Comcast Contact

2007-10-27 Thread Gary Stanley


Can someone clueful from comcast.net contact me offlist please?

Thank you.
-G







RE: Seeking Comcast Contact: need to troubleshoot packet loss and/or asymmetric routing issue between Comcast Onvoy

2007-08-02 Thread Durand, Alain

I've forwarded your message to the appropriate team within Comcast.

  - Alain. 

 -Original Message-
 From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On 
 Behalf Of Craig D. Rice
 Sent: Thursday, August 02, 2007 9:30 AM
 To: nanog@merit.edu
 Subject: Seeking Comcast Contact: need to troubleshoot packet 
 loss and/or asymmetric routing issue between Comcast  Onvoy
 
 
 
 For four months dozens of our users who are Comcast 
 subscribers have had difficulty reaching St. Olaf College's 
 and Carleton College's network services.
 
 We have worked through everything we can think of with our 
 Onvoy (regional
 ISP) network engineers. We have isolated the problem a couple 
 of Comcast's IP subnets, but need a contact within Comcast to 
 further troubleshoot.
 
 The behavior in a nutshell:
 
 --
 
 User A on Comcast Subnet B browses to www.stolaf.edu (http or 
 https, other web sites on-site and @carleton.edu behave the 
 same). Our access_log shows an initial GET / of our 
 homepage, then very slow (if any) subsequent requests (for 
 our stylesheet or homepage images). Ping's look fine; 
 traceroute's look as reasonable. Telnet's to port 80 and 
 other services do seem to respond, albeit very slowly.
 
 User A has the same problem with access @carleton.edu but can 
 access everything else (including other Onvoy customers) 
 without any trouble whatsoever.
 
 If User A then removes his Linksys router and connects his 
 computer directly to the cable modem, he acquires an IP 
 address in Comcast Subnet C. Then, everything works fine, 
 including access to www.stolaf.edu and www.carleton.edu. He 
 puts the Linksys router back in (which still has the IP 
 address in Comcast Subnet B), and the problem returns.
 
 The problem IP subnets are completely consistent.
 
  Known WORKING IP Subnets: 75.72.0.0, 24.x Known 
 NON-WORKING IP Subnets: 71.x, 73.x
 
 --
 
 We have already attempted the usual troubleshooting and have 
 eliminated user problems, computer problems, server problems, 
 cable modem problems, and Linksys router problems. 
 Traceroutes have been somewhat inconclusive since Onvoy 
 blocks ICMP within its network.
 
 So, why just St. Olaf and Carleton services? We are on a 
 shared physical link from Onvoy, though on different VLANs. 
 Onvoy has verified everything they can (routing, packet loss, 
 etc.) between them and us, and I'm not sure what additional 
 questions I can ask of them to test. Suggestions?
 
 Maybe Comcast has a broken transparent proxy on part(s) of 
 their network? 
 But they have told us they have nothing like this anywhere on 
 their network.
 
 Maybe there is some asymmetric routing somewhere, though all 
 the investigation there has come up empty.
 
 A third possibility is some kind of packet loss, but there is 
 little if any evidence of that.
 
 So, we are really at a loss and seek any suggestions you all 
 might have. And a contact in Comcast network engineering 
 would be especially useful to continue our troubleshooting.
 
 With thanks,
 Craig
 -- 
 Craig D. Rice  Associate Director of 
 Information Systems
 [EMAIL PROTECTED]Information and Instructional 
 Technologies
 +1 507 786-3631 St. 
 Olaf College
 +1 507 786-3096 FAX 1510 St. 
 Olaf Avenue
 http://www.stolaf.edu/people/cdr Northfield, MN  
 55057-1097  USA
 


Seeking Comcast Contact: need to troubleshoot packet loss and/or asymmetric routing issue between Comcast Onvoy

2007-08-02 Thread Craig D. Rice



For four months dozens of our users who are Comcast subscribers have had 
difficulty reaching St. Olaf College's and Carleton College's network services.


We have worked through everything we can think of with our Onvoy (regional 
ISP) network engineers. We have isolated the problem a couple of Comcast's 
IP subnets, but need a contact within Comcast to further troubleshoot.


