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Is it a DNS problem?

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Vieux 15/03/2007, 17h41   #1
Richard
Aucun Avatar
 
Messages: n/a
Hébergeur:
Par défaut Is it a DNS problem?

We have internal and external dns servers (2003). We can browse and do
nslookup on any sites except for sites that are hosted by
"clearchannel.com".

Clearchannel has the following dns and web servers and they host many radio
and tv stations on the same web servers:

dns servers:
dns1.clearchannel.com
dns2.clearchannel.com
ns1.clearchannel.com
ns2.clearchannel.com

web servers:
207.230.150.254
207.230.154.254
207.230.156.254

Here are some of their sites that we cannot get to:
www.kbig104.com
www.foxsports610.com
www.y92.com
www.talk960.com


When we do an nslookup we get the following:
DNS request timed out.
timeout was 2 seconds.

We can get to their sites using our separate dsl line that we use for
testing.

We have no filtering set in our firewall for their ip addresses. Could this
be an issue with our dns? Any is appreciated. Thanks!

Richard




  Réponse avec citation
Vieux 15/03/2007, 20h44   #2
Greg Lindsay [MSFT]
Aucun Avatar
 
Messages: n/a
Hébergeur:
Par défaut Re: Is it a DNS problem?

Hi Richard,

The most likely problem is that your IP address range is on a blacklist that
Clearchannel is using. A way to test this would be to try to nslookup or
browse to those web sites from a different IP address.

--
Greg Lindsay [MSFT]

Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.

"Richard" <rdumag@hotmail.com> wrote in message
news:uLHHCDyZHHA.4000@TK2MSFTNGP02.phx.gbl...
> We have internal and external dns servers (2003). We can browse and do
> nslookup on any sites except for sites that are hosted by
> "clearchannel.com".
>
> Clearchannel has the following dns and web servers and they host many
> radio and tv stations on the same web servers:
>
> dns servers:
> dns1.clearchannel.com
> dns2.clearchannel.com
> ns1.clearchannel.com
> ns2.clearchannel.com
>
> web servers:
> 207.230.150.254
> 207.230.154.254
> 207.230.156.254
>
> Here are some of their sites that we cannot get to:
> www.kbig104.com
> www.foxsports610.com
> www.y92.com
> www.talk960.com
>
>
> When we do an nslookup we get the following:
> DNS request timed out.
> timeout was 2 seconds.
>
> We can get to their sites using our separate dsl line that we use for
> testing.
>
> We have no filtering set in our firewall for their ip addresses. Could
> this be an issue with our dns? Any is appreciated. Thanks!
>
> Richard
>
>
>
>



  Réponse avec citation
Vieux 15/03/2007, 23h48   #3
Richard
Aucun Avatar
 
Messages: n/a
Hébergeur:
Par défaut Re: Is it a DNS problem?

Thanks Greg. Yes, we can browse and do nslookup from a different ip. I
have Clearchannel's contact info so I'll give them a call. Thank again!





"Greg Lindsay [MSFT]" <greglin@microsoft.com> wrote in message
news:ex$LzpzZHHA.1220@TK2MSFTNGP03.phx.gbl...
> Hi Richard,
>
> The most likely problem is that your IP address range is on a blacklist
> that Clearchannel is using. A way to test this would be to try to nslookup
> or browse to those web sites from a different IP address.
>
> --
> Greg Lindsay [MSFT]
>
> Disclaimer: This posting is provided "AS IS" with no warranties, and
> confers no rights.
>
> "Richard" <rdumag@hotmail.com> wrote in message
> news:uLHHCDyZHHA.4000@TK2MSFTNGP02.phx.gbl...
>> We have internal and external dns servers (2003). We can browse and do
>> nslookup on any sites except for sites that are hosted by
>> "clearchannel.com".
>>
>> Clearchannel has the following dns and web servers and they host many
>> radio and tv stations on the same web servers:
>>
>> dns servers:
>> dns1.clearchannel.com
>> dns2.clearchannel.com
>> ns1.clearchannel.com
>> ns2.clearchannel.com
>>
>> web servers:
>> 207.230.150.254
>> 207.230.154.254
>> 207.230.156.254
>>
>> Here are some of their sites that we cannot get to:
>> www.kbig104.com
>> www.foxsports610.com
>> www.y92.com
>> www.talk960.com
>>
>>
>> When we do an nslookup we get the following:
>> DNS request timed out.
>> timeout was 2 seconds.
>>
>> We can get to their sites using our separate dsl line that we use for
>> testing.
>>
>> We have no filtering set in our firewall for their ip addresses. Could
>> this be an issue with our dns? Any is appreciated. Thanks!
>>
>> Richard
>>
>>
>>
>>

