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IP Services Simulator

NAT / PAT: Watch the Translation Table Build

Three inside hosts, one public IP, one outside server. Send a packet and watch R1 rewrite the source on the way out, build a translation-table entry, then untranslate the reply on the way back: for PAT (overload), static NAT, and a dynamic pool. Inject the classic misconfigs and see exactly where traffic dies.

IDLEPacket State
…Inside Global (after NAT)
…Verdict
WAN · publicLAN · 10.0.0.0/24PC-A10.0.0.5insidePC-B10.0.0.6insidePC-C10.0.0.7insideR1 · NATGi0/0 ip nat insideGi0/1 ip nat outsidepublic 203.0.113.7Server8.8.8.8outside · :443
📡 Send a packet to the internet
📜 Packet path
  1. Pick a mode + source, then click Send Packet. Each hop and rewrite appears here.
📋 R1# show ip nat translations
ProInside globalInside localOutside localOutside global
, no active translations,

PAT shares one Inside Global across hosts (told apart by port). Static NAT rows have no protocol/ports and never time out.

Practice: NAT, PAT & the four terms

Score: 0 / 0

Pick the right answer, instant feedback. CCNA exam format, 4 options per question.

Question
…
Drill this into reflex

"Inside local vs inside global": until it's automatic

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