Download ASA IOS/Image for GNS3

ASA Image for GNS3:

You can run the ASA on your GNS3 by configuring the ASA IOS on GNS3. For configuration of ASA on GNS3 you need following two image files:

For configuration of ASA on Gns3 you can visit how to add ASA in Gns3 1.1 or just review the following figure.

For new version:

Where you need to perform only three steps:

  1. Type identifier name
  2. Browse the initrd file
  3.  Define the path for kernel file and click on save.


  1. Can't Start Qemu on port 10525 ?

    1. Same for me!!! Been struggling with this for days... downloaded I don't know how many images... configured everything as laid out on this here website - also did a couple of follow alongs in you tube - getting very frustrated. Using Windows 7 - and GNS3 0.8.6. Can anybody help? It's the Can't Start Qemu on port 10525 I can't get working. Gina

    2. Preferences/Qemu/General Settings.
      Verify that your directory and paths point to the actual files you will be using. When I fired this up for the first time it pointed to directories that had no files in them.
      Do a "Test Settings" to check. That fixed me up.

  2. Nothing coming up on console !!!

  3. Team ,( QEEMU (ASA1) , in this window uncompressing linux .....ok booting the kernal error------> occure

    any one help on this

  4. Replies
    1. Hey bro,how is asa working. i tried many times.its nott working.if u have nay solution please help out me.

  5. Hi Team,

    I am new to gns 3.I try to download ios for firewall but I can't able to find it.If u have the link,please share for me.

    Thanks and Regards,
    Mohamed kabeer.s

  6. it worked fine but can someone give me the password to the enable mode thanks !

    1. No password, just press the enter key after enable...

  7. But how can in gns3 0.8.6 all in one

  8. Hi while adding ASA firewall in GNS3 1.3.11, i am getting following error unable to add ASA firewall " Could not creat the QEMU disk images directory C:Program Files\GNS3\IOS\QEMU"[WinError5] Access is denied:'C:\\Programee Files\\GNS3\\IOS\QEMU' " Please help me add

    and if possible please email me:

    1. HI john wesley,am using GNS3 1.3.11 did you got any solution this.if you got it please send email on

  9. I install asa firewall image in my lappy windows 10 os while i open firewall console mode just showing only "#" if i will type anything just giving this (-ash: conf: not found) massage.

    1. <---------Read Instructions before # on the console------->

      This is your first boot, please wait about 1 min and then type the following commands:
      cd /mnt/disk0

      Please note to use the following command under ASA to save your configs:
      copy run disk0:/.private/startup-config

  10. ASA Not Running In version 1.3.13


    I start AS in Gns3 1.3.13. After it is started and while taking console, it goes through following things and then freezes:

    Linux version (kevfox@kevfox-lnx) (gcc version 4.0.2) #5 PREEMPT Mon May 7 18:35:37 EDT 2007

    BIOS-provided physical RAM map:

    BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)

    BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)

    BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)

    BIOS-e820: 0000000000100000 - 000000003ffe0000 (usable)

    BIOS-e820: 000000003ffe0000 - 0000000040000000 (reserved)

    BIOS-e820: 00000000fffc0000 - 0000000100000000 (reserved)

    607MB HIGHMEM available.

    416MB LOWMEM available.

    DMI 2.8 present.

    Allocating PCI resources starting at 50000000 (gap: 40000000:bffc0000)

    Built 1 zonelists

    Kernel command line: ide_generic.probe_mask=0x01 ide_core.chs=0.0:980,16,32 auto nousb console=ttyS0,9600 bigphysarea=65536 ide1=noprobe no-hlt

    ide_setup: ide_generic.probe_mask=0x01 -- BAD OPTION

    ide_setup: ide_core.chs=0.0:980,16,32 -- BAD OPTION

    ide_setup: ide1=noprobe

    Enabling fast FPU save and restore... done.

    Enabling unmasked SIMD FPU exception support... done.

    Initializing CPU#0

    PID hash table entries: 2048 (order: 11, 8192 bytes)

    Detected 1000.059 MHz processor.

    Using tsc for high-res timesource

    Console: colour dummy device 80x25

    Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)

    Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)

    Memory: 744744k/1048448k available (1553k kernel code, 302496k reserved, 348k data, 116k init, 622464k highmem)

    Checking if this processor honours the WP bit even in supervisor mode... Ok.

    Calibrating delay using timer specific routine.. 2000.41 BogoMIPS (lpj=4000827)

    Mount-cache hash table entries: 512

    CPU: L1 I cache: 32K, L1 D cache: 32K

    CPU: L2 cache: 4096K

    CPU: Intel QEMU Virtual CPU version 2.4.0 stepping 03

    Checking 'hlt' instruction... disabled

    SMP alternatives: switching to UP code

    Freeing SMP alternatives: 0k freed

    Unpacking initramfs...<0>Kernel panic - not syncing: bad gzip magic numbers

    Can anyone solve this please.....



    1. Kernel Image should be: asa842-vmlinuz

  11. hi
    I am having "booting the kernel" and it is not working
    Can anybody help me with this please ?

  12. ciscoasa# wr
    Building configuration...
    Cryptochecksum: 6e33e06b 255d8b92 90c27d70 9f5b4de4

    %Error copying system:/running-config (Not enough space on device)
    Error executing command

  13. Hi A quick question
    Is this free download or we have to pay to cisco for this
    Please let me know I want free software .
    Is there a way to download cisco IOS software for free without paying for the license

  14. any one tell me the link o download asa ios . im using windows10

  15. i am trying to install ASA ios in windows 10, but nothing comes up in console.
    getting error in console that connection can not establish..

  16. Hi Sir/Ma'am, can't run ASA on my GNS3 version 1.5.3.

    There's no option on the QEMU VMs to input the kernel image of the ASA. Please help. Thanks.