Here are some useful grep comands for getting through syslog.
cat or zcat if compressed.
| grep what_you_are_looking_for
| grep -v what_you_are_not_looking_for
| head -n 10 looks at first 10 lines
| tail -n 10 looks at the last 10 lines
Example:
$ cat 11.16.25.99.log | grep 12.16.299.61 | grep -v UDP | tail -n 1
Nov 30 23:15:48 172.16.254.73 %ASA-6-303013: Teardown TCP connection 381431635 for OUTSIDE:12.16.299.61/57827 to INSIDE:10.99.219.35/8721 duration 11:25:52 bytes 92483 Connection timeout