Joe Higgins compiled a list of important posts made by the GNS3 community, see https://gns3.com/community/discussion/a-community-diary-for-the-last-1 for details.

It is divided into three sections: Troubeshooting, Vendor specific and How-To.

Troubleshooting

SSH DOES NOT WORK ON UBUNTU VM
UNABLE TO LOGIN VIA SCP ON UBUNTU VM
The application was unable to start correctly (0xc000007b)
(Issue) SAVE PROJECT AS
Unable to locate package gns3-gui
KEYBOARD LAYOUT BORKEN IN VNC WHEN ACCESSING ASA
CURL TO REST API RETURNS NOTHING
NO NIO OPTION IN THE CLOUD APPLIANCE AFTER GNS3 2.0
NO ASAV OR DOCKER APPLIANCES ARE AVAILABLE IN PRE GNS3 1.5
QWindowsWindow::setGeometry
Line -1: Unsupported value
Cannot connect to
Client version
KVM acceleration cannot be used (/dev/kvm doesn’t exist)
unable to create NIO Ethernet for bridge
Error while setting up node: virbr0 is missing
UNABLE TO DRAG APPLIANCE INTO THE GNS3 WORKSPACE
Error while creating node: Docker has returned an error: 500
Not connected: uBridge version
EDIT->PREFERENCES->GNS3 VM IS EMPTY
unable to create NIO Ethernet for bridge
Error while setting up node
PINGS BETWEEN NODE RUN ON LOCAL SERVER FAIL WITH NODE RUN ON GNS3 VM
LINK STATUS IS UP/GREEN WHILE ITS ADMIN DOWN
Error while save settings: gns3 vm: while executing vmware command
Error while getting the list of remote images
(Jeremy) SLOW throughput when using CLOUD
Error while creating node: Docker has returned an error: 404
Error while setting up node: virbr0 is missing.
Error while getting compute list: Operation timeout
GNS3 SERVER CONNECTION LOST WHEN A PC WITH ONLY A WIFI ENABLED INTERFACES GOES DOWN
Timeout error when connecting to
Error: unable to start VM instance
Error while getting computer list: Operation timeout
Could not start the local server process
QEMU proces at 100% (AVAST)
CONSOLE CONNECTION TO DEVICE HAS ONLY A BLANK SCREEN (AVAST) (AVG)
The NPF or NPCAP service is not installed
MAC OS IPV6 BUG
Failed to open virtual machine
PROBLEM WITH IMPORTING APPLIANCES ON ESXI
GNS3 VM 100% CPU - (MALWAREBYTES) (AVAST)
api-ms-win
SLOW BOOT ON QEMU BINARY (OR ASAV BOOTLOOP) CAUSED BY ANTIVIRUS PROGRAM
vmrun.exe has stopped working
dpkg: error processing package open-vm-tools
CONSOLE CONNECTION ONLY SHOWS BLACK SCREEN
GNS3 is not installed
Could not get vmci driver version
Could not start QEMU console [Errno 111]
Docker has returned an error: 500
WinError 10049
dpkg: error processing package open-vm-tools
remote server does not support kvm
