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Little Snitch is a user-friendly, software-level blocker, only – use with caution. Just FYI: LittleSnitch pre-resolves DNS entries BEFORE you click `Accept/Den
by ProllyInfamous 8mo ago
Little Snitch is a user-friendly, software-level blocker, only – use with caution.
Just FYI: LittleSnitch pre-resolves DNS entries BEFORE you click `Accept/Deny`, if you care & understand this potential security issue. Your upstream provider still knows whether you denied a query. Easily verifiable with a PiHole (&c).
I liken the comparison to disk RAIDs: a RAID is not a true backup; LittleSnitch is not a true firewall.
You need isolated hardware for true inbound/outbound protection.
- gruez 8mo ago>Just FYI: LittleSnitch pre-resolves DNS entries BEFORE you click `Accept/Deny`, if you care & understand this potential security issue. Your upstream provider still knows whether you denied a query. Easily verifiable with a PiHole (&c). This also feels like an exfil route? Are DNS queries (no tcp connect) logged/blocked?
- ProllyInfamous 8mo ago>Are DNS queries blocked? No, not with LittleSnitch (neither in/out-bound). When you see the LittleSnitch dialogue (asking to `Accept/Deny`), whatever hostname is there has already been pre-resolved by upstream DNS provider (does not matter which option you select). This software pares well with a PiHole (for easy layperson installs), but even then is insufficient for OP's attack.