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DSL Log Messages (Most Common)
1. WAN: Data link
activated at <Rate> Kbps (rx/tx)
This log message is generated when the DSL link comes up.
2.WAN: Data link deactivated This log message is generated when the DSL link goes down.
3. RFC1483 up This log message is generated when RFC1483 link comes up.
4. RFC1483-<WAN-instance>: IP
down
This log message is generated when RFC1483 link goes down.
5. PPP: Channel <ID> up Dialout
Profile name: <Profile Name>
This log message is generated when a PPP channel comes up.
6. PPP-<WAN Instance> down:
<Reason>
This log message is generated when a PPP channel goes down. The reason
for the channel going down is displayed as well.
Access-Related Log Messages
1. permitted: This log message is generated whenever a packet is allowed to traverse
router interfaces or allowed to access the router itself.
2. attempt: This log message is generated whenever a packet attempts to traverse
router interfaces or attempts to access the router itself.
3. dropped - violation of security
policy:
This log message is generated whenever a packet, traversing the router or
destined to the router itself, is dropped by the firewall because it violates
the expected conditions.
4. dropped - invalid checksum: This log message is generated whenever a packet, traversing the router or
destined to the router itself, is dropped because of invalid IP checksum.
5. dropped - invalid data length: This log message is generated whenever a packet, traversing the router or
destined to the router itself, is dropped because the IP length is greater than
the received packet length or if the length is too small for an IP packet.
6. dropped - fragmented packet: This log message is generated whenever a packet, traversing the router, is
dropped because it is fragmented, stateful inspection is turned ON on the
packet's transmit or receive interface, and the deny-fragment option is
enabled.
7. dropped - cannot fragment: This log message is generated whenever a packet traversing the router is
dropped because the packet cannot be sent without fragmentation, but the
do-not-fragment bit is set.
8. dropped - no route found: This log message is generated whenever a packet, traversing the router or
destined to the router itself, is dropped because no route is found to for-
ward the packet.
9. dropped - invalid IP version: This log message is generated whenever a packet, traversing the router or
destined to the router itself, is dropped because the IP version is not 4.
10. dropped - possible land attack: This log message is generated whenever a packet, traversing the router or
destined to the router itself, is dropped because the packet is a TCP/UDP
packet and the source IP address and source port equals the destination IP
address and destination port.
11. TCP SYN flood detected: This log message is generated whenever a SYN packet destined to the
router's management interface is dropped because the number of SYN-sent
and SYN-receive messages exceeds one-half the number of allowable con-
nections in the router.
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