Firewall (UTM) [Cisco Firepower(ASA)] How to deal with Smart Licensing [Offline/PLR]
Operation confirmation environmentFirepower 2100 seriesASA OS 9.16.xSmart Licensing Support in FirepowerFirepower also r...
Firewall (UTM) 
Firewall (UTM) [FortiGate] Checking the operation of firmware upgrade in HA configuration
How to perform an upgrade in HAThe Admin Guide for firmware upgrades in FortiGate HA configurations states:You can upgra...
Router [Cisco] Points to check when static routes are not added even if add-route is set in NAT
Operation confirmation environmentC891FJ-K9Version 15.8(3)M9"add-route" option in NATIf you specify the add-route option...
Firewall (UTM) [FortiGate] How to configure IPsec VPN (ver. 7.2.3)
Work environmentFortiGate-60Eversion 7.2.3Steps to configure IPsec VPNHere, consider configuring IPsec VPN in the follow...
Firewall (UTM) [Cisco] Telnet/SSH management access settings and notes on Firepower (ASA)
Operation confirmation environmentFirepower 2100 seriesASA OS 9.16.xConfiguration for Telnet access on Firepower(ASA)Con...
Switch [Cisco Nexus 9000] About redistribution configuration to OSPF/EIGRP
Work environmentNexsus 9300vNXOS: version 9.3(10)Redistribution configuration into OSPFTo configure redistribution to OS...
Firewall (UTM) [Cisco] Firepower(ASA) Configuration Tips
InterfaceLoopback Interface cannot be configured on ASA.FailoverIf you use one interface as Failover link and Stateful f...
Router [Cisco ASR 1002-X] How to configure static link aggregation
Consider setting static link aggregation (mode on) on your ASR 1002-X. Now if you check the options with the "channel-gr...
Switch [Cisco] Cause of starting with empty config after reboot [Catalyst 9000]
Target environmentCatalyst 9000 series switchesSymptomsEven though the startup-config is saved, the device starts up wit...
Router [Cisco] How to configure NAT [Full commentary]
Operating environmentC891FJ-K9 Version 15.8(3)M9Basic knowledge of NATInside and outside interfacesWhen configuring NAT,...