Zero length TCP option
advICE :Intrusions : 2000315

Summary

The intruder is trying to crash your firewall or your system by sending a zero-length TCP option.

Details

Some systems will hang when receiving such a frame.

parametric information port The TCP destination port flags The TCP flags from the offending frame. The flags are: S (SYN), F (FIN), R (RESET), P (PUSH), A (ACK), U (URGENT), 4 (low-order unused bit), 8 (high-order unused bit) options The TCP options from the offending frame. The options are displayed as "option-value", separated by commas. No-ops are not displayed

 
Version appeared: 2.1