Dynamic DNS updates IP, but does not propagate sub domain

482947

New Member
Hello, Mark, Sproskin,

I've been able to update the dynamic DNS for a sub domain's IP address, but the sub domain name does not propagate:

<<
# traceroute 75.72.167.152
# traceroute to 75.72.167.152 (75.72.167.152), 64 hops max
1 10.12.0.1 90.548ms 94.324ms 91.668ms
2 67.215.234.65 89.336ms 90.486ms 91.622ms
3 96.44.180.1 89.892ms 89.175ms 91.164ms
4 129.250.201.49 93.480ms 91.096ms 90.241ms
5 129.250.2.221 90.295ms 90.517ms 91.318ms
6 50.242.151.61 94.244ms 91.435ms 89.944ms
....
>>

That's the IP address for lh2.friendsofulc.org. But:

<<
# traceroute lh2.friendsofulc.org
traceroute: unknown host
>>

Following your advice, I used https://www.whatsmydns.net/ to check for propagation:

www. (as either A Name or C Name) gets green checks all down
blog. (A or C) green all the way down
lh2. (Is a DDNS sub a C, A, or Alias?) red x's all down.

The control panel on zoneedit.com shows the IP next to that sub domain. The root domain is not resolved, but two sub domains on the root have resolved with no problem for years (blog. and www.)

The updater is running fine, which it has to be to give the sub domain that IP address (ez-ipupdate on a FreeBSD server). I don't think I can fix a propagation problem? That has to be done on your end, correct?

Thanks,

Gordon
 

sandy

Administrator
Staff member
Hi there

we do have the record:

dig @ns4.zoneedit.com a lh2.friendsofulc.org

; <<>> DiG 9.6-ESV-R4-P3 <<>> @ns4.zoneedit.com a lh2.friendsofulc.org
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 63586
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;lh2.friendsofulc.org. IN A

;; ANSWER SECTION:
lh2.friendsofulc.org. 300 IN A 75.72.167.152

are you using a non standard port? at present that IP is not open on port 80.

thanks
sandy
 

482947

New Member
Hello, Sandy,

Thank you for the post, and sorry this took so long. Yes, the updater seems to be working, and yes, I close ports I'm not using at the firewall, and use other ports for services. I get the same results from dig from the command line. Traceroute, however, stops at the upstream comcast server probably because port 33434 is closed along with port 80 on the machine. But I can reach the machine using an open port, and ssh works, so it is getting through. So its working, thank you.

Gordon
 
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