Received a number of help on resetting the HP Jetdirect (JD afterward) to factory defaults, but could not tell me why the IP address was not defaulting to that in the manual(s). So, hopefully, the following may help. So if you have an unknown HP JetDirect EX Plus J2591A, the first thing is to change Read More
Category: Networks
Networks, Routers, Firewalls, Moderns and the likes
How to Fix “SSL Negotiation With License Manager Server Has Failed” on an Old SonicWALL Device
DESCRIPTION: Older firmware versions are not able to contact to the new HTTPS License server due to an updated certificate on our backend.The new certificate is a 2048 bit certificate and uses a secure Verisign certificate. (new IP 204.212.170.143) RESOLUTION: Resolution A Upgrade at least to the latest General Release (i.e. 6.2.5.3, 6.2.7.1, 5.9.1.7) Resolution B (workaround) in Read More
100M Full-Duplex vs Auto-Negotiate.
Problem descriptions: I have a system running on an Intel pro VE running 100mbps full-duplex. The default option is auto-negotiate but I explicitly set it to 100mbp full-duplex. I’m behind a router. Interestingly, my internet connection starts giving problems: connection timeouts; page not loading; extreme ping times, etc etc etc Yet another system’s Internet connection Read More
What’s The Difference – VPN IPSEC Tunnel Mode and Transport Mode
IPSec’s protocol objective is to provide security services for IP packets such as encrypting sensitive data, authentication, protection against replay and data confidentiality. As outlined in our IPSec protocol article, Encapsulating Security Payload (ESP) and Authentication Header (AH) is the two IPSec security protocols used to provide these security services. Analyzing the ESP and AH protocols Read More
Understanding Spanning Tree Protocols – STP, RSTP, MSTP
In brief, the differences between Spanning Tree Protocol (STP), Rapid Spanning Tree Protocol (RSTP), and Multiple Spanning Tree Protocol (MSTP) are as follows: STP: only supports a single instance. RSTP: supports fast convergence and a single instance. MSTP: includes the advantages of RSTP, and supports multiple instances. STP is the short form for Spanning Tree Read More
How to Enable Cloudflare Content Delivery Network (CDN) for Free and no Plug-in required
By: Brad Litwin Here’s how to set up Cloudflare for your website in three steps: Create a Cloudflare account and add your site. Update your domain name servers and choose a plan. Review your Cloudflare security settings. See below for detail. No one likes a slow website – that much is obvious. The problem is Read More