ZyXEL Communications P-792H - Page 260

Chapter 20 Logs
P-792H v2 User’s Guide
260
Table 84 Access Control Logs
LOG MESSAGE DESCRIPTION
Firewall default policy: [ TCP |
UDP | IGMP | ESP | GRE | OSPF ]
<Packet Direction>
Attempted TCP/UDP/IGMP/ESP/GRE/OSPF access
matched the default policy and was blocked or
forwarded according to the default policy’s
setting.
Firewall rule [NOT] match:[ TCP
| UDP | IGMP | ESP | GRE | OSPF
] <Packet Direction>, <rule:%d>
Attempted TCP/UDP/IGMP/ESP/GRE/OSPF access
matched (or did not match) a configured firewall
rule (denoted by its number) and was blocked or
forwarded according to the rule.
Triangle route packet forwarded:
[ TCP | UDP | IGMP | ESP | GRE |
OSPF ]
The firewall allowed a triangle route session to
pass through.
Packet without a NAT table entry
blocked: [ TCP | UDP | IGMP |
ESP | GRE | OSPF ]
The router blocked a packet that didn't have a
corresponding NAT table entry.
Router sent blocked web site
message: TCP
The router sent a message to notify a user that
the router blocked access to a web site that the
user requested.
Table 85 TCP Reset Logs
LOG MESSAGE DESCRIPTION
Under SYN flood attack,
sent TCP RST
The router sent a TCP reset packet when a host was
under a SYN flood attack (the TCP incomplete count is per
destination host.)
Exceed TCP MAX
incomplete, sent TCP RST
The router sent a TCP reset packet when the number of
TCP incomplete connections exceeded the user configured
threshold. (the TCP incomplete count is per destination
host.) Note: Refer to TCP Maximum Incomplete in the
Firewall Attack Alerts screen.
Peer TCP state out of
order, sent TCP RST
The router sent a TCP reset packet when a TCP
connection state was out of order.Note: The firewall refers
to RFC793 Figure 6 to check the TCP state.
Firewall session time
out, sent TCP RST
The router sent a TCP reset packet when a dynamic
firewall session timed out.Default timeout values:ICMP
idle timeout (s): 60UDP idle timeout (s): 60TCP
connection (three way handshaking) timeout (s): 30TCP
FIN-wait timeout (s): 60TCP idle (established) timeout
(s): 3600