The behavior in a nutshell:

--

User A on Comcast Subnet B browses to www.stolaf.edu (http or https, other 
web sites on-site and @carleton.edu behave the same). Our access_log shows 
an initial GET / of our homepage, then very slow (if any) subsequent 
requests (for our stylesheet or homepage images). Ping's look fine; 
traceroute's look as reasonable. Telnet's to port 80 and other services do 
seem to respond, albeit very slowly.


User A has the same problem with access @carleton.edu but can access 
everything else (including other Onvoy customers) without any trouble 
whatsoever.


If User A then removes his Linksys router and connects his computer directly 
to the cable modem, he acquires an IP address in Comcast Subnet C. Then, 
everything works fine, including access to www.stolaf.edu and 
www.carleton.edu. He puts the Linksys router back in (which still has the IP 
address in Comcast Subnet B), and the problem returns.


The problem IP subnets are completely consistent.

Known WORKING IP Subnets: 75.72.0.0, 24.x
Known NON-WORKING IP Subnets: 71.x, 73.x

--

We have already attempted the usual troubleshooting and have eliminated user 
problems, computer problems, server problems, cable modem problems, and 
Linksys router problems. Traceroutes have been somewhat inconclusive since 
Onvoy blocks ICMP within its network.


So, why just St. Olaf and Carleton services? We are on a shared physical 
link from Onvoy, though on different VLANs. Onvoy has verified everything 
they can (routing, packet loss, etc.) between them and us, and I'm not sure 
what additional questions I can ask of them to test. Suggestions?


Maybe Comcast has a broken transparent proxy on part(s) of their network? 
But they have told us they have nothing like this anywhere on their network.


Maybe there is some asymmetric routing somewhere, though all the 
investigation there has come up empty.


A third possibility is some kind of packet loss, but there is little if any 
evidence of that.


So, we are really at a loss and seek any suggestions you all might have. And 
a contact in Comcast network engineering would be especially useful to 
continue our troubleshooting.


With thanks,
Craig
--
Craig D. Rice  Associate Director of Information Systems
[EMAIL PROTECTED]Information and Instructional Technologies
+1 507 786-3631 St. Olaf College
+1 507 786-3096 FAX 1510 St. Olaf Avenue
http://www.stolaf.edu/people/cdr Northfield, MN  55057-1097  USA


Re: Seeking Comcast Contact: need to troubleshoot packet loss and/or asymmetric routing issue between Comcast Onvoy

2007-08-02 Thread William Herrin

On 8/2/07, Craig D. Rice [EMAIL PROTECTED] wrote:
 We have already attempted the usual troubleshooting and have eliminated user
 problems, computer problems, server problems, cable modem problems, and
 Linksys router problems. Traceroutes have been somewhat inconclusive since
 Onvoy blocks ICMP within its network.

Craig,

This rings a bell. Do they block the mandatory ICMP
fragmentation-needed messages?

Try this: on your web server, reduce the MTU from 1500 bytes to 1400
bytes and see if the affected comcast users can now access your web
server.

Regards,
Bill Herrin



-- 
William D. Herrin  [EMAIL PROTECTED]  [EMAIL PROTECTED]
3005 Crane Dr.Web: http://bill.herrin.us/
Falls Church, VA 22042-3004


Re: Seeking Comcast Contact: need to troubleshoot packet loss and/or asymmetric routing issue between Comcast Onvoy

2007-08-02 Thread Robert Boyle


At 09:30 AM 8/2/2007, Craig D. Rice wrote:
For four months dozens of our users who are Comcast subscribers have 
had difficulty reaching St. Olaf College's and Carleton College's 
network services.


We have worked through everything we can think of with our Onvoy 
(regional ISP) network engineers. We have isolated the problem a 
couple of Comcast's IP subnets, but need a contact within Comcast to 
further troubleshoot.


(snip)

Either your firewall/router or the customer's firewall/router is 
blocking PMTUD packets. Fragment needed, but don't fragment bit set. 
Look at your ICMP access list and make sure you are allowing: permit 
icmp any any unreachable from any Internet address. I suspect an 
overzealous firewall admin is blocking all icmp. Read the acronym to 
him/her and explain that some icmp is necesary for the Internet to work.


