I just released an alpha release of a little tool that may help network administrators with a large park of Cisco routers or switches : Netios is a little tool aimed to help network administrators to administrate a large number of Cisco network devices. Providing it with a list of equipments, it connects within SSH [...]
GNS3 is configure to use Xterm by default. If you are on Gnome, you may want to use the Gnome terminal. The proper command to set is :
I got this weired message while trying to save a configuration : Looks scary at first, but normally it should be solved with a single command : I guess that there are little chances the issue remains after that, but if so, well, you may be in trouble…
I had some trouble today at office with monitoring flows going through a MLS switch. The Nfsen collector was working well for our routers, but I came to realize there were something definitely wrong with the traffic going through a Cisco 6500 switch. The traffic reported was way below the real one. After some research, [...]
This error message suddenly showed up on one of my router when I tried to save its running configuration. service compress-config allowed me to workaround this buffer problem :
There is a nice video tutorial to get your GNS3 lab connected to your physical network. However, it requires you to use a real network card with a fixed IP for doing that. This is not really handy if, llike me, you use GNS3 on a laptop whose connectivity is frequently switching between cable and [...]
GNS3 and Dynamips put together give a nice open-source and free alternative to emulate a network with IOS routers. Dynampis is an emulator of Cisco 7200 router, while GNS3 provides a nice graphical environment to design your network and use the virtual routers. I sometimes use Boson Netsim, which is not only non-free but not [...]
As I just finished setting TLS and SASL to secure the access to my Postfix server, I realized that it was working only from inside my network. What I got from my lan : I shows well that the TLS handshake is initiated. But from this outside, I just got this weired thing : Of [...]
