It is possible to log some of the loggs into the PIX Firewall logging buffer (limited amount of data) or send it to a syslog server (unlimited).
commands:
# Enable logging
logg on
# Logg ing local on PIX:
logg buffer info
# For a syslog server:
logg trap info
logging host in_if_name ip_address
#Access-list logging example:
access-list outside-acl permit tcp any host 1.1.1.1 eq smtp log info interval 600
access-list outside-acl deny ip any any log 2
access-group outside-acl in interface outside
See also Using Syslog:
http://www.cisco.com/en/US/products/sw/secursw/ps2120/products_configuration_guide_chapter09186a0080172797.html#wp1119533
Free Syslog server software:
http://www.kiwisyslog.com/
http://support.3com.com/software/utilities_for_windows_32_bit.htm
sincerely
Patrick