outline 係system-wide VPN, 保護範圍係唔只browser既traffic
PS. outline自己聲稱
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Handling UDP traffic
Outline is able to operate as a system-wide VPN, meaning that all UDP traffic is tunneled through the Outline server.
DNS traffic
Outline performs all DNS lookups through the Outline server, and protects them using the same encryption that’s used for all other network activity. Your DNS queries will go through the Outline server to the Dyn Internet Guide or OpenDNS.