How to increase syslog or filter log size

[trunglam]

Any body can help me to increase or change the default size of syslog or filter log. I need to save filter log everyday

Thanks in advance.

[jimp]

If you need to save the log, you must redirect the logs to an external syslog server.

Even if you increase the log sizes, there is no guarantee you will save an entire day's worth of entries, especially if you endure a lot of port scans or other random traffic on the WAN.