Monday, February 16, 2009

Loose the ethernet when you moving Ubuntu on VMware ESX ???

Some one can confused because, when you shifting a VM or copy, rename, Vmware asks to update the UUID but when you trying to up the network device you will be seeing something like below,

"SIOCSIFADDR: No such device
eth0: ERROR while getting interface flags: No such device
SIOCSIFADDR: No such device
SIOCSIFADDR: No such device
eth0: ERROR while getting interface flags: No such device
eth0: ERROR while getting interface flags: No such device"





Cause: VMware basses the MAC address of interface on it's internal UUID.

Solution:
Edit /etc/udev/rules.d/70-persistent-net.rules and delete the additional entries if exists and enter the correct MAC address.





Do a restart and the network should be fine.

Friday, February 13, 2009

Cisco Firewall disabling TLS initiation by default

I have found my Cisco ASA 5510 is masking out STARTTLS initiation because of the SMTP packet inspection. This is enabled by default.

How to enable the firewall to start TLS on ESMTP sessions;

Option one;
policy-map type inspect esmtp esmtp_map
parameters
allow-tls [action log]
Option two;
no fixup protocol smtp 25
(fixup command is an obsolete command used in Cisco IOS version 6 and earlier, I'm having IOS 8.0(4) but fixup is working for me too)