Another data point for you:
On Aug 28, I wrote this open message on the NANOG mailing list:
I discovered that NetSuite's dns servers ens0 & 1 .netsuite.com are
invisible from Comcast's business services in the Chicago area(limits of
my testing abilities) but I can reach these same servers from a Linode
virtual system in the Dallas, TX area.
Looks like it's been this way for at least two months.
If someone from NetSuite could say hi and look into it, I am sure it
will help NetSuite more than me.
Lyle Giese
LCR Computer Services, Inc.
I never heard back from anyone, but I can reach them today from my
Comcast business connection in the Chicago area right now.
On 09/11/14 07:51, Dave Brockman wrote:
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Hello All,
I am having difficulty resolving Reverse DNS for 167.216.129.170,
and I'm not entirely certain why. If I just do a dig -x
167.216.129.170 I get:
; <<>> DiG 9.7.3 <<>> -x 167.216.129.170
;; global options: +cmd
;; connection timed out; no servers could be reached
If I dig -x +trace 167.216.129.170:
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 28671
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;167.216.129.170. IN A
;; AUTHORITY SECTION:
. 10549 IN SOA a.root-servers.net.
nstld.verisign-grs.com. 2014091100 1800 900 604800 86400
and finally, if I dig -x 167.216.129.170 @8.8.8.8:
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 58383
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;170.129.216.167.in-addr.arpa. IN PTR
;; ANSWER SECTION:
170.129.216.167.in-addr.arpa. 3047 IN CNAME
170.0-24.129.216.167.in-addr.arpa.
170.0-24.129.216.167.in-addr.arpa. 3047 IN PTR nmail2.netsuite.com.
This is impacting my ability to receive transactional emails from this
IP address in particular. My DNS server is running Bind 9.7.3 on
Debian Squeeze. I thought perhaps my DNS server was being blocked,
but that wouldn't explain the NXDOMAIN I don't believe. I apologize
in advance if this is something simple and/or obvious, but can anyone
explain what is happening and/or how to correct it? Many thanks in
advance!
Regards,
dtb
Dave Brockman
Senior Network Engineer
- --
"Some things in life can never be fully appreciated nor understood
unless experienced firsthand. Some things in networking can never be
fully understood by someone who neither builds commercial networking
equipment nor runs an operational network." RFC 1925
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