Error while getting the VMs: Cannot connect to compute ‘GNS3 VM
QEMU DEVICES RUN VERY SLOWLY
UBUNTU 18.04 64 BIT DYNAMIPS CRASH
Error while getting compute list: Operation timeout
Dynamips hypervisor process has stopped, return code: -11
GNS3 2.1.10 LINUX MINT BUG
WIN 10049
UBUNTU 14.04 NO LONGER SUPPORTED
APPLIANCE IS NOT APPEARING IN LIST OF INSTALLED APPLIANCES
CAN NOT DRAG ANY INSTALLED DEVICES INTO THE GNS3 WORKSPACE
Postman Status: 401 Unauthorized
Error while setting up node: Docker has returned an error: 500
WINERROR 10049
Cannot connect (AVG BEHAVIOR SHIELD AND RANSOME PROTECTION)
Could not find VBoxManage
This is not the correct file
Can’t start capture program [WinError 2]
no matching key exchange method found
CLOUD NOT SUPPORTED
GNS3 is not installed
Error while creating node: Docker has returned an error: 500
SOME QEMU DEVICES BOOT REALLY SLOW
Service exited with abnormal code: 1
Can’t export project: [WinError 32]
The import failed because
REMOTE SERVER WORKS ON ONE PC BUT DOES NOT WORK ON ANOTHER PC
Error while creating node: Compute ID
WIRESHARK NOT SHOWING ANY PACKET CAPTURES
Dynamips hypervisor process has stopped, return code: -11
VMwareError: vmrun has returned an error: Error: One of the parameters was invalid
-bash: telnet: command not found
Error while getting compute list: Operation timeout
Error: Could not send Dynamips command ‘vm get status’
(Jeremy) VMWARE PLAYER 15 IS NOT SUPPORTED
Error while getting compute list: Operation timeout
(Issue) VPCS “enter” is executed after the second typed character
Cannot connect to
Docker has returned an error: 500
Error while listing vms: GNS3VM: Could not list VMware VMs
Could not access KVM kernel module: Permission denied
Error: get command line isn’t supported for this type of node
WIRESHARK SHOWS NO PACKET CAPTURE
(Issue) LINK PAUSE FEATURE ONLY WORKS FOR FIRST INTERFACES FOR DOCKER APPLIANCE
No common subnet for compute
api-ms-win
Timeout error for POST (GNS3 DOCTOR LEADS TO A A FIX FOR THIS)
eth0 is not confgured
Docker has returned an error: [Errno 2]
Cannot connect to
This is not the correct file.
UNABLE TO ADD A NEW DEVICE TEMPLATE
NO VMNET INTERFACE AVAILABLE BETWEEN
(POSSIBLE) VNC MOUSE OUT OF SYNC
The NPF or NPCAP service is not installed, please install Winpcap or Npcap
Could not connect to
The remote server doesn’t support KVM
GNS3 has been previously run as root.
Docker has returned and error: 404
ALL APPLIANCES HAVE A STATUS OF MISSING FILES
KVM acceleration cannot be used ON OPENSTACK
WIRESHARK SHOWS NO PACKET CAPTURE
