A new tutorial for GNS3 0.5 is available here (highly recommended for beginners).
Community
Users who are looking for help or want to report bugs can post on our forum.
A wiki is available, this is where you can post your GNS3 labs.
An IRC channel is also available on Freenode servers, named #gns3. This channel is to talk about future releases, new features etc. To get some help on your labs, go to #gns3-labs.
Contributions
You can contribute by reporting bugs (on the forum, development section), creating tutorials or giving suggestions.
We are also looking for people who can translate GNS3 into their language. A translation howto is a available here, please check for current translations on the team page.
Video tutorials- Internet LAB Tutorial Part 2
- Installation Tutorial for Linux
- How to build an Internet Lab
- GNS3 Graphical router emulation software
Switching
- Switching lab Part 2 (router on a stick)
- How to build a switching lab Part 1
Security track
- How to install and enable ASDM (PIX firewall) using GNS3
- How to configure IOS IPS (Intrusion Prevention System) using SDM in GNS3
- How to use Pemu as your personal firewall
- How to communicate with Pemu
- Pemu PIX emulator with GNS3
Voice track
- How to build a voice lab with GNS3 and VMWare
- How to use a third party SIP phone with Cisco routers using GNS3
- How to setup Call Manager Express (CME) router using GNS3
- How to configure Cisco Unified Call Manager Express GUI using GNS3
- How to configure Cisco Unified Call Manager Express (CUCME) router for XML Services
- How to register third party SIP phone to Cisco Unified Call Manager Express (CUCME)
- How to setup CME SIP trunk to VoIP SIP Service Provider Part 1
Misc.
- How to save labs with router configs
- How to build a frame-relay lab
- How to integrate a Microsoft Loopback interface with GNS3
- How to use Putty for console access
- How to use Putty Connection Manager for console access
- How to setup and install Cisco Security Device Manager (SDM) on router using GNS3
- How to setup and configure Cisco Configuration Professional (CCP)
- How to lockdown Cisco Router’s Configuration Access
- How to configure and setup IPv6 connectivity between Windows XP and Cisco Router
- How to run multi-pc topology using distributed hypervisors in GNS3