Endian FW does not recognize my Atheros AR8151 PCI-E Gigabit Ethernet Controller

What hardware are you building your FW with?

Intel Pentium(R) CPU G630 2.7Ghz

Linux version 2.6.32.25

The Endian FW version is 2.5.1

MotherBoard ECS H61H2-M12

Looks like your kernel is not supporting the nic, you'd have to install a driver.

Can't try/test this for you but here are some references that may help:

http://tuxthink.blogspot.nl/2010/08/enabling-atheros-ethernet-controller-on.html
http://ubuntuforums.org/showthread.php?t=1677122
http://abi71.wordpress.com/2011/12/21/enable-atheros-ethernet-card-ar8151-on-linux-slackware/

I think endian fw is based in redhat

Please post the output from lspci and indicate in your post which of the listed NICs is not recognised. Then I can look for it in my collection of Linux sources.
2.6.32.25 is a regular kernel revision (i.e. not a Red Hat kernel) but it is quite old (Oct 29 2010) so will not support cards newer than that.

The Atheros one is not been recognized

this is the pic of the lspci command
card.jpg

Your card is an Atheros AR8151 v2.0 Gigabit Ethernet. It's certainly a new card because it wasn't in my /usr/share/pci.ids dated 2011-03-12 but it was in the latest file from http://pciids.sourceforge.net/ dated 2013-01-06.

How can i upgrade my kernel to the version you suggest?

That is a whole other question really. The main thing you need to do is get the configuration of your current kernel. You then use that as the starting point when configuring the new kernel. You get the kernel in source form from ftp://ftp.kernel.org/pub/linux/kernel/ as I mentioned previously.
I posted extensively to https://www.experts-exchange.com/questions/23150517/Kernel-Rebuild-Advise.html about how to build a kernel - please take a look and post back if in doubt about anything.

The card is not recognized in older kernels. Thx