ZyXEL Prestige 202H Plus ISDN Router 91-003-154001B Manuale Utente

P-202H Plus v2 User’s Guide

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Appendix C Log Descriptions

 

 

readNetBIOSFilter: calloc 
error

The router failed to allocate memory for the NetBIOS filter settings.

WAN connection is down.

A WAN connection is down. You cannot access the network 

through this interface.

Table 118   Access Control Logs

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 119   TCP Reset Logs

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.

Table 117   System Error Logs (continued)