>
>



  Réponse avec citation
Vieux 16/03/2007, 19h02   #4
Richard
Aucun Avatar
 
Messages: n/a
Hébergeur:
Par défaut Re: Is it a DNS problem?

Hi Greg,

I called Clearchannel and they said our ip address is not on their
blacklist. So the ball is back on our end. One thing I noticed on our dns
servers is that eventhough there are entries in the cached lookups for their
sites, they only show dns info....nothing for host(A). Other cached lookups
show both dns and host info.

Any idea? Thanks!


Richard




"Richard" <rdumag@hotmail.com> wrote in message
news:eLVHYQ1ZHHA.4396@TK2MSFTNGP06.phx.gbl...
> Thanks Greg. Yes, we can browse and do nslookup from a different ip. I
> have Clearchannel's contact info so I'll give them a call. Thank again!
>
>
>
>
>
> "Greg Lindsay [MSFT]" <greglin@microsoft.com> wrote in message
> news:ex$LzpzZHHA.1220@TK2MSFTNGP03.phx.gbl...
>> Hi Richard,
>>
>> The most likely problem is that your IP address range is on a blacklist
>> that Clearchannel is using. A way to test this would be to try to
>> nslookup or browse to those web sites from a different IP address.
>>
>> --
>> Greg Lindsay [MSFT]
>>
>> Disclaimer: This posting is provided "AS IS" with no warranties, and
>> confers no rights.
>>
>> "Richard" <rdumag@hotmail.com> wrote in message
>> news:uLHHCDyZHHA.4000@TK2MSFTNGP02.phx.gbl...
>>> We have internal and external dns servers (2003). We can browse and do
>>> nslookup on any sites except for sites that are hosted by
>>> "clearchannel.com".
>>>
>>> Clearchannel has the following dns and web servers and they host many
>>> radio and tv stations on the same web servers:
>>>
>>> dns servers:
>>> dns1.clearchannel.com
>>> dns2.clearchannel.com
>>> ns1.clearchannel.com
>>> ns2.clearchannel.com
>>>
>>> web servers:
>>> 207.230.150.254
>>> 207.230.154.254
>>> 207.230.156.254
>>>
>>> Here are some of their sites that we cannot get to:
>>> www.kbig104.com
>>> www.foxsports610.com
>>> www.y92.com
>>> www.talk960.com
>>>
>>>
>>> When we do an nslookup we get the following:
>>> DNS request timed out.
>>> timeout was 2 seconds.
>>>
>>> We can get to their sites using our separate dsl line that we use for
>>> testing.
>>>
>>> We have no filtering set in our firewall for their ip addresses. Could
>>> this be an issue with our dns? Any is appreciated. Thanks!
>>>
>>> Richard
>>>
>>>
>>>
>>>

>>
>>

>
>



  Réponse avec citation
Vieux 16/03/2007, 20h19   #5
Greg Lindsay [MSFT]
Aucun Avatar
 
Messages: n/a
Hébergeur:
Par défaut Re: Is it a DNS problem?

That is probably a result of the DNS timeout.

Try a telnet to port 53. If you just time out, then either there is a
firewall blocking you, or a routing problem. See below for an example.

C:\>telnet dns1.clearchannel.com 53

-- or --

C:\>telnet 207.230.136.193 53

When I do this, it connects and then the screen clears. To disconnect, hit
return.

If it just sits trying to connect, this is usually a firewall or access list
blocking the source or destination. It could also be a routing problem, but
this is less probable. I tried to verify routing to this DNS server, but
ICMP is blocked along the path. I would at least check routing with tracert
to make sure you can get off your LAN when you try to traceroute to
clearchannel.

