June 2018
Intermediate to advanced
368 pages
11h 1m
English
Content preview from Managing Mission - Critical Domains and DNS
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GRE Tunnels
GRE Tunnels are similar in principle to reverse proxies in that when used in a mitigation context, they filter out hostile traffic and send the rest on to the destination nameservers. This operates at level-3, filtering and forwarding individual packets.
Where the reverse-proxy is akin to a nameserver in front of a nameserver, the GRE tunnel approach is like a firewall in front of a nameserver.
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