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I've noticed my Synology NAS doing lots of DNS lookups for [synology service].synology.com.fritz.box. Because I had *.fritz.box DNS blocked on my Cloudflare Ze
by freitasm 2y ago
I've noticed my Synology NAS doing lots of DNS lookups for [synology service].synology.com.fritz.box.
Because I had *.fritz.box DNS blocked on my Cloudflare Zero Trust Gateway, these were returning NXDOMAIN, causing the NAS to fail during some operations (checking for software and packages updates, backups).
I've disabled the option "Apply the domain name provided by DHCP server" (Network | DNS | Advanced) and the NAS stopped these.
Now, this is a worry because that option is checked by default so how many Synology NAS could be trying to connect to these sub-domains? What if the block is removed and the new owner can actually create some of these?
More details: https://www.geekzone.co.nz/forums.asp?forumid=66&topicid=312493&page_no=2#3224750 https://www.geekzone.co.nz/forums.asp?forumid=66&topicid=312...