Problem solve
Get help with specific problems with your technologies, process and projects.
Network Hardware
Remote access from Windows CE
Low-cost, simple VPN
MTU and GRE
How GRE can mess you up, and how to use MTU to solve the problem. Continue Reading
-
Checkpoint CCSE certification
Would CCNA be useful?
Ricoh technician looking for a career change
MSCE advice needed
Automate tripwire database update
This handy script will help you update your database quickly after making system changes.Continue Reading
Connection continually drops out
Preparing for site-to-site VPN
-
Protecting your border routers
This first article in our Weakest Link series tells what should be included in the config file for your Cisco border routers.Continue Reading
Router Expert: Automating configurations and backups with Expect
This month, Michael Martin looks at automating router configuration changes and configuration backups.Continue Reading
It's raining IT
We all know water and computers don't mix. When you don't have a choice, however, some interesting experiences can occur.Continue Reading
Hardware/software access control
'Wireline' definition
What does it mean when someone says "wireline"? Expert David Juitt explains.Continue Reading
Cost effective WAN?
Gateways vs. routers/bridges?
Use RELOAD to fix Cisco router errors
Barrie SosinskyContinue Reading
Ethernet packet collision over fiber optic?
Using Sniffer Pro Dashboard for proactive management
This tip discusses proactive network performance baselining with the Sniffer Pro protocol and network analysis tool.Continue Reading
Configuring a Windows VPN and WWW/FTP server
Problems you might encounter and how to get around them.Continue Reading
Traffic policing and shaping
Once you understand traffic flows and queuing, you can move on to managing quality of service with more advanced practices.Continue Reading
CCNA expiration date?
Equipment to study for CCNA?
How does voice travel over IP, if IP is not connection oriented?
How does VRF relate to VPN?
Explaining concurrent tunnels
Remote site survivability
Redundant IP-PBXs might not be enough if the WAN fails, here's how to keep your phones working in case of WAN failure.Continue Reading
Voice over frame relay vs. VoIP1
Cisco WAN Switching Professional Reference
This book excerpt provides you with background and an overview on Cisco and WAN switching.Continue Reading
Network Design and Case Studies
This book excerpt provides an introduction to designing campus networks, WANs, and remote connections.Continue Reading
Cisco Internetwork Design
This excerpt discusses internetwork design goals, how to identify design requirements and develop a methodology for design.Continue Reading
Top-Down Network Design
Learn about the first step of network design: analyzing your customer or company's business goals.Continue Reading
AppleTalk and Ethernet Switches
Disabling Spanning Tree for Macintosh connections helps your Ethernet switch run smoothly.Continue Reading
Fun with NICs
Things that can go wrong, and tricks to make things better.Continue Reading
Small business VPN devices
VPN client interference with VSAT
VPN for constant use?
MOM: Network management, Microsoft style
Looking to proactively monitor your network but aren't ready for a full-blown NMS? Try Microsoft Operations Manager 2000.Continue Reading
Router Expert: Using Cisco IOS logging, part 2
Our router expert configures a syslog server to accept IOS logging messages and report on potential vulnerability scans.Continue Reading
Scaling Cisco VPNs with MCS
How to use Microsift certificate services to scale a Cisco VPNContinue Reading
Security in airport wireless networks
Distributing root privileges, Part 1
Part one of a two part series on distributing root privileges.Continue Reading
Alternative encryption algorithms
Advantages and disadvantages of algorithms other than DES.Continue Reading
Multiplexing in OSI model?
Propagating static routes
How to go about it, with code snippetsHow to go about it, with code snippets.Continue Reading
Network management: Plan before you manage
Before you install a management system, research which product is right for you and clearly plan what you want to monitor.Continue Reading
ATM vs. leased line?
LAN design process?
Layer 2 switch saturation?
Reliability of leased lines?
Voice over frame relay vs VoIP?
Which WAN solution?
Router Expert: Using Cisco IOS logging, part 1
This tip examines system message logging, Unix syslog, and Cisco's IOS logging implementation and configuration.Continue Reading
VPN termination
Where should you terminate your VPN?Continue Reading
The VPN Expert: Securing PDA network access over cellular
This article examines PDA security in a traditional wireless setting: cellular data networks.Continue Reading
Using MD5 in Cisco configurations
This tip explains how to use MD5 to make your Cisco passwords more secure.Continue Reading
Intrusion detection resources
List of different books and other resources on this topic.Continue Reading
Pre-shares in hub and spoke
Setting keys in a hub-and spoke VPN.Continue Reading
Suppressing advertisements
How to quiet network broadcast advertisements on some interfaces.Continue Reading
Moving from help desk to network development
Reserve disk space
Allocating some reservewd disk space when building a new data/file server provides you with a handy buffer.Continue Reading
Low-bandwidth roaming profiles
Creating a new user environment helps solve a problem with user profiles clogging the pipes to satellite offices.Continue Reading
Weighted random early detect
How it works, what it does.Continue Reading
Home user security assessment
Network analysis: Choosing a tool
Analysis tools can help you baseline your systems and know better how to fine-tune your operating network.Continue Reading
Protocols vs. network layers?
The VPN Expert: Securing PDA access to WLANs
A close look at using IPSec to secure PDA access to 802.11b (WiFi) wireless LANs.Continue Reading
Router Expert: Configuring secure authentication on Cisco routers and switches
This article covers configuration options for secure access to Cisco routers and switches in a multi-user access environment.Continue Reading
Which cert for career path?
Firewall security risks
SMTP info management?
Value of CCNA by itself
DHCP and MAC addresses
RAS server basics
Blocking certain MAC addresses
Security issues with net topology change
Cisco training simulator
Network management: Why we need it
Find out about the major fundamentals and players in the field of network management systems.Continue Reading
Use server appliances for services
What server appliances are, and what they're good for.Continue Reading
The VPN Expert: Securing PDA enterprise network access
Advances in PDA networks and platforms are creating real demand for remote access to enterprise networks.Continue Reading
Router Expert: Building a secure TACACS+ environment
This article details the creation of a Linux-based system auditing and accounting server for Cisco TACACS networks.Continue Reading
Tunnel endpoint discovery
A way to maintain a VPN tunnel when endpoint addresses change.Continue Reading
Personalizing your enterprise: a one-to-one approach to customer interaction
Personalization technologies can help enterprises cultivate customer loyalty.Continue Reading
Phone numbers and IP addresses
Which came first: TCP/IP or OSI?
Reduce MTU for VPN connecting to ADSL
Securing the FTP service on HP-UX: Intro to the ftpaccess file
Today, HP-UX supports additional security methods.Continue Reading
Internet connection sharing
How to set up ICS in a branch office for cheap Internet connections.Continue Reading
Does Zone Alarm block hackers?
Tame the information tiger with a corporate portal
A corporate portal might be the way to go if you want to access information, applications and systems through a Web browser.Continue Reading
Can two VPN clients coexist?
Advantages of 1800MHz GSM
Access point compatibility
Wireless vs. ISDN or DSL
IP multicasting on cellular networks
Assess your network
Things to check to make sure your VoIP solution will perform as advertised.Continue Reading
Know your split-tunnel "gotchas"
The good and the bad of turning on split tunnels for your VPN.Continue Reading
Using H.323 with NAT
International FDDI network