Zabbix is an infrastructure monitoring tool. It is a powerful open-source and capable of monitoring servers, applications, services, network devices, […]
Setting Up the Linux Firewall IPFire
IPFire is a hardened open-source Linux distribution that routes and offers firewall features to a physical or virtual network. Available […]
Network Bridge, Link Aggregation, and VLAN in Linux
On-prem servers must deal with different challenges that Cloud providers magically take care of and make it look very easy. […]
IPTables Cheat Sheet
IP Tables uses the filter to act as a firewall but also controls the routing of packets on Linux. A […]
AAA RADIUS AAA TACACS+ on Cisco Devices
Connection your Cisco routers and switches to the AAA RADIUS server. AAA stands for Authentication, Authorization, and Accounting. RADIUS is […]
SNMP and SYSLOG on Cisco Devices
Enabling SNMPv2c on a Cisco Router, for example. enable configure terminal snmp-server community PASSWORD_STRING ro snmp-server community PASSWORD_STRING rw Now […]
Port-Secutiry on Cisco Devices
Showing the current configuration before starting: do show vlan brief do show mac address-table do show mac address-table int g0/1 […]
RIPng (IPv6) on Cisco Devices
Just go the all the routers that are directly connected and in each interface enable as follows making sure all […]
Local SPAN and Remote SPAN on Cisco Devices
SPAN (Switch Port Analyzer) is a functionality that mirrors one or more ports or VLANs into another port to be monitored […]
Spanning Tree Protocol (STP) on Cisco Devices
Types: STP Standard PVST+ (STP per VLAN – by Cisco) RSTP (STP faster) Rapid PVST+ (RSTP per VLAN – by […]