Table 116 packet filter logs table 117 icmp logs – ZyXEL Communications P-334WHD User Manual
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P-334WHD User’s Guide
Appendix G Log Descriptions
263
Table 116 Packet Filter Logs
LOG MESSAGE
DESCRIPTION
[TCP | UDP | ICMP | IGMP |
Generic] packet filter
matched (set:%d, rule:%d)
Attempted access matched a configured filter rule (denoted by
its set and rule number) and was blocked or forwarded
according to the rule.
Firewall session time
out, sent TCP RST
The router sent a TCP reset packet when a dynamic firewall
session timed out.
The default timeout values are as follows:
ICMP idle timeout: 3 minutes
UDP idle timeout: 3 minutes
TCP connection (three way handshaking) timeout: 270 seconds
TCP FIN-wait timeout: 2 MSL (Maximum Segment Lifetime set in
the TCP header).
TCP idle (established) timeout (s): 150 minutes
TCP reset timeout: 10 seconds
Exceed MAX incomplete,
sent TCP RST
The router sent a TCP reset packet when the number of
incomplete connections (TCP and UDP) exceeded the user-
configured threshold. (Incomplete count is for all TCP and UDP
connections through the firewall.)Note: When the number of
incomplete connections (TCP + UDP) > “Maximum Incomplete
High”, the router sends TCP RST packets for TCP connections
and destroys TOS (firewall dynamic sessions) until incomplete
connections < “Maximum Incomplete Low”.
Access block, sent TCP
RST
The router sends a TCP RST packet and generates this log if you
turn on the firewall TCP reset mechanism (via CI command: "sys
firewall tcprst").
Table 117 ICMP Logs
LOG MESSAGE
DESCRIPTION
Firewall default policy: ICMP
ICMP access matched the default policy and was blocked
or forwarded according to the user's setting. For type and
code details, see
Firewall rule [NOT] match: ICMP
ICMP access matched (or didn’t match) a firewall rule
(denoted by its number) and was blocked or forwarded
according to the rule. For type and code details, see
.
Triangle route packet forwarded:
ICMP
The firewall allowed a triangle route session to pass
through.
Packet without a NAT table entry
blocked: ICMP
The router blocked a packet that didn’t have a
corresponding NAT table entry.
Table 115 TCP Reset Logs (continued)
LOG MESSAGE
DESCRIPTION