Zabbix is a powerful open-source infrastructure monitoring tool capable of monitoring servers, applications, services, network […]
Setting Up the Linux Firewall IPFire
IPFire is a hardened open-source Linux firewall and router distribution for physical or virtual networks. […]
Network Bridge, Link Aggregation, and VLAN in Linux
On-prem servers must deal with challenges that cloud providers handle behind the scenes. Network Bridge […]
IPTables Cheat Sheet
IPTables uses the filter table to act as a firewall, but it also controls the […]
AAA RADIUS AAA TACACS+ on Cisco Devices
Connect your Cisco routers and switches to the AAA RADIUS server. AAA stands for Authentication, […]
SNMP and SYSLOG on Cisco Devices
Enabling SNMPv2c on a Cisco Router, for example: enable configure terminal snmp-server community PASSWORD_STRING ro […]
Port-Secutiry on Cisco Devices
Showing the current configuration before starting: do show vlan brief do show mac address-table do […]
RIPng (IPv6) on Cisco Devices
Just go the all the routers that are directly connected and in each interface enable […]
Local SPAN and Remote SPAN on Cisco Devices
SPAN (Switch Port Analyzer) mirrors one or more ports or VLANs to a destination port, […]
Spanning Tree Protocol (STP) on Cisco Devices
Types: STP Standard PVST+ (Per-VLAN STP, by Cisco) RSTP (Faster STP) Rapid PVST+ (Per-VLAN RSTP, […]