-Robert



Tellurian Networks - Global Hosting Solutions Since 1995
http://www.tellurian.com | 888-TELLURIAN | 973-300-9211
Well done is better than well said. - Benjamin Franklin



Re: Seeking Comcast Contact: need to troubleshoot packet loss and/or asymmetric routing issue between Comcast Onvoy

2007-08-02 Thread Jim Shankland


Robert Boyle wrote:
Either your firewall/router or the customer's firewall/router is 
blocking PMTUD packets.  I suspect an overzealous firewall admin

 is blocking all icmp.

Which you can't do anything about if the overzealous firewall admin
is at the other end of the connection.  My repeated, first-hand
experience has been that several of the better-known web sites out
there will happily send out 1500-byte packets with DF set, then
ignore the DEST_UNREACH/FRAG_NEEDED icmp responses they get.  If you're
on the client end of this, you're sunk unless you initiate the
connection specifying a lower MSS.

Linux has a nifty iptables option (clamp-mss-to-pmtu) to rewrite the
MSS in TCP SYN packets when forwarding a packet onto a link with
a lower MTU than the MSS in the packet.  Works like a charm.  If every
packet forwarding device on the Internet did this, PMTUD would not be
needed.  As is, PMTUD is simply broken, due to widespread firewall
misconfiguration.  As in so many other cases of Internet misbehavior,
you can avoid being part of the problem, but you can't be the solution.

Jim Shankland



Re: Seeking Comcast Contact: need to troubleshoot packet loss and/or asymmetric routing issue between Comcast Onvoy

2007-08-02 Thread Adrian Chadd

On Thu, Aug 02, 2007, Jim Shankland wrote:

 Linux has a nifty iptables option (clamp-mss-to-pmtu) to rewrite the
 MSS in TCP SYN packets when forwarding a packet onto a link with
 a lower MTU than the MSS in the packet.  Works like a charm.  If every
 packet forwarding device on the Internet did this, PMTUD would not be
 needed.  As is, PMTUD is simply broken, due to widespread firewall
 misconfiguration.  As in so many other cases of Internet misbehavior,
 you can avoid being part of the problem, but you can't be the solution.

.. non-TCP traffic?




Adrian



Re: Seeking Comcast Contact: need to troubleshoot packet loss and/or asymmetric routing issue between Comcast Onvoy

2007-08-02 Thread Jim Shankland


Adrian Chadd wrote:

On Thu, Aug 02, 2007, Jim Shankland wrote:


Linux has a nifty iptables option (clamp-mss-to-pmtu) to rewrite the
MSS in TCP SYN packets when forwarding a packet onto a link with
a lower MTU than the MSS in the packet.  Works like a charm.  If every
packet forwarding device on the Internet did this, PMTUD would not be
needed.  As is, PMTUD is simply broken, due to widespread firewall
misconfiguration.  As in so many other cases of Internet misbehavior,
you can avoid being part of the problem, but you can't be the solution.


.. non-TCP traffic?


Hmm; I've never actually heard of anybody doing PMTUD on non-TCP
traffic, though it's possible.  Does anybody actually do it?

Jim Shankland


Re: Seeking Comcast Contact: need to troubleshoot packet loss and/or asymmetric routing issue between Comcast Onvoy

2007-08-02 Thread Valdis . Kletnieks
On Thu, 02 Aug 2007 18:33:16 PDT, Jim Shankland said:

 Hmm; I've never actually heard of anybody doing PMTUD on non-TCP
 traffic, though it's possible.  Does anybody actually do it?

AIX 5.2 and earlier supported it for UDP (we're getting out of the AIX
business, so I can't speak to what 5.3 does).  Basically, it would send out a
gratuitous 64K ICMP Echo Request with DF set, and waited to see what came back.
 I ended up turning it off all over, simply because we didn't have enough
UDP-based services that actually hit frag issues to make a difference.

---
'man no' (Network Options) says:

no { -a | -d Attribute | -o Attribute [ =NewValue ] }

udp_pmtu_discover Enables or disables path MTU discovery for UDP applications.
UDP applications must be specifically written to utilize path MTU discovery. A
value of 0 disables the feature, while a value of 1 enables it. This attribute
only applies to AIX 4.2.1 or later. udp_pmtu_discover is a runtime attribute. In
versions prior to AIX 4.3.3, the default value is 0 (disabled); in AIX 4.3.3 and
later versions, the default value is 1 (enabled).
---

The manpage lies - It has to be specifically written to *benefit from* PMTUD.
It would go ahead and do it, and then 98% of the UDP programs wouldn't change
their behavior.  So all you got was lots of gratuitous ICMP mobygrams.

