Articles with the tag: #cisco

Testing for Cisco security vulnerabilities with Ansible

In this blog post I'm demonstrating how to test for Cisco security vulnerabilities with Ansible.

NetFlow with Elastic-Stack

This blog post shows how to setup a NetFlow collector with Elastic-Stack, Fleet and Elastic-Agent. NetFlow data is sent by a Cisco ASA Firewall cluster.

Cisco Wireless Intrusion Detection Events to Elastic-Stack

In this blog post I'm showing how to get Wireless Intrusion Detection Events from Cisco's WIDS included in Cisco's Wireless Controllers into an Elastic-Stack.

802.1X Switch port is amber when only IP Phone is connected

When 802.1X (wired) is configured on a 3750G switch, the port LED is amber when only an IP Phone is connected (mab). When connecting on the IP Phone a downstream device like a laptop (dot1x), the port LED goes to green.

Login-Block (DoS and Dict-Attack Protection) in Cisco IOS

Cisco offers a method to protect against DoS (Denial-of-Service) and Dictionary attacks for IOS devices called Login-Block.

Synology DiskStation to Cisco Core Switch redundant setup with LACP

Configuration of LCAP (Link Aggregation Control Protocol) for Synology DiskStation and Cisco Switch.

Cisco SSM On-Prem Upgrade procedure

This is another blog post for Cisco SSM On-Prem server where I'm showing the upgrade process.

Cisco ISE admin password lifecycle and reset

Quick notes about Cisco Identity Services Engine password lifetime and admin password reset.

Cisco SSM On-Prem password recovery procedure

For a Cisco Smart Software Manager Test Drive installation I used the older version 8-202010 and I wanted to perform an upgrade to the latest version 8-202108. And of course it is a test drive, I did not save or wrote down the password :). In this document I'm describing how to perform a password recovery for a Cisco SSM On-Prem installation.

Troubleshooting SFP transceivers and Packet captures

In an older blog post I was writing about "Useful Cisco Commands for Troubleshooting cable problems". In this blog post I'm showing an additional, useful commands for Fiber Optics troubleshooting and packet capturing on Cisco switches.

Cisco WLC - No secured WebUI after failover switching

Cisco WLC 3504 secured WebUI is not working on Secondary Unit in a failover (SSO) setup. When switched back to the Primary Unit, the secured WebUI is working again. Troubleshooting and solution of this strange behavior.

Integration of Nextbox UI Topology Viewer in Netbox

In this blog post I'm showing how to integrate NextBox UI Plugin into my Netbox installation. NextBox UI Plugin is a topology visualization plugin which is based on Cisco's neXt toolkit.

WiFicalypse 2021

WiFicalypse 2021, FragAttacks. Design and Implementation flaws in WiFi.

Check in of configuration files to a Gitlab server

This is the third part of a series of blog posts about Cisco configuration backup with Netbox and Gitlab. This blog post covers the check in of configuration files to a Gitlab server

Low Level Device functions for backup with Netbox and Gitlab

This is the second part of a series of blog posts about Cisco configuration backup with Netbox and Gitlab. This blog post covers the low level functions to connect to network devices with pexpect.

Cisco configuration backup with Netbox and Gitlab

This is the first part of a series of blog posts about Cisco configuration backup with Netbox and Gitlab. It covers the connection to the Netbox API and to get the data of network devices with the pynetbox filter function.

Fritzbox on redundant ASA Firewall

Setup of two redundant Cisco ASA firewalls on a Fritzbox cable modem with Non-routed transfer network to keep the "PC-MAC"/"exposed host" configuration on Fritzbox during ASA failover switching

Cisco Smart Software Manager Test Drive

Cisco Smart Software Manager (SSM) On-Prem Test Drive installation, Virtual Machine setup and first steps in the Web UI

Learning material for network automation

Learning material for network automation with books, videos, podcasts, courses and API, libraries and tools

Why 2.4 GHz WiFi is bad

Cisco CleanAir quality report for 2.4GHz WiFi in my area

Useful Cisco Commands for Troubleshooting cable problems

Useful Cisco Commands for Troubleshooting problematic cabling (Cat.x and Fiber optics).

Cisco Live 2020 Barcelona

Cisco Live 2020 Barcelona, Day #1 - A cat and mouse Game, Day #2 - Attack Kill Chain and Packet Capturing, Day #3 - About Garlic and Onions and Industrial automation, Day #4 - Catalyst 9000 Access Switching Architecture and Resolving Network Faults Faster through Automating Entire Fault Management, Day #5 - SD-WAN, deployment strategies, managing and monitoring

Replacing faulty memory for Cisco ASA-5520

Replacing faulty memory for Cisco ASA-5520, checking memory and failover

Cisco ASA5520 stuck at Booting system, please wait…

Cisco ASA5520 stuck at Booting system, please wait... and how to check for faulty memory

Convert Cisco lightweight AP to standalone AP

The procedure how to convert a Cisco lightweight AP to a standalone AP

Cisco Unified IP Phone 7975G with Sipgate

Cisco Unified IP Phone 7975G with Sipgate, from configuring switches, setting up DHCP and TFTP, and do the correct SEPMAC.cnf.xml file configuration and firewall ACL.

Connecting to Cisco console with Linux

Connecting to Cisco console with Linux

Creating ROOT-CA-based certificates for Cisco Wireless Controller

Creating ROOT-CA-based certificates for Cisco Wireless Controller

Blocking Facebooks networks on ASA firewall

Blocking Facebooks networks on ASA firewall

Setting up Cisco 3504 series wireless controller redundancy

Setting up Cisco 3504 series wireless controller redundancy

Setting up administrative RADIUS logins on AIR-AP2800 with Mobility Express

Setting up administrative RADIUS logins on AIR-AP2800 with Mobility Express

Activate CLI Commands on Lightweight AP

A Trick to activate CLI Commands on Cisco Lightweight AP

Saveconfig Backup scripts

saveconfig, two scripts to backup configuration files from network devices

Create ASA Firewall rule from Talos IP Blacklist

A simple bash script to create ASA Firewall rules from Talos IP Blacklist

WiFi Spectrum Analysis

WiFi Spectrum Analysis with Cisco 3600 Series AP and Outdoor antenna

Convert Cisco 2600 Series Access Point

Short instructions how to convert a Cisco 2600 Series Access Point

Common Cisco switch port errors

Overview of common Cisco switch port errors and causes

Secure Cisco console with AAA

How to secure the Cisco console with AAA

New Cisco switch for my network

New Cisco switch for my network: WS-C3750G-24TS-S1U

Move SSH port on Cisco devices

How to move SSH port on Cisco devices to another port than TCP/22