It may still be a blacklist, but one that is used by an ISP between you and
clearchannel. It might be a good idea to call your ISP's support and ask if
they can get to clearchannel. If they don't have a problem, this would
narrow it down quite a bit.

--
Greg Lindsay [MSFT]

Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.

"Richard" <rdumag@hotmail.com> wrote in message
news:OQf5PV$ZHHA.208@TK2MSFTNGP05.phx.gbl...
> Hi Greg,
>
> I called Clearchannel and they said our ip address is not on their
> blacklist. So the ball is back on our end. One thing I noticed on our
> dns servers is that eventhough there are entries in the cached lookups for
> their sites, they only show dns info....nothing for host(A). Other cached
> lookups show both dns and host info.
>
> Any idea? Thanks!
>
>
> Richard
>
>
>
>
> "Richard" <rdumag@hotmail.com> wrote in message
> news:eLVHYQ1ZHHA.4396@TK2MSFTNGP06.phx.gbl...
>> Thanks Greg. Yes, we can browse and do nslookup from a different ip. I
>> have Clearchannel's contact info so I'll give them a call. Thank again!
>>
>>
>>
>>
>>
>> "Greg Lindsay [MSFT]" <greglin@microsoft.com> wrote in message
>> news:ex$LzpzZHHA.1220@TK2MSFTNGP03.phx.gbl...
>>> Hi Richard,
>>>
>>> The most likely problem is that your IP address range is on a blacklist
>>> that Clearchannel is using. A way to test this would be to try to
>>> nslookup or browse to those web sites from a different IP address.
>>>
>>> --
>>> Greg Lindsay [MSFT]
>>>
>>> Disclaimer: This posting is provided "AS IS" with no warranties, and
>>> confers no rights.
>>>
>>> "Richard" <rdumag@hotmail.com> wrote in message
>>> news:uLHHCDyZHHA.4000@TK2MSFTNGP02.phx.gbl...
>>>> We have internal and external dns servers (2003). We can browse and do
>>>> nslookup on any sites except for sites that are hosted by
>>>> "clearchannel.com".
>>>>
>>>> Clearchannel has the following dns and web servers and they host many
>>>> radio and tv stations on the same web servers:
>>>>
>>>> dns servers:
>>>> dns1.clearchannel.com
>>>> dns2.clearchannel.com
>>>> ns1.clearchannel.com
>>>> ns2.clearchannel.com
>>>>
>>>> web servers:
>>>> 207.230.150.254
>>>> 207.230.154.254
>>>> 207.230.156.254
>>>>
>>>> Here are some of their sites that we cannot get to:
>>>> www.kbig104.com
>>>> www.foxsports610.com
>>>> www.y92.com
>>>> www.talk960.com
>>>>
>>>>
>>>> When we do an nslookup we get the following:
>>>> DNS request timed out.
>>>> timeout was 2 seconds.
>>>>
>>>> We can get to their sites using our separate dsl line that we use for
>>>> testing.
>>>>
>>>> We have no filtering set in our firewall for their ip addresses. Could
>>>> this be an issue with our dns? Any is appreciated. Thanks!
>>>>
>>>> Richard
>>>>
>>>>
>>>>
>>>>
>>>
>>>

>>
>>

>
>



  Réponse avec citation
Vieux 16/03/2007, 22h25   #6
Richard
Aucun Avatar
 
Messages: n/a
Hébergeur:
Par défaut Re: Is it a DNS problem?

Hi Greg,

I did the telnet command and can connect to all four of their dns servers in
an instant. We have a dsl line the we use for testing from the same ISP and
we can get to Clearchannel websites. So I'm assuming that our ISP can get
to their websites as well. Will probably give them a call and ask anyway.

Back to the telnet command, since I can connect to their dns, is there
anything else I should try? Thanks for your assistance!