It *may* have made a small difference during a short window, when NFS-over-TCP
support was still rare, and the 4500-octet FDDI MTU was sometimes to be found.


pgpM2BhhEjM7a.pgp
Description: PGP signature


Need a Comcast contact

2007-04-19 Thread John
If you work for Comcast and have the ability to investigate routing problems in 
the northwest, please contact me off-list. An odd routing issue has been 
affecting your customers and ours for about the last month and I am still 
trying to determine exactly what's going on and how to fix it.

(I've already tried all the Comcast NOC numbers and emails that I can find, 
from the NOC database, peering database, WHOIS information, etc, and as a 
Comcast customer I've also tried to go through the standard support channels. 
If anyone here thinks they have a resource that I haven't tried, please let me 
know.)

-John

Re: Comcast contact for the East Coast

2007-03-08 Thread Stephen Kratzer

On Wednesday 07 March 2007 22:57, Dennis Dayman wrote:
 Dennis Dayman wrote:
  Stephen Kratzer wrote:
  On Friday 02 March 2007 20:58, Ashe Canvar wrote:
  Could someone from Comcast please contact us ([EMAIL PROTECTED]).
 
  Customers behind Comcast on the east coast cannot get to our
  216.219.126.0 prefix in Santa Barbara, CA. Comcast's peering with Cox
  on ashbbbrj02-ae0.0.r2.as.cox.net may be to blame.
 
  Regards,
  Ashe Canvar
  Network Engineer
  --
  Citrix Online (AS16815)
  5385 Hollister Avenue
  Santa Barbara, CA 93111 USA
  --
 
  We've been having a similar issue since last Friday; Comcast
  customers are unable to get to our 66.59.96.0/24 prefix through
  Ashburn, Virginia. Could someone from Comcast also contact us at
  [EMAIL PROTECTED]
 
  Also, anyone happen to know of a publically accessible Comcast
  looking glass?
 
  Thanks,
 
  Stephen Kratzer
  Network Engineer II
  CTI Networks, Inc.

 Comcast ops folks said they have stated a network change was made last
 Friday which should have addressed this; are you still having the problem
 and if so, when the most recent time was they ask?

 -Dennis

The issue seems to have been resolved. Thank you.


Re: Comcast contact for the East Coast

2007-03-07 Thread Dennis Dayman


Stephen Kratzer wrote:

On Friday 02 March 2007 20:58, Ashe Canvar wrote:
  

Could someone from Comcast please contact us ([EMAIL PROTECTED]).

Customers behind Comcast on the east coast cannot get to our
216.219.126.0 prefix in Santa Barbara, CA. Comcast's peering with Cox
on ashbbbrj02-ae0.0.r2.as.cox.net may be to blame.

Regards,
Ashe Canvar
Network Engineer
--
Citrix Online (AS16815)
5385 Hollister Avenue
Santa Barbara, CA 93111 USA
--



We've been having a similar issue since last Friday; Comcast customers are 
unable to get to our 66.59.96.0/24 prefix through Ashburn, Virginia. Could 
someone from Comcast also contact us at [EMAIL PROTECTED]


Also, anyone happen to know of a publically accessible Comcast looking glass?

Thanks,

Stephen Kratzer
Network Engineer II
CTI Networks, Inc.


  

I shot this over to Comcast security who can get their op folks on it.



Re: Comcast contact for the East Coast

2007-03-07 Thread Dennis Dayman


Dennis Dayman wrote:

Stephen Kratzer wrote:

On Friday 02 March 2007 20:58, Ashe Canvar wrote:
 

Could someone from Comcast please contact us ([EMAIL PROTECTED]).

Customers behind Comcast on the east coast cannot get to our
216.219.126.0 prefix in Santa Barbara, CA. Comcast's peering with Cox
on ashbbbrj02-ae0.0.r2.as.cox.net may be to blame.