uBridge requires root access or the capability
Error: while creating node: Cannot connect to
Bad owner or permissions on /root/.ssh/config
THE NEW BUTTON BUG
Warning: GNS3 VM is not available
UNABLE TO SSH FROM A PHYSICAL MAC HOST TO A NODE INSIDE THE GNS3 VM
HOW TO LOAD A SAVED VPC CONFIGURATION
WinError 10061
Sorry, this is not a valid IOS image
Error while importing appliance
WINDOWS 7 MOUSE POINTER IN VNC IS NOT ALIGNED WITH THE VM’S MOUSE
Could not start QEMU console [Errno 111]
(Issue) CISCO IOU %PLATFORM-2-SIGNATURE_FAILED
LOOPBACKS DO NOT APPEAR IN CLOUD
Could not connect to 127.0.0.1 on port 3080: [Errno 111]
CISCO ASAv GNS3 VM UTILIZING 100% CPU (AVAST CAUSING CONFLICT)

Vendor specific

CISCO ASAV BOOT PROBLEM - ENDLESS REBOOT
JUNIPER 17.3 INSTALLATION
CISCO ASAV COSMETIC PROBLEM - LICENSE ERROR
CISCO XRV BOOT PROBLEM - LONG TIME TO BOOT
CISCO CSR1000V INSTALLATION
CISCO ASAV COSMET PROBLEM - ICENSE ERROR
CISCO ASAV BOOT PROBLEM - GNS3 VM UTILIZING 100% CPU
FORTISANDBOX INSTALLATION
CISCO ASAV INSTALLATION
MIKROTIK INSTALLATION
CISCO ASAV BOOT PROBLEM - ILLEGAL INSTRUCTION
CISCO NX-OSV 9000 BOOT PROBLEM
F5 INSTALLATION VIS A VIS LICENSING
CISCO IOS INSTALLATION OF .BIN FILES TO .IMAGE FILES
ENSP TOOL INTEGRATION WITH GNS3
CISCO FTDV INSTALLATION
CISCO FTDV INSTALLATION
FORTIGATE INSTALLATION
EXTREME NETWORKS EXOS INSTALLATION
EXTREME NETWORKS EXOS INSTALL
F5 INSTALLATION VIS A VIS LICENSES
CISCO WAAS INSTALLATION
PALO ALTO PANORAMA INSTALLATION
JUNIPER VSRX INSTALLATION
EXTREME NETWORKS EX-OS INSTALLATION
JUNIPER VSRX INSTALLATION
JUNIPER JUNOS INSTALLATION
CISCO ISE INSTALLATION
ALCATEL INSTALLATION VIS A VIS UUID
NOKIA INSTALLATION
CISCO ASR9K INSTALLATION
JUNIPER VQFX INSTALLATION
PALO ALTO FIREWALL INSTALLATION
ARISTA VEOS 4.20 BOOT PROBLEMS
CISCO ISE INSTALLATION
CISCO NX-OS VDC LIMITATIONS
CISCO NX-OS INSTALLATION
CISCO VIPTELA INTEGRATION WITH GNS3
ENSP INEGRATION WITH GNS3
MIKROTIK INSTALLATION
JUNIPER JUNOS INSTALLATION
CISCO IOS XRV 9000 INSTALLATION
FORTIGATE INSTALLATION
ARISTA VEOS BOOT PROBLEM - FAILS TO BOOT
JUNIPER VSRX INSTALLATION
PFSENSE BOOT PROBLEM
CISCO IOSVL2 COSMETIC PROBLEM - INTERFACES ARE ALWAYS UP
CISCO ISE INSTALLATION
CISCO ASAV INSTALLATION
CISCO ASAV INSTALLATION
CISCO ASAV INSTALLATION - AN EXPLANATION OF LINKED BASED VM
CHECKPOINT INSTALLATION
FORTIMANAGER INSTALLATION
CISCO ASAV INSTALLATION
CISCO ASAV AND WEB_JAVA FREEZES (POSSIBLE DOWNLEVEL ASDM)
CISCO ISE INSTALLATION
CISCO ASAV INSTALLATION
CISCO FTD INSTALLATION
