
>>> some Verizon DSL customers are being routed in Western  
>>> Massachusetts that is
>>> preventing them from reaching my employers public IPs. The problem  
>>> is only
>>> limited to Verizon DSL customers, everyone else can reach these IP  
>>> addresses
>>> just fine. After many hours on the phone with Verizon tech support, I
>>> finally managed to get myself and one of my coworker's home dsl  
>>> connections
>>> switched from a "redback router" to a "juniper router" which  
>>> resolved the
>>> issue, but only for us.
>> If you buy verizon services at your day job you can probably make
>> noise through your sales droids better than here (sadly)... verizon
>> likes to jump when customers have problems, if the customer is a large
>> corporation or other 'important' customer.
>That is just the problem! The college does not buy any Verizon network  
>stuff directly, so we don't really have any access to their support.  
>(We have a few cell phones, but not enough to be "important".)
>Brian Gold (who first posted) happens to have their DSL to his house,  
>and he was one of five who have reported the problem, so that gave him  
>a slight in. But the only techs he could reach as an "end user" were  
>not high enough up to fix this problem in a general way. After  
>pressing them for literally hours, he was able to get transfered to  
>their NOC, and get the problem resolved for his one address. But, they  
>would not give him the NOC contact, and he had to repeat this multi- 
>hour process to get it fixed for an other user. Verizon's DSL support  
>suggested that we get our bandwith provider involved, and so they  
>tried to pitch in, but they don't have any Verizon NOC contact either,  
>especially since this issue is purely within a small corner of  
>Verizon's DSL network, not on any of Verizon's links to our provider.
>This issue hits only a few Verizon DSL users in NW Mass. It does not  
>really seem like a routing problem, because the affected users can  
>reach many of the servers in our AS, but not some addresses.  
>Unfortunately, the "blocked" addresses include our web server and our  
>mail server, so our staff who live out there noticed the issue pretty  
>quickly. Traceroutes from Brian's house show that for our blocked  
>hosts, the users don't get beyond Verizon's NAT.
>The Verizon tech's "fix" of re-patching Brian's DSL line in to a  
>different router feels to me like there is a config problem in the  
>other router, but the tech we got is not authorized to alter the  
>config. It would be nice if we could reach someone who could actually  
>edit the broken config and make it right. Anyone from Verzion's NOC  
>for Western Mass reading this? Or, does anyone else have useful  
>contact info for them?
>FWIW, Simon's Rock is, AS 19345. Here are a failed and  
>a good trace from Brian's house, to different servers on our campus :
>Tracing route to []
>over a maximum of 30 hops:
>  1    <1 ms    <1 ms    <1 ms
>  2     1 ms     1 ms     1 ms
>  3    53 ms   104 ms   116 ms
>  4     *        *        *     Request timed out.
>  5     *        *        *     Request timed out.
>  6     *        *        *     Request timed out.
>  7     *        *        *     Request timed out.
>Tracing route to []
>over a maximum of 30 hops:
>1    <1 ms    <1 ms    <1 ms
>2     1 ms     1 ms     1 ms
>3    87 ms    54 ms    54 ms
>4    99 ms   109 ms   103 ms at-0-3-0-1711.WMA-CORE-RTR2.verizon- 
> []
>5    16 ms    18 ms    16 ms  so-7-3-1-0.NY5030-BB-RTR2.verizon- 
> []
>6    19 ms    17 ms    17 ms  0.xe-3-1-0.BR3.NYC4.ALTER.NET  
>7    18 ms    21 ms    18 ms
>8   108 ms   188 ms   116 ms  
>9    24 ms    28 ms    23 ms  
>10   121 ms   160 ms   127 ms
>11    77 ms    77 ms    78 ms
>Trace complete.
>Anyways, thanks for any suggestions you can offer.
>Steve Bohrer
>Network Administrator
>ITS, Bard College at Simon's Rock

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