My Network Security Journal
Sharing my learning and personal experience in IT Network Security.
Sunday, August 3, 2025
Cisco ASA Firewall Global ACL
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Refer to this link regarding the Global ACL in a Cisco ASA firewall and below are some its caveats. Global access policies are networ...
Wednesday, July 2, 2025
Factory Reset a Cisco ASA Firewall in Mutiple Context
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To factory reset a Cisco ASA firewall in Multiple context mode, you'll need to issue a "write erase" then "reload" u...
Thursday, June 5, 2025
Hardening a FortiGate Firewall using Copilot AI
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I used the Microsoft Copilot AI tool to help generate a list or steps in "hardening" a FortiGate firewall. Below are the results ...
Saturday, May 3, 2025
Enable Overlap IP Address in a FortiGate VDOM
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Here's a Fortinet link to enable an overlap IP address in a FortiGate VDOM. I've subnetted a public IP address range and allocated ...
Sunday, April 6, 2025
Configure Cisco Router Crypto Map Based IKEv2
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I had to reconfigure an old Cisco 800 router from a "legacy" Crypto Map (Policy Based) IKE Version 1 to a more secure IKE Version ...
Sunday, March 2, 2025
Change the VLAN ID in a FortiGate Interface
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Here's a Fortinet technical guide in changing the interface VLAN ID in a FortiGate firewall. I tried changing the VLAN ID (565 > 555...
Tuesday, February 4, 2025
Create a Custom ICMP Service in a FortiGate Firewall
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I had to configure a firewall policy in a FortiGate firewall and wanted to restrict the ICMP or ping service since the default type is ANY ...
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