Comment on Own domain for Jellyfin and privacy concerns
dingleberrylover@lemmy.world 4 weeks agoI have a cronjob that runs every minute to update the IP address. I could try to increase it to every hour or so. In the beginning I tracked how often the ISP changed the address and it was roughly like once every 24-30 hours, cannot really remember.
That does seem excessive. Change it so that it only sends an update to dyndns when it actually changes.
Having a new ip every 30 hours also seems pretty aggressive. I guess the DNS change might be slow to populate servers in that time if it is a “weird” top level domain.
Agree with the other 2 replies that hammering the dyndns server every minute is excessive and you should only send them updates when your IP address actually changes.
You should also check the TTL on the primary name server (the dyndns server) and the DNS server you use (likely your ISP’s DNS server).
https://johncireland.wordpress.com/2020/09/07/viewing-dns-record-ttl-on-windows/
The dyndns server probably has it configured right and it should have a low TTL like 5 minutes or below, but sometimes the DNS server you use can be a server that ignores TTL and caches the result for longer than expected. I don’t think this is the problem if multiple of your friends are having the same problem but it doesn’t hurt to check.
amphetaminisiert@feddit.nl 4 weeks ago
Maybe change the script to just send updates whenever the ip really changed.