Regards,
Ashe Canvar
Network Engineer
--
Citrix Online (AS16815)
5385 Hollister Avenue
Santa Barbara, CA 93111 USA
--



We've been having a similar issue since last Friday; Comcast 
customers are unable to get to our 66.59.96.0/24 prefix through 
Ashburn, Virginia. Could someone from Comcast also contact us at 
[EMAIL PROTECTED]


Also, anyone happen to know of a publically accessible Comcast 
looking glass?


Thanks,

Stephen Kratzer
Network Engineer II
CTI Networks, Inc.


  


Comcast ops folks said they have stated a network change was made last Friday 
which should have addressed this; are you still having the problem and if so, 
when the most recent time was they ask?

-Dennis





Re: Comcast contact for the East Coast

2007-03-06 Thread Stephen Kratzer

On Friday 02 March 2007 20:58, Ashe Canvar wrote:
 Could someone from Comcast please contact us ([EMAIL PROTECTED]).

 Customers behind Comcast on the east coast cannot get to our
 216.219.126.0 prefix in Santa Barbara, CA. Comcast's peering with Cox
 on ashbbbrj02-ae0.0.r2.as.cox.net may be to blame.

 Regards,
 Ashe Canvar
 Network Engineer
 --
 Citrix Online (AS16815)
 5385 Hollister Avenue
 Santa Barbara, CA 93111 USA
 --

We've been having a similar issue since last Friday; Comcast customers are 
unable to get to our 66.59.96.0/24 prefix through Ashburn, Virginia. Could 
someone from Comcast also contact us at [EMAIL PROTECTED]

Also, anyone happen to know of a publically accessible Comcast looking glass?

Thanks,

Stephen Kratzer
Network Engineer II
CTI Networks, Inc.


Comcast contact for the East Coast

2007-03-02 Thread Ashe Canvar


Could someone from Comcast please contact us ([EMAIL PROTECTED]).

Customers behind Comcast on the east coast cannot get to our
216.219.126.0 prefix in Santa Barbara, CA. Comcast's peering with Cox
on ashbbbrj02-ae0.0.r2.as.cox.net may be to blame.

Regards,
Ashe Canvar
Network Engineer
--
Citrix Online (AS16815)
5385 Hollister Avenue
Santa Barbara, CA 93111 USA
--


Re: Comcast contact for the East Coast

2007-03-02 Thread Jim Popovitch
On Fri, 2007-03-02 at 17:58 -0800, Ashe Canvar wrote:
 Could someone from Comcast please contact us ([EMAIL PROTECTED]).
 
 Customers behind Comcast on the east coast cannot get to our
 216.219.126.0 prefix in Santa Barbara, CA. Comcast's peering with Cox
 on ashbbbrj02-ae0.0.r2.as.cox.net may be to blame.

I'm presently hanging off of Comcast in Atlanta (76.17.105.x) and I can
ping traceroute and ping 216.219.126.1

-Jim P.


signature.asc
Description: This is a digitally signed message part


RE: Comcast contact for the East Coast

2007-03-02 Thread Andrew.Parris

 Could someone from Comcast please contact us  
 ([EMAIL PROTECTED]).

 Customers behind Comcast on the east coast cannot get to our
 216.219.126.0 prefix in Santa Barbara, CA. Comcast's peering with Cox
 on ashbbbrj02-ae0.0.r2.as.cox.net may be to blame.

COX has created ticket HD015981407 for this issue.

A show route shows us that traffic destined for target IP 216.219.126.0
is going from ASHBBBRJ02 to ASHBBBRJ01, and then directly to the Equinix
Public Peering Switch in Ashburn, and then stopping.

I will be contacting Equinix shortly to continue troubleshooting.




-J. Andrew Parris
NOC Engineer
Data Network Operations Center
Cox Communications (AS 22773)
1-888-326-9266, Opt. 1
mailto:[EMAIL PROTECTED]
AIM:  coxnocandpa



Re: Comcast contact for the East Coast

2007-03-02 Thread Steven M. Bellovin

On Fri, 02 Mar 2007 21:08:58 -0500
Jim Popovitch [EMAIL PROTECTED] wrote:

 On Fri, 2007-03-02 at 17:58 -0800, Ashe Canvar wrote:
  Could someone from Comcast please contact us
  ([EMAIL PROTECTED]).
  