CISCO NEXUS INSTALLATION
CISCO ASA INSTALLATION
MIKROTIK INSTALLATION
ARISTA CEOS INSTALLATION
PFSENSE INSTALLATION
CISCO ASAV INSTALLATION
F5 LTM INSTALLATION
JUNIPER VSRX INSTALLATION
CISCO NEXUS INSTALLATION

How-To

(AJ) USE WINSCP WITH THE GNS3 VM
(AJ ROBERT) BEST PEPARE FOR CCNA
(BERNHARD) CREATE DOCKER PERSISTENCE VIS A VIS ETC/HOST FILE
(BERNHARD) MODIFY QEMU MASTER COPY
(BERNHARD) CREATE VYOS VM
(AJ) REPLY TO OPEN ENDED QUESTION
RUN GNS3 OFFLINE
(POSSIBLE) LINUX UNINSTALL REINSTALL
(ANTHONY) DECIDE WHETHER OF NOT TO USE GNS3 VM ON LINUX
(AJ) UPGRADE THE GNS3 VM - AS THE GNS3 SERVER AND GNS3 VM VERSIONS MUST MATCH
(BERNHARD) DECIDE WTHER OR NOT TO ENABLE KVM ACCELERATION
(JANOS) POSSIBLE CREATE UBUNTU 16.04 BRIDGE
(BERNHARD) INJECT A STARTUP-CONFIG
(AJ) RESPOND TO OPEN ENDED QUESTION
(AJ) USE THE DUPLICATE FEATURE
(AJ) USE THE AUX CONSOLE TO GET TO BASH
(AJ) UNDERSTAND DOCKERS
(BERNHARD) FIND SUPPORTED CISCO IOS IMAGES
(JERRY POSSIBLE) IMPLEMENT GNS3 VIA WINDOWS 10 WIFI
INSTALL GNS3 VM ON ESXI
(REDNECTAR, POSSIBLE) UNDERSTAND VMWARE INTERFACES ON WINDOWS
(AJ) UNDERSTAND DOCKER PERSISTENCE AGAIN
(AJ) UNDERSTAND REMOTE VS LOCAL SERVER
(AJ) UNDERSTAND VIRTUALBOX BOUND INTERFACES AND VPCs
(AJ) UNDERSTAND REMOTE MAIN SERVER CONFUSION
(AJ) (ANDRAS) (ANDREW) HOW TO USE INKSCAPE TO MAKE GNS3 SYMBOLS
DO A GNS3 INSTALLATION ON WINDOWS 7 32 BIT
(JEREMY) UNDERSTAND THE ADVANTAGES AND DISADVANTAGES OF GNS3
(ANDRAS) SIZE YOUR HARDWARE FOR GNS3
(AJ) DETERMINE WHETHER AN IMAGE CAN BE RUN ON GNS3
(AJ) IMPLEMENT GNS3 FOR CLASS ORIENTED LEARNING
(JULIEN) UNDERSTAND HOW LINKS BETWEEN GNS3 WORKSPACE NODES WORK
(ALLAN) GET IOS IMAGES
(JULIEN) not install GNS3 via pip if you have PREVIOUSLY INSTALLED it with the packages
(MASHIE) UNDERSTAND VM UUID
CONVERT OVA TO QCOW
KEEP REMOTE SERVER RUNNING WHEN STOPPING GUI
USE A PROJECT FROM ONE PC ON AOTHER PC VIA EXPORT PROJECT
(JEREMY) DO A SILENT INSTALL, VIS A VIS WINPCAP
(AJ) EXPORT A VMWARE INSTALLED VM TO VMDK, OR QCOW2, TO RUN ON ANOTHER HYPERVISOR
(JEREMY) TELNET TO DYNAMIPS HYPERVISOR
(JEREMY) BEST LEARN CISCO SWITCHING
(AJ) DO A MANUAL DOCKER PULL
(AJ) UNDERSTAND DDOS
INTEGRATE GNS3 WITH WIRELESS ACCESS POINT
USE THE GNS3 REST API FOR HANDICAPPED STUDENTS
INSTALL GNS3 ON CENTOS 7
INSTALL TELNET ON MACOS
(ANDREW, AJ) FIND IOS IMAGES
(AJ) ADD VIRTUALBOX NICS
(TAK) SIMULATE VSS IN GNS3
(AJ) ADD MININET & POX VM TO GNS3
(AJ) CONFIGURE AN APPLIANCE SETTING VS HOW TO CONFIGURE THEE APPLIANCE SYSTEM
(MARC, ALLAN) IMPLEMENT ESXI
