How Can I Apply FreeBSD Secuirty Advisory Patches on PfSense 2.1 ?

[drj]

I tried,  but i could't

for example:
http://www.freebsd.org/security/advisories/FreeBSD-SA-13:13.nullfs.asc

How can I do?

Can somebody help me please?

[johnpoz]

If a patch is warranted then pfsense team will install and then release an update to pfsense.

If you want to follow along with what freebsd releases - then you should be running native freebsd install and not pfsense.