How to Use Yubikey with OpenPGP for SSH Key Authentication

This post is about using Yubikey with OpenPGP for SSH Key Authentication. The previous post has talked about how to generate master and subkeys with OpenPGP and copy them into Yubikey The “Authentication” subkey generated there will be used for SSH Key authentication against a Linux box. Preparation on GPG4Win Go to “Kleopatra — Settings — GnuPG System — Private Keys”, …

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How to Use Regex in Network Policy Server – for Radius Client

This post lists a simple example of using regex to match the Radius client IPs in Windows Network Policy Server (NPS) Scenario Multiple NPS Radius clients You only want NPS to execute that particular network policy for specific subnets/IP addresses. Regex in “Client IPv4 Address” Condition First, you need to create a new network policy …

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How to Encrypt/Decrypt File Using Yubikey – GPG4Win Kleopatra

This post demonstrates the procedures of encrypting and decrypting files using Yubikey; GPG4Win/Kleopatra is used in this case. This post assumes you have generated the master key and subkeys in Linux Live USB and imported those keys into Yubikey. https://ictfella.com/how-to-configure-yubikey-with-gpg-generate-and-import-keys/ Install GPG4Win and verify you Yubikey keys. Download GPG4Win from the link below and install …

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How to Fix Azure Application Gateway Server Error 502 – stale HTTP rule

This post is about fixing Azure application gateway server error 502, caused by duplicated/stale HTTP rules that referenced differently between the “Rules” session and “Backend pool” session Environment Similar to the previous post Under the “Rules” session Rule names are matched. Under the “Backend Pool” session The Fix Remove the duplicated/stale HTTP rule and create …

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Azure Application Gateway Server Error 502 – Health Probe Issue

This post is about fixing the Azure application gateway issue caused by health probe settings. Environment Azure Application Gateway Standard Tier, Medium SKU, one instance count Network setting such as VNET peering, subnets, route tables No NSG, firewall and Web Application Firewall in place The backend pool, backend settings, listeners and rules are all looking …

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