(How to use the software used to make the GNS3 simulator to use the ASA firewall: After decompression, the unpack directory is placed in the root directory of the C drive. The gzip.exe in the unpack directory should be copied to the system system32 directory. Start--run--CMDunpack--formatASA8asa802.k8.bin command to extract the following two files asa802-k8.bin.unpacked.vmlinuzasa802-k8.bin.unpacked.initrdGNS3--QEMU--ASA The following settings for initrd and kernel are want these two files. The IOS file needs to be downloaded separately, the following is the address: ASA802.k8.bin?/data/157351 can only be used for 802 now, 821 is not supported)