Alias -> Host -> FQDN - How many IPs rsolved? Minicron?

[Nachtfalke]

Hi,

I have some questions about resolving FQDN to IP-Addresses to use into a firewall rule.

• How many IPs will be resolved for one FQDN - is there a limit?

• I set 600s interval to resolve IP addresses but I did not found any cron job for that and not a minicron job which does that. I am not sure if pfsense really resolves the IPs. So where can I look if it works?

I have a suggestion for newer pfsense versions:
Add a possibility on how loang "old" resolves of an FQDN should be stored in the alias table untl deletion. So letzt say pfsense resolves every 300s the FQDN and gets always different IPs back. Then I would say it could make sense to say keep the IPs resolved within the last 24h for this FQDN. I assume that at the moment pfsense resolves an IP, places this IP into an alias and when the next time the resolve starts it deletes the old IP.

Thank you for your response.

[jimp]

@Nachtfalke:

• How many IPs will be resolved for one FQDN - is there a limit?

There is no limit that I am aware of.

@Nachtfalke:

• I set 600s interval to resolve IP addresses but I did not found any cron job for that and not a minicron job which does that. I am not sure if pfsense really resolves the IPs. So where can I look if it works?

The filterdns daemon keeps its own timer for that since it is always running. It's the "-i" parameter to filterdns.

Jim