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.

Firewalling

Cisco ASA NPE image

René Jorissen on January 4, 2011 • 1 Comment • Tags: #asa #cisco #encryption #no #npe #payload

I got complains from a customer who wasn’t able to configure 3DES or AES encryption for a VPN tunnel. Sounds familiar with a problem I had a couple of weeks ago. So I gave the customer the advice to upgrade and activate the VPN-3DES-AES feature. He tried but that didn’t solve this problem. I remotely … Read More

Other stuff...

XenServer and Multicast with IGMP support

René Jorissen on December 20, 2010 • 3 Comments • Tags: #igmp #multicast #support #xenserver

Today I tried to add a virtual Terminal Server within a XenServer to a NLB cluster. The current NLB cluster contained only physical servers. When adding the virtual server to the NLB cluster with the NLB manager, the server lost all IP communication. It isn’t possible to connect to or from the server. Together with … Read More

Management, Switching

Upgrading Cisco switch stack

René Jorissen on December 15, 2010 • 0 Comments • Tags: #allow-feature-upgrade #archive #download-sw #ftp #imageonly #overwrite #stack #switch

I always upgrade a switch stack with one single command. Last week I received a call from a customer with the question about the upgrade procedure for a switch stack. The customer wanted to upload the image separately to every single switch. I told him that he could upgrade all switches at once. Since I … Read More

Switching

Cisco stack: version mismatch

René Jorissen on December 15, 2010 • 5 Comments • Tags: #archive #cisco #copy-sw #mismatch #stack #version

When adding a new switch to an existing stack, the new switch should have the same software image as the existing stack member switches. If the new switch has different software, the switch isn’t capable of joining the stack. Switch/Stack Mac Address : 588d.0918.3100 H/W   Current Switch#  Role   Mac Address     Priority Version  State ———————————————————- *1       … Read More

Management

Cisco ASA: web interface not working

René Jorissen on December 14, 2010 • 24 Comments • Tags: #113 #algorithms #common #encryption #error #net::err_ssl_version_or_cipher_mismatch #no #ssl

I had to troubleshoot a Cisco ASA today, where the client wasn’t able to connect to the management web interface anymore via https. The customer didn’t install ASDM locally, but always starts the Java-based version. After upgrading the Cisco ASA to software version 8.2(1) and a reboot, the client wasn’t able to connect to the … Read More

Other stuff...

Cisco Connect – Software Download Entitlement Controls

René Jorissen on December 13, 2010 • 1 Comment • Tags: #cco #cisco #connect #download #software

I read about it on the internet and last week I received the “official” mail from the Cisco Partner Channel about the changes regarding the Software Download Centre Entitlement Controls. The e-mail (in Dutch) can be found below. I have different feelings about the changes regarding the software entitlements. It isn’t possible anymore to just … Read More