MikroTik’s NAT (Network Address Translation) is part of the connection tracking mechanism. NAT rules are applied only to the first packet of a connection. Subsequent packets belonging to the same connection are automatically handled by the connection tracking module using the same translation mappings established by that first packet.
Option Analysis:
A.✔True – NAT is evaluated only on the first packet of a new connection.
B.✘False – Subsequent packets are not re-evaluated against NAT rules.
Extract from Official MTCNA Course Material – Firewall & NAT Section:
“NAT rules apply to the first packet in a connection. After that, RouterOS uses the tracked connection entry.”
Extract from René Meneses MTCNA Study Guide – NAT & Firewall Concepts:
“Once the initial packet matches a NAT rule, connection tracking applies it to the whole session.”
Extract from MikroTik Wiki – NAT Implementation:
“NAT is evaluated on the first packet. Other packets in the same connection follow the established NAT mapping.”
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