Richard




"Greg Lindsay [MSFT]" <greglin@microsoft.com> wrote in message
news:OJk19$$ZHHA.5032@TK2MSFTNGP02.phx.gbl...
> That is probably a result of the DNS timeout.
>
> Try a telnet to port 53. If you just time out, then either there is a
> firewall blocking you, or a routing problem. See below for an example.
>
> C:\>telnet dns1.clearchannel.com 53
>
> -- or --
>
> C:\>telnet 207.230.136.193 53
>
> When I do this, it connects and then the screen clears. To disconnect, hit
> return.
>
> If it just sits trying to connect, this is usually a firewall or access
> list blocking the source or destination. It could also be a routing
> problem, but this is less probable. I tried to verify routing to this DNS
> server, but ICMP is blocked along the path. I would at least check routing
> with tracert to make sure you can get off your LAN when you try to
> traceroute to clearchannel.
>
> It may still be a blacklist, but one that is used by an ISP between you
> and clearchannel. It might be a good idea to call your ISP's support and
> ask if they can get to clearchannel. If they don't have a problem, this
> would narrow it down quite a bit.
>
> --
> Greg Lindsay [MSFT]
>
> Disclaimer: This posting is provided "AS IS" with no warranties, and
> confers no rights.
>
> "Richard" <rdumag@hotmail.com> wrote in message
> news:OQf5PV$ZHHA.208@TK2MSFTNGP05.phx.gbl...
>> Hi Greg,
>>
>> I called Clearchannel and they said our ip address is not on their
>> blacklist. So the ball is back on our end. One thing I noticed on our
>> dns servers is that eventhough there are entries in the cached lookups
>> for their sites, they only show dns info....nothing for host(A). Other
>> cached lookups show both dns and host info.
>>
>> Any idea? Thanks!
>>
>>
>> Richard
>>
>>
>>
>>
>> "Richard" <rdumag@hotmail.com> wrote in message
>> news:eLVHYQ1ZHHA.4396@TK2MSFTNGP06.phx.gbl...
>>> Thanks Greg. Yes, we can browse and do nslookup from a different ip. I
>>> have Clearchannel's contact info so I'll give them a call. Thank again!
>>>
>>>
>>>
>>>
>>>
>>> "Greg Lindsay [MSFT]" <greglin@microsoft.com> wrote in message
>>> news:ex$LzpzZHHA.1220@TK2MSFTNGP03.phx.gbl...
>>>> Hi Richard,
>>>>
>>>> The most likely problem is that your IP address range is on a blacklist
>>>> that Clearchannel is using. A way to test this would be to try to
>>>> nslookup or browse to those web sites from a different IP address.
>>>>
>>>> --
>>>> Greg Lindsay [MSFT]
>>>>
>>>> Disclaimer: This posting is provided "AS IS" with no warranties, and
>>>> confers no rights.
>>>>
>>>> "Richard" <rdumag@hotmail.com> wrote in message
>>>> news:uLHHCDyZHHA.4000@TK2MSFTNGP02.phx.gbl...
>>>>> We have internal and external dns servers (2003). We can browse and
>>>>> do nslookup on any sites except for sites that are hosted by
>>>>> "clearchannel.com".
>>>>>
>>>>> Clearchannel has the following dns and web servers and they host many
>>>>> radio and tv stations on the same web servers:
>>>>>
>>>>> dns servers:
>>>>> dns1.clearchannel.com
>>>>> dns2.clearchannel.com
>>>>> ns1.clearchannel.com
>>>>> ns2.clearchannel.com
>>>>>
>>>>> web servers:
>>>>> 207.230.150.254
>>>>> 207.230.154.254
>>>>> 207.230.156.254
>>>>>
>>>>> Here are some of their sites that we cannot get to:
>>>>> www.kbig104.com
>>>>> www.foxsports610.com
>>>>> www.y92.com
>>>>> www.talk960.com
>>>>>
>>>>>
>>>>> When we do an nslookup we get the following:
>>>>> DNS request timed out.
>>>>> timeout was 2 seconds.
>>>>>
>>>>> We can get to their sites using our separate dsl line that we use for
>>>>> testing.
>>>>>
>>>>> We have no filtering set in our firewall for their ip addresses.
>>>>> Could this be an issue with our dns? Any is appreciated.
>>>>> Thanks!
>>>>>
>>>>> Richard
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>
>>>

>>
>>

>
>



  Réponse avec citation
Vieux 17/03/2007, 02h43   #7
Greg Lindsay [MSFT]
Aucun Avatar
 
Messages: n/a
Hébergeur:
Par défaut Re: Is it a DNS problem?

That is an important result that you can get to their DNS servers using
telnet. Apparently there isn't a firewall blocking you as I suspected.

