When I run 'ipconfig /flushdns' from the web server, it reports back:
---
Windows IP Configuration
Could not flush the DNS Resolver Cache: Function failed during execution.
---
I did 'ipconfig /all' to check whether the web server has WINS proxy enabled.
It does not. It might be that the DNS servers used by web server are caching,
but the server itself does not have the 'DNS server' service enabled. The web
server is located at a data center, so it's entirely possible that the external
DNS servers have cached settings, but would that affect communications between
to services running on the same machine? That seems to be what's happening
here, because the publishing service and Coldfusion are running on the same
machine, and the problem occurs when the publishing service tries to contact CF
on the (wrong) IP address.
Dan Blickensdorfer asked what happened if I removed the server from the hosts
file and then did an nslookup for {servername}. The hosts file doesn't have an
entry for {servername}, just '127.0.0.1 localhost' and the entries I
added to correct the problem. When I do an nslookup for {servername}, it
points to the external DNS server, and then reports back:
---
C:\Documents and Settings\user>nslookup [myservername]
Server: cache01.theplanet.com
Address: 67.19.0.10
*** cache01.theplanet.com can't find [myservername]: Non-existent domain
---
Note that I'm omitting the actual name of my server in this e-mail, so
[myservername] is not the literal value I'm doing the nslookup against.
When I ping [myservername], it does report back the correct primary internal IP
address of the server (192.168.31.2).
The entries added to the hosts file force the server to look to the new
internal IP addresses assigned to the server, but when I comment out those
entries and ping again, it's resolving to the *external* ip addresses for those
sites, which might suggest that the publishing service is using the domain name
to establish the connection (it's a web service, after all) and when it has to
reach out beyond the boundaries of the server, it's going through the external
DNS server to find the domain, receives a bad response (10.0.0.x) and fails at
that point? Something like this:
With host entries in place:
Publishing service ---> www.[domain].com ---> 192.168.31.x ---> found it, good,
call CF ---> publish the record
Without the host entries in place:
Publishing service ---> www.[domain].com ---> external DNS server (67.19.0.10)
--- > www.[mydomain].com ---> 10.0.0.x ---> can't find it, bad, kablooie.
Does that seem to make any sense?
-----Original Message-----
From: Bobby Hartsfield [mailto:[email protected]]
Sent: Friday, July 01, 2011 3:12 PM
To: cf-talk
Subject: RE: Changed internal IP addresses on server - cffile breaks?
Have you flushed DNS on the two machines?
ipconfig /flushdns
.:.:.:.:.:.:.:.:.:.:.:.:.:.
Bobby Hartsfield
http://acoderslife.com
http://cf4em.com
-----Original Message-----
From: Patti, Michael [mailto:[email protected]]
Sent: Friday, July 01, 2011 11:36 AM
To: cf-talk
Subject: Changed internal IP addresses on server - cffile breaks?
I recently had to change the internal IP addresses of my Windows 2003 (32
bit) server that is running CF8 standard. The IPs were changed from a
10.0.0.x format to 192.168.31.x format.
After the change was made, CF appeared to be running fine; but I'm running
into a problem with <cffile> not writing .htm files to the file system.
When I add entries to the server's hosts file to hardcode the mapping to the
new internal IP addresses, it works fine, so somewhere in the server's
internals, some file isn't picking up on the change.
Is there anything that needs to be done in Coldfusion to register the change
of the internal IP addresses?
Thanks,
Michael
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