[ale] Comcast DNS

[Björn Gustafsson]

Do you think that the performance difference is in the DNS?  If so,
it's pretty unlikely that changing the tertiary server will provide
the most help.  You should only be hitting the third one if the first
two servers fail, which would be rare in the extreme.

When you performed the nslookup commands, did they return in less than
a second?  If they are fast, I would suspect that your performance
problem is from some other cause than DNS.

It's curious that you use Internap's name servers.  I presume that's
something you selected yourself at some time, is that true?

On Wed, May 27, 2009 at 4:30 PM, Scott <skotchman at gmail.com> wrote:
> Since moving from Charter to Comcast I've noticed that connecting to
> sites have drastically slowed down. My DNS config used to be:
> Primary DNS: 64.94.1.1
> Secondary DNS: 64.94.1.33
> Tertiary DNS: (I don't remember for Charter)
> DNS search path: nothing specified
>
> Now my config is:
>
> Primary DNS: 64.94.1.1
> Secondary DNS: 64.94.1.33
> Tertiary DNS: 68.87.68.162
> DNS search path: hsd1.ga.comcast.net
>
> When I do a nslookup of DNS 1 & DNS 3 I get:
> [scott at ncc1701f ~]$ nslookup 64.94.1.1
> Server:        64.94.1.1
> Address:    64.94.1.1#53
>
> Non-authoritative answer:
> 1.1.94.64.in-addr.arpa    name = ns1.acs.pnap.net.
>
> Authoritative answers can be found from:
> 1.94.64.in-addr.arpa    nameserver = ns-c.pnap.net.
> 1.94.64.in-addr.arpa    nameserver = ns-d.pnap.net.
> 1.94.64.in-addr.arpa    nameserver = ns-a.pnap.net.
> 1.94.64.in-addr.arpa    nameserver = ns-b.pnap.net.
> ns-a.pnap.net    internet address = 64.94.123.4
> ns-b.pnap.net    internet address = 64.94.123.36
> ns-c.pnap.net    internet address = 64.95.61.4
> ns-d.pnap.net    internet address = 64.95.61.36
>
> [scott at ncc1701f ~]$ nslookup 68.87.68.162
> Server:        64.94.1.1
> Address:    64.94.1.1#53
>
> Non-authoritative answer:
> 162.68.87.68.in-addr.arpa    name = cns.s3woodstock.ga.atlanta.comcast.net.
>
> Authoritative answers can be found from:
> 87.68.in-addr.arpa    nameserver = DNS103.comcast.net.
> 87.68.in-addr.arpa    nameserver = DNS101.comcast.net.
> 87.68.in-addr.arpa    nameserver = DNS102.comcast.net.
>
> Any suggestions as to what I should use? And how would I manually set
> it, as I'm using DHCP form my Linksys router that only has places for
> DNS 1 & 2.
>
> TIA
> Scott

-- 
Björn Gustafsson