GET CISCO IOS IMAGES AGAIN
(AJ) UNDERSTAND HOW DOCKERS WORK
(AJ) INSTALL GNS3 ON A BARE METAL REMOTE SERVER
(POSSIBLE) DETERMINE MD5 SUM OF A FILE
DEPLOY SDN IN GNS3
(AJ) BUILD A DOCKER WITH PERSISTENCE
(JULIEN) CREATE A GNS3 BUG REPORT
ASSIGN AN IP ADDRESS TO A DOCKER CONTAINER
(JULIEN) CREATE BASE DOCKER CONTAINER
(AJ) CHOOSE WHEN TO DEPLOY A DOCKER OR A VM
(ALLAN) DEPLOY AN OVA FILE THAT IS NOT ON THE C: DRIVE
DEAL WITH PROBLEMS UPGRADING FROM GNS3 1.5.4 TO GNS3 2.1.4
(JULIEN) DECIDE WHEN TO DEPLOY A CLOUD OR NAT APPLIANCE
INCREASE RAM FOR THE GNS3 VM VIA EDIT->PREFERENCES-GNS3-RAM
(POSSIBLE) USE BOND0 INTF TO PREVENT WIFE BOUNCING
(ALLAN, MASHIE) SET UUID FOR IMAGES
(JULIEN) UNDERSTAND GNS3 ON GOOGLE CLOUD
(JEREMY) UNDERSTAND GNS3’S IMPLEMENTATION OF UBRIDGE
KEEP ESXI RUNNING WHILE SWITCHING LAPTOPS
MAKE CHANGES TO GNS3 VM RAM FIRST THEN VMWARE WORKSTATION
(ALLAN) USE REMOTE SERVERS WITH ESXI
(ALLAN) ON UPDATING GNS3 VM RAM AGAIN
INSTALL GNS3 ON WINDOWS 7 32 BIT
UNDERSTAND THE NAT CLOUD
(GARY) ON IMPORT OR CREATED PROJECT
(JULIEN) UNDERSTAND THE GNS3 REST API
(AJ) EMPLOY BEST CURRENT PRACTICE FOR NETWORKING
(FRANK POSSIBLE) EMPLOY BEST CURRENT PRACTICE TO DEPLOY GNS3 VM ON ESXI
(JEREMY, ALLAN) WHY THE GNS3 VM IS AT 14.04.1-Ubuntu
(PETE POSSIBLE) BEST SOLVE A PROBLEM IN GNS3
(ALLAN) ADD USER TO THE KVM GROUP AND USE CHMOD 755
FIND SAMPLE FREE IMAGES
(DAVID, AJ, ANDREW) GET STARTED WITH NETMIKO, PARAMIKO AND ANSIBLE
(GARY, AJ) CONNECT A LOCAL GNS3 INSTANCE TO A REMOTE SERVER GNS3 INSTANCE
(DAVID) CONNECT DEVICES RUN ON THE GNS3 VM SERVER TO PHYSICAL DEVICES VIA A USB ADAPTER
(WESSEL, POSSIBLE) DOUBLE CLICK ON GNS3 UBUNTU FULL VM TO GET CONSOLE ACCESS WITH GRUB
(AJ) BUILD GNS3 REMOTE SERVER ON AMAZON AWS
(JEREMY) SHRINK THE GNS3 VM
(AJ) INSTALL GNS3 ON UBUNTU 14.04
(JASON) NSTALLl GNS3 1.3.7 ON THE RASPBERRY PI 2
(POSSIBLE) BACKUP AND RESTORE GNS3 ENVIRONMENT TO ANOTHER COMPUTER
FIND BEST NETWORK DIAGRAMING SOFTWARE
(AJ) IMPLEMENT A GNS3 REMOTE SERVER
(AJ) DO A DOCKER MANUAL PULL
(AJ) USE APACHE BENCHMARK TO GENERATE HTTP TRAFFIC
(POSSIBLE) SAFELY UPGRADE GNS3
(AJ) CONNECT ESXI SERVER TO A PHYSICAL NETWORK
(AJ) MANAGE DEVICES WITH ANISIBLE CONTAINER
(AJ) SECURE THE GNS3 VM WITH A PASSWORD
(AJ) DO A DOCKER MANUAL PULL
(VISHAL) USE WINSCP TO UPLOAD A FILE TO THE GNS3 VM
(JHON) INSTALL GNS3 ON CENTOS 7.5 WITH IOU SUPPORT
DOWNLOAD CISCO APPLIANCES
IMPLEMENT AN ASAV MASTER TEMPLATE
INSTALL APPLIANCES ON PACKET.NET
BUILD CUSTOM DOCKER IMAGES
(AJ) USE IPERF
CONFIGURE ESXI VSWITCH
