D-Link DFL-1600 Reference Guide
2.42. TCP_FLAG
These log messages refer to the TCP_FLAG (Events concerning the TCP header flags) category.
2.42.1. tcp_flags_set (ID: 03300001)
Default Severity
Log Message
The TCP <good_flag> and <bad_flag> flags are set. Allowing
Explanation
The possible combinations for these flags are: SYN URG, SYN PSH,
SYN RST, SYN FIN and FIN URG.
SYN RST, SYN FIN and FIN URG.
Gateway Action
allow
Recommended Action
If any of these combinations should either be dropped or having the
bad flag stripped, specify this in configuration, in the "Settings" sub
system.
bad flag stripped, specify this in configuration, in the "Settings" sub
system.
Revision
1
Parameters
good_flag
bad_flag
bad_flag
Context Parameters
2.42.2. tcp_flags_set (ID: 03300002)
Default Severity
Log Message
The TCP <good_flag> and <bad_flag> flags are set. Stripping
<bad_flag> flag
<bad_flag> flag
Explanation
The possible combinations for these flags are: SYN URG, SYN PSH,
SYN RST, SYN FIN and FIN URG. Removing the "bad" flag.
SYN RST, SYN FIN and FIN URG. Removing the "bad" flag.
Gateway Action
strip_bad_flag
Recommended Action
If any of these combinations should either be dropped or ignored,
specify this in configuration, in the "Settings" sub system.
specify this in configuration, in the "Settings" sub system.
Revision
1
Parameters
good_flag
bad_flag
bad_flag
Context Parameters
2.42.3. tcp_flag_set (ID: 03300003)
Default Severity
Log Message
The TCP <bad_flag> flag is set. Ignoring
Explanation
The TCP flag is set. Ignoring.
2.42. TCP_FLAG
Chapter 2. Log Message Reference
424