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highlights and lowlights of the daily business of network engineers

highlights and lowlights of the daily business of network engineers
  • /Samuel
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Category: NAT

When IPsec Suddenly Becomes One-Way Behind CGNAT

04.09.2026 Samuel Heinrich

When IPsec Suddenly Becomes One-Way Behind CGNAT We recently ran into an interesting IPsec issue across three branch sites. Each branch used the same basic design: FortiGate firewall at the branch Teltonika 5G router in front of the FortiGate NAT… Read moreWhen IPsec Suddenly Becomes One-Way Behind CGNAT

Fortigate, NAT, vpn  esp, fortigate, nat-t, troubleshoot, vpn  Leave a comment

Firewall 1×1: Full NAT ( Source and Destination)

27.11.201426.04.2015 Samuel Heinrich

Full NAT (Source and Destination)   Wann kommt FullNAT zum Einsatz? FullNAT kommt dann zum Einsatz, wenn beim passieren eines IP Paket durch ein NAT Device (hier im Beispiel eine Firewall) die Source und Destination im IP Header so verändert werden soll, dass das… Read moreFirewall 1×1: Full NAT ( Source and Destination)

NAT, security, sophos  fullnat, iptables  Leave a comment

Printserver NAT Problem

15.02.201401.03.2015 Samuel Heinrich

Diese Woche ein Problem tshooten dürfen, wo es um einen Client ging, der einen Printer nicht mehr einmappen konnte, welcher über ein statisches NAT erreichbar ist. Der Client befindet sich im Netz 192.168.100.0/24Der Printserver, der den Printer zur Verfügung stellt,… Read morePrintserver NAT Problem

NAT, wireshark  printeserver, troubleshoot  Leave a comment

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Letzte Beiträge

  • When IPsec Suddenly Becomes One-Way Behind CGNAT
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  • Huawei AirEngine WLC HA with HSB: Keeping Active/Standby Simple
  • Cisco 9800: Wrong Boot Variable After Upgrade to 17.12.6a
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