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.

Routing

ISDN Backup – still alive?

René Jorissen on May 26, 2010 • 3 Comments • Tags: #backup #eigrp #floating #isdn #ospf

Nowadays everybody wants redundancy within their network, especially when using remote sites. Customers are using multiple ISP’s for redundancy and/or configure BGP solutions. In the old days (hear me talking with my 27 years) ISDN was often used for backup purposes and I still use it sometimes as redundancy mechanism. Everybody knows that bandwidth is … Read More

Security

RSA AM 7.1SP3 Token Delivery

René Jorissen on April 28, 2010 • 0 Comments • Tags: #agent #authenticate #automatically #deliver #delivery #on-demand #rsa #token

Using two-factor authentication is common when publishing remote services to the internet with components like Citrix NetScaler or Juniper SA appliances. RSA is a well-known provider of two-factor authentication mechanism. Beginning with RSA Authentication Manager 7.1 people have the ability to use the On-Demand feature. This feature enables the delivery of token codes via SMS … Read More

Configuration Example, IPSec / SSL VPN

Citrix NetScaler: Protocol Driver Error

René Jorissen on April 20, 2010 • 1 Comment • Tags: #aaa #driver #error #ica #maxaaausers #parameter #protocol #set #ssl #sta #vpn

Today I have been troubleshooting a Citrix NetScaler configuration, where some clients received the Protocol Driver Error message when executing a published application. This error message is mostly related to a wrong configuration of the Security Ticket Authorities (STA’s). I spent a lot of time troubleshooting this issue and focused on the STA configuration. I … Read More

Quality of Service

PacketShaper Traffic Discovery and Citrix Session Reliability

René Jorissen on April 16, 2010 • 0 Comments • Tags: #citrix #data #discovery #encryption #packetshaper #reliability #session #stream #traffic

While troubleshooting some performance issues with Citrix sessions between headquarters and sub locations, I decided to take a closer look at the PacketShaper. The PacketShaper is positioned at the headquarter and does outbound shaping to the sub locations. The PacketShaper is using older software (7.2x), which isn’t necessarily a problem. I deleted the class for … Read More

Security

User expiration with RSA AM 7.1

René Jorissen on April 8, 2010 • 1 Comment • Tags: #rsa

I noticed some differences in the user expiration between RSA Authentication Manager 7.1 and RSA Authentication Manager 7.1 SP2. When assigning a token to an user in RSA AM7.1, the user automatically gets an expiration date set on its user account. The default expiration date is one year. I cannot reproduce this same symptom with … Read More

Other stuff...

The Death of CiscoBlog.com

René Jorissen on April 6, 2010 • 0 Comments

CiscoBlog.com is a website often used by myself to find useful information on network related issues. Today I read the following article on the website. Well, after 5 fun years of running CiscoBlog.com, Cisco “agents” have come. I was contacted by Cisco a couple weeks ago stating that CiscoBlog.com violates their trademark. Being that CiscoBlog.com … Read More