[Dnsmasq-discuss] Help Req: Name server discovery
chekh at pcbi.upenn.edu
Sat May 31 19:12:08 BST 2008
> Does anyone have suggestions for finding name servers?
There are some available public name servers you can query, such as the
ones provided by the OpenDNS folks.
> After spending all morning running dig, I'm frustrated. For example, I
> stumbled across "orange.rr.com", which contains name servers for Time
> Warner Cable customers in Orange County California. But I don't know
> what domain to use for TWC customers in Los Angeles County and I don't
> know how to find out except to ask for name resolution on every
> conceivable IP address in likely netblocks.
$ dig orange.rr.com
; <<>> DiG 9.3.3rc2 <<>> orange.rr.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23855
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2
;; QUESTION SECTION:
;orange.rr.com. IN A
;; ANSWER SECTION:
orange.rr.com. 86400 IN A 188.8.131.52
;; AUTHORITY SECTION:
orange.rr.com. 5375 IN NS dns-pri-01.orange.rr.com.
orange.rr.com. 5375 IN NS dns-sec-01.orange.rr.com.
;; ADDITIONAL SECTION:
dns-sec-01.orange.rr.com. 1775 IN A 184.108.40.206
dns-pri-01.orange.rr.com. 1775 IN A 220.127.116.11
;; Query time: 74 msec
;; SERVER: 10.10.70.5#53(10.10.70.5)
;; WHEN: Sat May 31 14:05:08 2008
;; MSG SIZE rcvd: 129
You can probably use 18.104.22.168,39 from LA, it's still very close on
> One might expect that a question posed to technical support or a search
> of TW's web site might prove productive, but "No Joy".
If you're on their network, you're using DHCP, and the appropriate name
servers get set automatically.
> If anyone can provide syntax /content for dig commands, or a script, or
> anything else helpful, please post. I believe many people in this group
> would be interested.
I guess I don't understand what you're asking for, exactly.
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