ZyXEL P-202H User Guide - Page 328
P-202H Plus v2 User's Guide, Appendix C Log Descriptions, Access Control Logs, TCP Reset Logs,
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P-202H Plus v2 User's Guide Table 117 System Error Logs (continued) LOG MESSAGE DESCRIPTION readNetBIOSFilter: calloc error WAN connection is down. The router failed to allocate memory for the NetBIOS filter settings. A WAN connection is down. You cannot access the network through this interface. Table 118 Access Control Logs LOG MESSAGE DESCRIPTION Firewall default policy: [TCP | UDP | IGMP | ESP | GRE | OSPF] 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] , 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: The firewall allowed a triangle route session to pass [TCP | UDP | IGMP | ESP | GRE | through. OSPF] Packet without a NAT table entry The router blocked a packet that didn't have a blocked: [TCP | UDP | IGMP | ESP corresponding NAT table entry. | GRE | OSPF] 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 119 TCP Reset Logs LOG MESSAGE Under SYN flood attack, sent TCP RST Exceed TCP MAX incomplete, sent TCP RST Peer TCP state out of order, sent TCP RST DESCRIPTION The router sent a TCP reset packet when a host was under a SYN flood attack (the TCP incomplete count is per destination host.) 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. 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. 327 Appendix C Log Descriptions