Monday, August 20, 2012

ipSpace.net: Fix router configuration after a reload

ipSpace.net: Fix router configuration after a reload: Sometimes, parts of router configuration get lost during the reload process: although the configuration commands are saved in NVRAM, they ar...

Thursday, August 2, 2012

ASA 8.4

1. Download archive from here.
2. Download AIO version of GNS3 for Windows (Qemu should be patched or it won't start with asa's connected interfaces). My version was 0.8.3.
3. Configure Qemu in GNS3 with following settings:
Qemu Options: -vnc none -vga none -m 1024 -icount auto -hdachs 980,16,32
Kernel cmd line: -append ide_generic.probe_mask=0x01 ide_core.chs=0.0:980,16,32 auto nousb console=ttyS0,9600 bigphysarea=65536
4. Configure the paths to image.
5. The hardest part - start you lab and enjoy :)

Tuesday, July 31, 2012

Direction on the access-lists on the VLAN interfaces


An access-list applied outbound to a vlan interface filters traffic going TO machines on that vlan.

An access-list applied inbound to a vlan filters traffic coming FROM machines on that vlan.

Thursday, May 3, 2012

How to save Cisco routers' crypto keys in GNS3

One annoying thing in GNS3 is that sometimes after you configured SSH in your routers it stops working after reload. The problem is the key isn't stored in NVRAM, so after reboot, I have to regenerate them every time.
 There is a workaround of this problem - open .net file of the GNS3 project and delete
"cnfg="
lines from the routers configuration. It should solve the problem permanently.
Happy routing :)