  Customers behind Comcast on the east coast cannot get to our
  216.219.126.0 prefix in Santa Barbara, CA. Comcast's peering with
  Cox on ashbbbrj02-ae0.0.r2.as.cox.net may be to blame.
 
 I'm presently hanging off of Comcast in Atlanta (76.17.105.x) and I
 can ping traceroute and ping 216.219.126.1
 
As can I from Comcast in NJ.


--Steve Bellovin, http://www.cs.columbia.edu/~smb


Re: Comcast contact

2006-09-26 Thread Peter Cohen


Anshuman:
A good place to start for operational contacts is both the
puck.nether.net site and the www.peeringdb.com.
i found this:  http://puck.nether.net/netops/nocs.cgi?ispname=comcast
and this:
(you can log in as a guest)...
https://www.peeringdb.com/private/participant_view.php?id=822

now go get them   peter cohen.




On 9/25/06, Anshuman Kanwar [EMAIL PROTECTED] wrote:


Can someone from comcast contact me off list please ?

Thanks,

Ansh Kanwar
Lead Network Engineer
--
Citrix Online (AS16815)
5385 Hollister Avenue
Santa Barbara, CA 93111 USA
--




Comcast contact

2006-09-25 Thread Anshuman Kanwar

Can someone from comcast contact me off list please ?

Thanks,

Ansh Kanwar
Lead Network Engineer
--
Citrix Online (AS16815)
5385 Hollister Avenue
Santa Barbara, CA 93111 USA
--



Comcast contact available?

2006-09-01 Thread Jee Kay


It seems you are null-routing traffic heading towards our /20. If
there are any comcast chaps on this list, please drop me a mail - this
has been going on for a few days now and we're having trouble getting
it escalated to someone with sufficient access to check it.

Thanks,
Ras


Comcast contact also.

2006-01-31 Thread Brian Johnson

Also looking for a Comcast contact for mail abuse issues.

Please reply off-list.

Brian.



Comcast contact

2006-01-30 Thread Jeffrey Sharpe








Looking for a Comcast contact.



Please reply off-list.



Jeff.










Comcast Contact

2005-04-13 Thread Ross Hosman
Could someone from Comcast please email me off list.

Ross Hosman
[EMAIL PROTECTED]


Re: Comcast Contact

2005-04-13 Thread Scott Grayban

On Wednesday April 13 2005 08:04, Ross Hosman wrote:
 Could someone from Comcast please email me off list.
 
 Ross Hosman
 [EMAIL PROTECTED]
 

http://www.nanog.org/email.html

Follow directions..


-- 
Scott Grayban
Security/Abuse Engineer
FCT Enterprises -- www.fctsupport.com


Re: Comcast Contact

2005-04-13 Thread Suresh Ramasubramanian

On 4/13/05, Ross Hosman [EMAIL PROTECTED] wrote:
 Could someone from Comcast please email me off list.
 
 Ross Hosman
 [EMAIL PROTECTED]

If you have an AS, get yourself an inoc-dba phone. Easiest way to
contact network operators that I know of.

-- 
Suresh Ramasubramanian ([EMAIL PROTECTED])


NOC-DBA Phone (was Re: Comcast Contact)

2005-04-13 Thread Jeffrey I. Schiller

I have one, and its cool. However the time I *really* needed it was
because I couldn't reach a particular AS... and of course neither could
my INOC-DBA phone (sigh...).

-Jeff

On Wed, 2005-04-13 at 23:12, Suresh Ramasubramanian wrote:
 On 4/13/05, Ross Hosman [EMAIL PROTECTED] wrote:
  Could someone from Comcast please email me off list.
  
  Ross Hosman
  [EMAIL PROTECTED]
 
 If you have an AS, get yourself an inoc-dba phone. Easiest way to
 contact network operators that I know of.
-- 
=
Jeffrey I. Schiller
MIT Network Manager
Information Services and Technology
Massachusetts Institute of Technology
77 Massachusetts Avenue  Room W92-190
Cambridge, MA 02139-4307
617.253.0161 - Voice
[EMAIL PROTECTED]





Re: INOC-DBA Phone (was Re: Comcast Contact)

2005-04-13 Thread Bill Woodcock

  On Thu, 14 Apr 2005, Jeffrey I. Schiller wrote:
 I have one, and its cool. However the time I *really* needed it was
 because I couldn't reach a particular AS... and of course neither could
 my INOC-DBA phone (sigh...).

