Firewall (UTM) [Cisco Firepower(ASA)] How to deal with Smart Licensing [Offline/PLR]
Operation confirmation environment
Firepower 2100 series
ASA OS 9.16.x
Smart Licensing Support in Firepower
...
Firewall (UTM) 
Firewall (UTM) [FortiGate] Checking the operation of firmware upgrade in HA configuration
How to perform an upgrade in HA
The Admin Guide for firmware upgrades in FortiGate HA configurations states:
Yo...
Router [Cisco] Points to check when static routes are not added even if add-route is set in NAT
Operation confirmation environment
C891FJ-K9
Version 15.8(3)M9
"add-route" option in NAT
If you specify t...
Firewall (UTM) [FortiGate] How to configure IPsec VPN (ver. 7.2.3)
Work environment
FortiGate-60E
version 7.2.3
Steps to configure IPsec VPN
Here, consider configuring IPse...
Firewall (UTM) [Cisco] Telnet/SSH management access settings and notes on Firepower (ASA)
Operation confirmation environment
Firepower 2100 series
ASA OS 9.16.x
Configuration for Telnet access on Fi...
Switch [Cisco Nexus 9000] About redistribution configuration to OSPF/EIGRP
Work environment
Nexsus 9300v
NXOS: version 9.3(10)
Redistribution configuration into OSPF
To configure r...
Firewall (UTM) [Cisco] Firepower(ASA) Configuration Tips
Interface
Loopback Interface cannot be configured on ASA.
Failover
If you use one interface as Fail...
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-g...
Switch [Cisco] Cause of starting with empty config after reboot [Catalyst 9000]
Target environment
Catalyst 9000 series switches
Symptoms
Even though the startup-config is saved, the devi...
Router [Cisco] How to configure NAT [Full commentary]
Operating environment
C891FJ-K9 Version 15.8(3)M9
Basic knowledge of NAT
Inside and outside interfaces
When...