Author: René Jorissen

René Jorissen works as Solution Architect for QMonkeys in the Netherlands. Network Infrastructures are the primary focus. René works with equipment of multiple vendors, like HPE Networks, FortiNet, SentinelOne, Phished, Holm Security, Microsoft services and many more. René is Aruba Certified Edge Expert (ACEX #26), Aruba Certified Mobility Expert (ACMX #438), Aruba Certified ClearPass Expert (ACCX #725), Aruba Certified Design Expert (ACDX #760), CCNP R&S, FCNSP and Certified Ethical Hacker (CEF) certified. You can follow René on Twitter and LinkedIn.

Configuration Example, Switching

HP Virtual Connect Manager

René Jorissen on January 23, 2012 • 0 Comments • Tags: #connect #cookbook #flex-10 #hp #manager #set #shared #sus #uplink #virtual

While change the configuration of within a HP Virtual Connect Manager I noticed that I didn’t have any options to delete server profiles, Ethernet Networks or Shared Uplink Sets within the web browser. I needed to change the configuration dramatically from an active / standby configuration to an active / active configuration. I also needed … Read More

Switching

Cisco Spanning Tree Scalability

René Jorissen on January 12, 2012 • 0 Comments • Tags: #cisco #scalability #spanning #spanning-tree #stp #tree

A colleague (Twitter: @Toonieh) mentioned spanning-tree scalability in a Cisco network. He had an article about this matter. All the credits on this post go to him. I found the article on internet and post it here to be able to find it quickly.. In a Layer 2 looped topology design, spanning tree processing instances … Read More

Configuration Example, Firewalling

McAfee Firewall – NAT mapping

René Jorissen on December 28, 2011 • 0 Comments • Tags: #arp #enterprise #firewall #mcafee #nat #proxy #redirect

While testing a McAfee Enterprise Firewall running software 8.2.0, I had some problems with the creation of a NAT mapping. The firewall is configured as standalone firewall. All (NAT / access rule) configuration on the firewall is done using Access Control Rules. McAfee uses two types of NAT mapping: NAT: mostly used to translate a … Read More

Configuration Example, Management

CactiEZ – configuration basics

René Jorissen on December 19, 2011 • 0 Comments • Tags: #cacti #netconfig #networking #ntp #sync #time

Every time I install CactiEZ or Cacti on another platform, I am searching for the commands to basically install the most common parameters, like static IP addressing, NTP sync and time zones. Several times I thought about writing a simple article with the necessary commands and final I had time to create it. Networking netconfig … Read More

Configuration Example, Wireless

AeroHive Spectrum Analysis

René Jorissen on November 3, 2011 • 0 Comments • Tags: #aerohive #analysis #hiveap #hivemanager #spectrum

One cool feature about AeroHive is the build-in Spectrum Analysis feature, which is enabled by default from HiveOS 4 and higher. Spectrum analysis is very useful to get a view of the RF environment near an access-point.  This is especially useful when troubleshooting bad connections (high volume of retransmissions) or other problems related to the … Read More

IPSec / SSL VPN, Security

Microsoft UAG – Invalid External Port bug

René Jorissen on November 2, 2011 • 4 Comments • Tags: #2010 #a #access #activated #address #be #cannot #choose #different #due #external #following #forefront #gateway #invalid #microsoft #port #sp1 #the #to #uag #unified

Last week I have installed a Microsoft UAG array. I installed Microsoft ForeFront Unified Access Gateway 2010 including Service Pack 1. When using an array configuration you have to deploy Microsoft’s Network Load Balancing (NLB) for redundancy and load balancing purposes. I configured NLB with multicast and IGMP support. I had configured some HTTPS trunks … Read More