There are several ways around that...  Probably the easiest is to have 
your INOC-DBA phone number ring not only the SIP phone on your NOC desk, 
but a couple of commercial gateways like Vonage and BroadVoice and so 
forth, which would not, under most circumstances, all be affected by the 
same outage.  One hopes.  They would then ring PSTN numbers for you.

Another way around the problem, which has been the most common one 
historically, is to put the INOC-DBA phones on different DSL/cable 
providers' lines run into your NOC, as well as on your own network.  Three 
phones, reached through three ASNs, and _something_ should ring.

A third way, which only a few ISPs have done, is to run a separate 
infrastructure out to a few exchanges, just to support those VoIP calls.  
That probably only makes sense if you're doing it anyway, for broader VoIP 
peering.

-Bill



Comcast Contact. (was: RE: AOL scomp)

2005-03-02 Thread chuck goolsbee
Pardon my interruption of the ongoing discussion of SMTP trust models 
and FUSSPs (which I think is very important BTW), but if there is 
somebody from Comcast here that can help us solve an immediate 
related issue, please contact me or one of my postmasters off list?

Normal channels have been attempted unsuccessfully, for a problem 
that has been repeating itself every few days for the past two months.

--chuck goolsbee
digital.forest inc, seattle, wa http://www.forest.net
[EMAIL PROTECTED] - [EMAIL PROTECTED] - 206-838-1630 xt2001 - AIM:chuckgoolsbee
or
[EMAIL PROTECTED] - [EMAIL PROTECTED] - 877-720-0483 xt 2002
Thanks.
--


Comcast Contact

2004-03-10 Thread Matt Hess
Can somebody at comcast.net with a clue about possible ip routing 
problems please contact me off-list.



Re: Need Comcast contact

2004-03-02 Thread up

On Mon, 1 Mar 2004, Brian Bruns wrote:

 Anyone happen to know of a contact for Comcast's mail server administrators?
 I need to discuss an issue with them about their mail servers mailbombing my
 systems from a joe job.

Good luck...the last time I had to contact their email admins, it took two
days to get ahold of someone with a clue.  They apparently outsource their
email.

James Smallacombe PlantageNet, Inc. CEO and Janitor
[EMAIL PROTECTED]   http://3.am
=



Need Comcast contact

2004-03-01 Thread Brian Bruns

Anyone happen to know of a contact for Comcast's mail server administrators?
I need to discuss an issue with them about their mail servers mailbombing my
systems from a joe job.

Thanks.
-- 
Brian Bruns
The Summit Open Source Development Group
Open Solutions For A Closed World / Anti-Spam Resources
http://www.sosdg.org

The Abusive Hosts Blocking List
http://www.ahbl.org



[OT] Need Comcast Contact

2004-02-03 Thread Tim Wesemann

Emails sent *from residential comcast subscribers* to any '@voicenet.com'
address have been disappearing in the Comcast network since Sunday, Feb 31.
There are no bounces or errors of any kind. Mail sent directly to other
domains with the same MX record and even to individual machines within the
MX record themselves work fine, it is only when the envelope recipient
states /[EMAIL PROTECTED]/ does the mail simply disappear (i.e. mail sent
to [EMAIL PROTECTED] disappears while mail sent to
[EMAIL PROTECTED] goes through fine as well as
[EMAIL PROTECTED]).

My company as well as our customers and Comcast customers have together made
many, many phone calls and sent many emails and we cannot get ahold of
anyone with any semblance of a clue and nobody seeems to have the ability to
put us in contact with anyone in your systems and/or network admins (level
1-3 techs, managers and even case resolution specialists).

Can someone please contact me off-list in regards to this situation?

Has anyone else had similar problems?

Thanks.

--
Tim Wesemann
Voicenet Systems Administration



Re: [OT] Need Comcast Contact

2004-02-03 Thread Tim Wesemann

 Well sure, they are sent on a date that doesn't exist.  Feb 31 can never
 happen.

Pardon, that should have read Sunday, Feb 01 2004 AD (Chinese year of the
monkey). =]

--
Tim Wesemann
Voicenet Systems Administration