(AJ) CLONE AND BUILDING A DOCKER MANUALLY
(AJ) DEPLOY A PROJECT TO PACKET.NET
(MARC) USE GNS3 WITH GOOGLE COMPUTE ENGINE
(JULIEN) UNDERSTAND HYPER-V AND GNS3
(JULIEN ANDRAS) UNDERSTAND HYPER-V AND GNS3
SIMULATE A WIRELESS ACCESS POINT IN GNS3
(POSSIBLE AJ ALTAF) CHOOSE THE BEST PATH TO START A NETWORKING CAREER
(ANDRAS) INSTALL A DOCKER
(MARC) UNDERSTAND THE DIFFERENCE BETWEEN AWS, GOOGLE, AND AZURE
(POSSIBLE) PREVENT CONSOLE CONNECTION FROM WRAPPING AROUND
(PETE) UNDERSTAND LINUX MEMORY UTILIZATION
(PETE POSSIBLE) RUN GNS3 INSIDE A PROMOX CONTAINER
(ANDRAS) SIMULATE PSTN IN VIRTUAL LAB
(ANDRAS) INCREASE GNS3 VM DISK SPACE
(TAK) CONNECT ESXI TO A REAL NETWORK
(GERARD) USE SSHSHUTTLE ON A MAC
(AJ) CALCULATE A MD5 HAS ON EACH OPERATING SYSTEM
(MARC) DEPLOY GNS3 ON GOOGLE CLOUD
(JEREMY) CONVERT PRE-1.5 (.NET) FILES to 2.1+
(POSSIBLE ALBERTO ) BACKUP AND RESTORE PROJECTS ON PACKET.NET
(JEREMY) PROPERLY CONNECT A GNS3 CLOUD APPLIANCE ON ESXI
(JEREMY) UNDERSTAND HOW PORTS ARE ASSIGNED TO A NODE’S CONSOLE
TRANSFER FILES TO GNS3 VM
(LEE) USE LEE’S NEW DOCKER IMAGES
(BERNHARD) UNDERSTAND A COMPUTE NODE AND THE GNS3 REST API
RUN GNS3 OFFLINE FROM A NETWORK VIA 127.0.0.1
REPLY TO USERS WANTING TO USE IMAGES THAT IS DESIGNED TO ONLY RUN ON HARDWARE
(JULIEN) AVOID PROBLEMS WITH ADMINISTRATIVE MODE IN GNS3 2.0+
(JEREMY) INDERSTAND THE COMMAND UBRIDGE –VERSOIN
IMPLEMENT BEST PRACTICES ON A GNS3 UPGRADE OR DOWNGRADE
(JULIEN) WHY THE INTERNET APPLIANCE IS NOT IN THE MARKETPLACE ANYMORE
SECURE GNS3 FROM OUTSIDE CONNECTIONS GNS3 SERVER AUTHENTICATION
MODIFY THE GNS3 VM RAM CAPABILITIES
UNDERSTAND HOW DYNAMIC TELNET PORTS ARE ASSIGNED
PROPERLY EXPLAIN A PROBLEM WHEN YOU CREATE A POST
UNDERSTAND ESXI AND GNS3 VM INTERACTION
CHOOSE PROPER HARDWARE TO RUN GNS3
SIMULATE A WIRELESS ACCESS POINT
UNDERSTAND DIFFERENCES BETWEEN GNS CLOUD AND GNS3 NAT
(ANDRAS) CREATE MULTIPLE VPN TUNNES WITH DIFFERENT CLOUD PROVIDERS
UNDERSTAND THE GNS3 ETHERSWITCH
(ANDRAS) PROPERLY MANAGE GNS3 APPLIANCES
(ANDREW) ON HIS ALPINE AND BERNHARD ON HIS DOCKER TACACS
DOWNLOAD VMWARE WORKSTATION PLAYER 12 LINK
(ANDRAS) UNDERSTAND WHAT GNS3 IS
(ALTAF POSSIBLE) INSTALL WIRESHARK SEPARATELY
(ANDRAS) TROUBLESHOOT ON A MALFUNCTIONING DOCKER
(BREZULAR, NON-GNS3 RELATED) IMPLEMENT A HOME NETWORK WITH LEDE AND RASPBERRY PI
(MARC POSSIBLE) CLOUD ETH3 CONNECTED TO ETHERSWITCH PORT IN TRUNK
(AJ, GARY) DO A PING WITH A VPC
(BERNHARD) PROVIDE PERSISTENSE TO A DOCKER /ETC/HOSTS FILE
(MASHIE) ACCESS A PROJECT FROM 2 LOCATIONS