Try setting debug on nslookup and see what you get.

c:\> nslookup <return>
> set d2 <return>
> www.y92.com 207.230.144.18


This should give you some3 ful debug information. You can also increase
the timeout with "set timeout=100" and see if this makes a difference.

To see all the options, type a "?" at the > prompt. To disable debug, you
would type "set nod2" then "set nodebug", etc.

This might just be a timeout problem. Do you have forwarders set up? Adding
the authoritative servers as forwarders for these specific domains might
solve your problem.

--
Greg Lindsay [MSFT]

Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.

"Richard" <rdumag@hotmail.com> wrote in message
news:uz4tYGBaHHA.4520@TK2MSFTNGP06.phx.gbl...
> Hi Greg,
>
> I did the telnet command and can connect to all four of their dns servers
> in an instant. We have a dsl line the we use for testing from the same
> ISP and we can get to Clearchannel websites. So I'm assuming that our ISP
> can get to their websites as well. Will probably give them a call and ask
> anyway.
>
> Back to the telnet command, since I can connect to their dns, is there
> anything else I should try? Thanks for your assistance!
>
>
> Richard
>
>
>
>
> "Greg Lindsay [MSFT]" <greglin@microsoft.com> wrote in message
> news:OJk19$$ZHHA.5032@TK2MSFTNGP02.phx.gbl...
>> That is probably a result of the DNS timeout.
>>
>> Try a telnet to port 53. If you just time out, then either there is a
>> firewall blocking you, or a routing problem. See below for an example.
>>
>> C:\>telnet dns1.clearchannel.com 53
>>
>> -- or --
>>
>> C:\>telnet 207.230.136.193 53
>>
>> When I do this, it connects and then the screen clears. To disconnect,
>> hit return.
>>
>> If it just sits trying to connect, this is usually a firewall or access
>> list blocking the source or destination. It could also be a routing
>> problem, but this is less probable. I tried to verify routing to this DNS
>> server, but ICMP is blocked along the path. I would at least check
>> routing with tracert to make sure you can get off your LAN when you try
>> to traceroute to clearchannel.
>>
>> It may still be a blacklist, but one that is used by an ISP between you
>> and clearchannel. It might be a good idea to call your ISP's support and
>> ask if they can get to clearchannel. If they don't have a problem, this
>> would narrow it down quite a bit.
>>
>> --
>> Greg Lindsay [MSFT]
>>
>> Disclaimer: This posting is provided "AS IS" with no warranties, and
>> confers no rights.
>>
>> "Richard" <rdumag@hotmail.com> wrote in message
>> news:OQf5PV$ZHHA.208@TK2MSFTNGP05.phx.gbl...
>>> Hi Greg,
>>>
>>> I called Clearchannel and they said our ip address is not on their
>>> blacklist. So the ball is back on our end. One thing I noticed on our
>>> dns servers is that eventhough there are entries in the cached lookups
>>> for their sites, they only show dns info....nothing for host(A). Other
>>> cached lookups show both dns and host info.
>>>
>>> Any idea? Thanks!
>>>
>>>
>>> Richard
>>>
>>>
>>>
>>>
>>> "Richard" <rdumag@hotmail.com> wrote in message
>>> news:eLVHYQ1ZHHA.4396@TK2MSFTNGP06.phx.gbl...
>>>> Thanks Greg. Yes, we can browse and do nslookup from a different ip.
>>>> I have Clearchannel's contact info so I'll give them a call. Thank
>>>> again!
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> "Greg Lindsay [MSFT]" <greglin@microsoft.com> wrote in message
>>>> news:ex$LzpzZHHA.1220@TK2MSFTNGP03.phx.gbl...
>>>>> Hi Richard,
>>>>>
>>>>> The most likely problem is that your IP address range is on a
>>>>> blacklist that Clearchannel is using. A way to test this would be to
>>>>> try to nslookup or browse to those web sites from a different IP
>>>>> address.
>>>>>
>>>>> --
>>>>> Greg Lindsay [MSFT]
>>>>>
>>>>> Disclaimer: This posting is provided "AS IS" with no warranties, and
>>>>> confers no rights.
>>>>>
>>>>> "Richard" <rdumag@hotmail.com> wrote in message
>>>>> news:uLHHCDyZHHA.4000@TK2MSFTNGP02.phx.gbl...
>>>>>> We have internal and external dns servers (2003). We can browse and
>>>>>> do nslookup on any sites except for sites that are hosted by
>>>>>> "clearchannel.com".
>>>>>>
>>>>>> Clearchannel has the following dns and web servers and they host many
>>>>>> radio and tv stations on the same web servers:
>>>>>>
>>>>>> dns servers:
>>>>>> dns1.clearchannel.com
>>>>>> dns2.clearchannel.com
>>>>>> ns1.clearchannel.com
>>>>>> ns2.clearchannel.com
>>>>>>
>>>>>> web servers:
>>>>>> 207.230.150.254
>>>>>> 207.230.154.254
>>>>>> 207.230.156.254
>>>>>>
>>>>>> Here are some of their sites that we cannot get to:
>>>>>> www.kbig104.com
>>>>>> www.foxsports610.com
>>>>>> www.y92.com
>>>>>> www.talk960.com
>>>>>>
>>>>>>
>>>>>> When we do an nslookup we get the following:
>>>>>> DNS request timed out.
>>>>>> timeout was 2 seconds.
>>>>>>
>>>>>> We can get to their sites using our separate dsl line that we use for
>>>>>> testing.
>>>>>>
>>>>>> We have no filtering set in our firewall for their ip addresses.
>>>>>> Could this be an issue with our dns? Any is appreciated.
>>>>>> Thanks!
>>>>>>
>>>>>> Richard
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>
>>>

