Hi, 

I was wondering what would happen when the log received hostname matches the bad-hostname and check-hostname options. Its not written in the documentation clearly.

My use case was, i have syslog running on my server that is receiving logs from multiple servers. I have all of them into a central folder.

A pesudo config I am using would be:
source s_udp { network(ip("1.1.1.1") transport("udp") port(514)); };
destination d_servers { file("/mnt/logs/$HOST/$YEAR-$MONTH-$DAY.log"); };
log { source(s_udp); destination(d_servers); };

However, with this config i received weird stuff in the /mnt/logs folder.  

image.png

I was thinking if using both check-hostname and bad-hostname would help reduce such stuffs.

Yours Sincerely, 
Delon


On Mon, 6 May 2019 at 16:25, Delon Lee Di Lun <lee.delon2005@gmail.com> wrote:
Hi, you referring to bad_hostname or check_hostname? 

On Mon, 6 May 2019 at 15:45, Scheidler, Balázs <balazs.scheidler@oneidentity.com> wrote:
If those options match in the hostname field, syslog-ng will assume it didn't get a hostname, and shifts that value to the start of the message field, so they will be parsed into PROGRAM.

alternatively you can use the no-parse flag, fix the value and apply a syslog-parser() later.

On Mon, May 6, 2019, 03:21 Delon Lee Di Lun <lee.delon2005@gmail.com wrote:
Hi, 

Anybody used the syslog-ng options bad_hostname & check_hostname? 

How does that works? 

I have syslog-ng listening on UDP, and found that there are some gibberish logs in the folder. Was thinking if using the above two options would help reduce the gibberish. 

Yours Sincerely, 
Delon
______________________________________________________________________________
Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng
Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng
FAQ: http://www.balabit.com/wiki/syslog-ng-faq

______________________________________________________________________________
Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng
Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng
FAQ: http://www.balabit.com/wiki/syslog-ng-faq