Thank you for your response, I just found that there's likely a more elegant 
solution that requires less configuration. 
There's an AWS config file that allows the dhcp EC2 instances to "preserve 
hostname". 
I'll try that before I try to tackle the template approach. I can provide a 
link to that AWS guidance if anyone happens to be interested.Thanks again David.




   On Wednesday, March 23, 2022, 03:44:14 PM EDT, David Lang <da...@lang.hm> 
wrote:  
 
 create a template that has whatever text you want in the hostname field and 
then 
use that when sending a message

on the receiving side (the relay), you can look at fromhost-ip or fromhost and 
then use that in a template while relaying it

David Lang

On Wed, 23 Mar 2022, Chris via rsyslog wrote:

> Date: Wed, 23 Mar 2022 18:08:10 +0000 (UTC)
> From: Chris via rsyslog <rsyslog@lists.adiscon.com>
> To: "rsyslog@lists.adiscon.com" <rsyslog@lists.adiscon.com>
> Cc: Chris <uni8...@yahoo.com>
> Subject: [rsyslog] Controlling Hostname
> 
> I have several Linux instances in an Amazon VPC. They send UDP 514 to a 
> singular free tier ubuntu server running rsyslog. 
> It aggregates all incoming messages and sends them over TLS to a primary log 
> server running mysql and Loganalyzer on it. 
> Amazon makes controlling the hostname necessary because most hostnames look 
> something like ip-10-0-99-199. 
> I was thinking maybe there was a way I could force the host that is 
> originating a syslog message send it's message as an "IP address" versus the 
> hostname. 
> If that were true, I could likely set any name I wanted in the /etc/hosts on 
> the primary server and then primary server could just resolve the hostname on 
> the primary server. Is that possible? If so how would I accomplish that?
> Thanks in advance,CB
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