Hands-on experience in networks, servers and business communications.
When your internet or connectivity service is delivered over an L2TP connection, the MikroTik router can be the L2TP client itself so the whole network uses it. See how to create the L2TP client, routes, NAT, MSS clamping and troubleshooting.
· 4 min read
Backup vs export on MikroTik, how to take and restore both, automatic daily backups with the scheduler and keeping copies safe. Commands included.
· 4 min read
Forgot your Cisco switch password, or inherited a switch whose password nobody knows? This article walks through password recovery on Catalyst switches step by step, without losing the configuration or the VLANs.
· 4 min read
A switch running on default settings is an open door into your network. This article gives a practical hardening checklist for Cisco switches with ready-to-use commands, from passwords and ports to Port Security, DHCP Snooping and BPDU Guard.
· 5 min read
VLANs split the network into separate segments, and VTP carries the VLAN definitions from one central switch to the rest. Learn how to create VLANs, access and trunk ports, set up a VTP server and clients, and avoid the dangerous revision number trap.
· 4 min read
There are three ways to manage a Cisco switch: the console cable, Telnet and SSH. This article sets up all three step by step, from the management address and console password to SSH version 2, restricting access and closing Telnet.
· 4 min read
When you are away from your desk, Follow Me routes calls to your extension on to your mobile or other extensions. Learn what it is for, how to set it up step by step and the most common mistakes in Issabel.
· 4 min read
With a Ring Group, several extensions share one number and the call reaches whoever is free. Learn the ring strategies, a step-by-step set-up and how it differs from a queue.
· 4 min read
DISA lets you call the phone system from outside, enter a PIN and dial like an internal extension. Read the step-by-step set-up and, more importantly, the security points of DISA in Issabel.
· 4 min read
With an IAX2 trunk between two Issabel servers, extensions at head office and the branch talk to each other for free, as if on one phone system. See both sides of the set-up, the routes, the firewall and troubleshooting step by step.
· 4 min read
A callback system lets you call the phone system and hang up; Issabel calls you back on the company line. How to set up Callback in Issabel, combine it with DISA and keep it secure.
· 4 min read