>>
>>

>
>



  Réponse avec citation
Vieux 19/03/2007, 17h28   #8
Richard
Aucun Avatar
 
Messages: n/a
Hébergeur:
Par défaut Re: Is it a DNS problem?

It's working now Greg! I populated the dns forwarders with our isp's ip
addresses and it worked. Thank you for all your !!!




"Greg Lindsay [MSFT]" <greglin@microsoft.com> wrote in message
news:eLotoWDaHHA.3268@TK2MSFTNGP04.phx.gbl...
> That is an important result that you can get to their DNS servers using
> telnet. Apparently there isn't a firewall blocking you as I suspected.
>
> Try setting debug on nslookup and see what you get.
>
> c:\> nslookup <return>
>> set d2 <return>
>> www.y92.com 207.230.144.18

>
> This should give you some3 ful debug information. You can also
> increase the timeout with "set timeout=100" and see if this makes a
> difference.
>
> To see all the options, type a "?" at the > prompt. To disable debug, you
> would type "set nod2" then "set nodebug", etc.
>
> This might just be a timeout problem. Do you have forwarders set up?
> Adding the authoritative servers as forwarders for these specific domains
> might solve your problem.
>
> --
> Greg Lindsay [MSFT]
>
> Disclaimer: This posting is provided "AS IS" with no warranties, and
> confers no rights.
>
> "Richard" <rdumag@hotmail.com> wrote in message
> news:uz4tYGBaHHA.4520@TK2MSFTNGP06.phx.gbl...
>> Hi Greg,
>>
>> I did the telnet command and can connect to all four of their dns servers
>> in an instant. We have a dsl line the we use for testing from the same
>> ISP and we can get to Clearchannel websites. So I'm assuming that our
>> ISP can get to their websites as well. Will probably give them a call
>> and ask anyway.
>>
>> Back to the telnet command, since I can connect to their dns, is there
>> anything else I should try? Thanks for your assistance!
>>
>>
>> Richard
>>
>>
>>
>>
>> "Greg Lindsay [MSFT]" <greglin@microsoft.com> wrote in message
>> news:OJk19$$ZHHA.5032@TK2MSFTNGP02.phx.gbl...
>>> That is probably a result of the DNS timeout.
>>>
>>> Try a telnet to port 53. If you just time out, then either there is a
>>> firewall blocking you, or a routing problem. See below for an example.
>>>
>>> C:\>telnet dns1.clearchannel.com 53
>>>
>>> -- or --
>>>
>>> C:\>telnet 207.230.136.193 53
>>>
>>> When I do this, it connects and then the screen clears. To disconnect,
>>> hit return.
>>>
>>> If it just sits trying to connect, this is usually a firewall or access
>>> list blocking the source or destination. It could also be a routing
>>> problem, but this is less probable. I tried to verify routing to this
>>> DNS server, but ICMP is blocked along the path. I would at least check
>>> routing with tracert to make sure you can get off your LAN when you try
>>> to traceroute to clearchannel.
>>>
>>> It may still be a blacklist, but one that is used by an ISP between you
>>> and clearchannel. It might be a good idea to call your ISP's support and
>>> ask if they can get to clearchannel. If they don't have a problem, this
