Alias hostname cannot be resolved
I have created numerous aliases. While doing so, I made a typo. I have an alias named "alias1" containing hosts. There was an ip address with a typo "12.3456.78" which should have been "18.104.22.168". There is a recurring error in the system log "host_dns: failed looking up "12.3456.78"". My understanding is that if an alias is not able to be resolved, any rules containing that alias are not applied.
I have done the following, none of which have resolved the host_dns error being logged:
-corrected the typo and applied
-toggled each rule containing the alias and applied
-renamed "alias1" to "alias_1" and applied
I have downloaded the config file and verified that there is no occurrence of the typo. Every 5 minutes, I still see the host_dns error with the typo in the log. A am at a loss as to how I can fix this.
My guess is the system uses some kind of cache and resolves the hostname only at time X. I'm stating the obvious here, but just in case: did you try to reboot your firewall?
Rebooting was the first thing I thought of, but the last thing I want to do.
I just replicated the issue in a test environment, and rebooting certainly "fixed" it. I will have to schedule a reboot of the production box at a time when it will have minimal impact.
Unfortunately, does this imply that a reboot is required to ensure changes to aliases are fully applied?