ZyXEL NBG334W User Guide - Page 183

Table 77, Table 78, Table 76

Page 183 highlights

Chapter 19 Logs Table 76 TCP Reset Logs (continued) LOG MESSAGE DESCRIPTION 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 userconfigured 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 77 Packet Filter Logs LOG MESSAGE [TCP | UDP | ICMP | IGMP | Generic] packet filter matched (set:%d, rule:%d) DESCRIPTION Attempted access matched a configured filter rule (denoted by its set and rule number) and was blocked or forwarded according to the rule. Table 78 ICMP Logs LOG MESSAGE Firewall default policy: ICMP , , Firewall rule [NOT] match: ICMP , , , Triangle route packet forwarded: ICMP Packet without a NAT table entry blocked: ICMP Unsupported/out-of-order ICMP: ICMP Router reply ICMP packet: ICMP DESCRIPTION ICMP access matched the default policy and was blocked or forwarded according to the user's setting. For type and code details, see Table 87 on page 188. 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 Table 87 on page 188. The firewall allowed a triangle route session to pass through. The router blocked a packet that didn't have a corresponding NAT table entry. The firewall does not support this kind of ICMP packets or the ICMP packets are out of order. The router sent an ICMP reply packet to the sender. NBG334W User's Guide 183

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Chapter 19 Logs
NBG334W User’s Guide
183
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 77
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.
Table 78
ICMP Logs
LOG MESSAGE
DESCRIPTION
Firewall default policy: ICMP
<Packet Direction>, <type:%d>,
<code:%d>
ICMP access matched the default policy and was
blocked or forwarded according to the user's setting. For
type and code details, see
Table 87 on page 188
.
Firewall rule [NOT] match: ICMP
<Packet Direction>, <rule:%d>,
<type:%d>, <code:%d>
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
Table 87 on page 188
.
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.
Unsupported/out-of-order ICMP:
ICMP
The firewall does not support this kind of ICMP packets
or the ICMP packets are out of order.
Router reply ICMP packet: ICMP
The router sent an ICMP reply packet to the sender.
Table 76
TCP Reset Logs (continued)
LOG MESSAGE
DESCRIPTION