>>> would narrow it down quite a bit.
>>>
>>> --
>>> Greg Lindsay [MSFT]
>>>
>>> Disclaimer: This posting is provided "AS IS" with no warranties, and
>>> confers no rights.
>>>
>>> "Richard" <rdumag@hotmail.com> wrote in message
>>> news:OQf5PV$ZHHA.208@TK2MSFTNGP05.phx.gbl...
>>>> Hi Greg,
>>>>
>>>> I called Clearchannel and they said our ip address is not on their
>>>> blacklist. So the ball is back on our end. One thing I noticed on our
>>>> dns servers is that eventhough there are entries in the cached lookups
>>>> for their sites, they only show dns info....nothing for host(A). Other
>>>> cached lookups show both dns and host info.
>>>>
>>>> Any idea? Thanks!
>>>>
>>>>
>>>> Richard
>>>>
>>>>
>>>>
>>>>
>>>> "Richard" <rdumag@hotmail.com> wrote in message
>>>> news:eLVHYQ1ZHHA.4396@TK2MSFTNGP06.phx.gbl...
>>>>> Thanks Greg. Yes, we can browse and do nslookup from a different ip.
>>>>> I have Clearchannel's contact info so I'll give them a call. Thank
>>>>> again!
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> "Greg Lindsay [MSFT]" <greglin@microsoft.com> wrote in message
>>>>> news:ex$LzpzZHHA.1220@TK2MSFTNGP03.phx.gbl...
>>>>>> Hi Richard,
>>>>>>
>>>>>> The most likely problem is that your IP address range is on a
>>>>>> blacklist that Clearchannel is using. A way to test this would be to
>>>>>> try to nslookup or browse to those web sites from a different IP
>>>>>> address.
>>>>>>
>>>>>> --
>>>>>> Greg Lindsay [MSFT]
>>>>>>
>>>>>> Disclaimer: This posting is provided "AS IS" with no warranties, and
>>>>>> confers no rights.
>>>>>>
>>>>>> "Richard" <rdumag@hotmail.com> wrote in message
>>>>>> news:uLHHCDyZHHA.4000@TK2MSFTNGP02.phx.gbl...
>>>>>>> We have internal and external dns servers (2003). We can browse and
>>>>>>> do nslookup on any sites except for sites that are hosted by
>>>>>>> "clearchannel.com".
>>>>>>>
>>>>>>> Clearchannel has the following dns and web servers and they host
>>>>>>> many radio and tv stations on the same web servers:
>>>>>>>
>>>>>>> dns servers:
>>>>>>> dns1.clearchannel.com
>>>>>>> dns2.clearchannel.com
>>>>>>> ns1.clearchannel.com
>>>>>>> ns2.clearchannel.com
>>>>>>>
>>>>>>> web servers:
>>>>>>> 207.230.150.254
>>>>>>> 207.230.154.254
>>>>>>> 207.230.156.254
>>>>>>>
>>>>>>> Here are some of their sites that we cannot get to:
>>>>>>> www.kbig104.com
>>>>>>> www.foxsports610.com
>>>>>>> www.y92.com
>>>>>>> www.talk960.com
>>>>>>>
>>>>>>>
>>>>>>> When we do an nslookup we get the following:
>>>>>>> DNS request timed out.
>>>>>>> timeout was 2 seconds.
>>>>>>>
>>>>>>> We can get to their sites using our separate dsl line that we use
>>>>>>> for testing.
>>>>>>>
>>>>>>> We have no filtering set in our firewall for their ip addresses.
>>>>>>> Could this be an issue with our dns? Any is appreciated.
>>>>>>> Thanks!
>>>>>>>
>>>>>>> Richard
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>
>>>

>>
>>

>
>



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