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Tag Archives: Pix

Postfix : TLS not working outside my network

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 [...]

Posted 11 June 2008 § Cisco § Firewalling ‡ Comments (0) ° Also tagged: , , , ,

How to connect to a Cisco device using the serial port on Linux

Using the serial port is still necessary to manage some devices, when it is reseted to factory defaults. It could be also a security choice… Nowadays many computers – and especially laptops don’t have anymore a built-in serial port. Not a problem, there are many cheap serial-usb converters like this. As an alternative to the [...]

Posted 13 November 2007 § Cisco § Firewalling § Hardware § Linux ‡ Comments (3) ° Also tagged: , , , , ,

FTP configuration issues

I found that it was a real mess to set up a FTP server in a DMZ, behind a firewall Cisco Asa (501 model with IOS version 7.0). The FTP server is on the DMZ area, and therefore I natted a public IP to the private IP in the DMZ subnet of this server. Doing [...]

Posted 02 November 2007 § Cisco § Firewalling § Linux § Network § Protocols § Security ‡ Comments (4) ° Also tagged: , ,

SSH timout

After a fresh set up of your network, don’t be surprised that your ssh connections are slow.

Posted 21 April 2007 § Network § OpenBSD § System ‡ Comments (0) ° Also tagged: , , ,