Intrusion prevention event descriptions

ID Event Notes
200 Region Too Big A region (edit region, uri etc) exceeded the maximum allowed buffering size (7570 bytes) without being closed. This is usually because the data does not conform to the protocol.
201 Insufficient Memory The packet could not be processed properly because resources were exhausted. This can be because there are too many concurrent connections at the same time or simply because the system is out of memory.
202 Maximum Edits Exceeded The maximum number of edits (32) in a single region of a packet was exceeded.
203 Edit Too Large Editing attempted to increase the size of the region above the maximum allowed size (8188 bytes).
204 Max Matches in Packet Exceeded There are more than 2048 positions in the packet with pattern match occurrences. An error is returned at this limit and the connection is dropped because this usually indicates a garbage or evasive packet.
205 Engine Call Stack Too Deep
206 Runtime Error Runtime error.
207 Packet Read Error Low level problem reading packet data.
300 Unsupported Cipher An unknown or unsupported Cipher Suite has been requested.
301 Error Generating Master Key(s) Unable to derive the cryptographic keys, Mac secrets, and initialization vectors from the master secret.
302 Record Layer Message (not ready) The SSL state engine has encountered an SSL record before initialization of the session.
303 Handshake Message (not ready) The SSL state engine has encountered a handshake message after the handshake has been negotiated.
304 Out Of Order Handshake Message A well formatted handshake message has been encountered out of sequence.
305 Memory Allocation Error The packet could not be processed properly because resources were exhausted. This can be because there are too many concurrent connections at the same time or simply because the system is out of memory.
306 Unsupported SSL Version A client attempted to negotiate an SSL V2 session.
307 Error Decrypting Pre-master Key Unable to un-wrap the pre-master secret from the ClientKeyExchange message.
308 Client Attempted to Rollback A client attempted to rollback to an earlier version of the SSL protocol than that which was specified in the ClientHello message.
309 Renewal Error An SSL session was being requested with a cached session key that could not be located.
310 Key Exchange Error The server is attempting to establish an SSL session with temporarily generated key.
311 Maximum SSL Key Exchanges Exceeded The maximum number of concurrent key exchange requests was exceeded.
312 Key Too Large The master secret keys are larger than specified by the protocol identifier.
313 Invalid Parameters In Handshake An invalid or unreasonable value was encountered while trying to decode the handshake protocol.
314 No Sessions Available
315 Compression Method Unsupported
316 Unsupported Application-Layer Protocol An unknown or unsupported SSL Application-Layer Protocol has been requested.
500 URI Path Depth Exceeded Too many "/" separators. Max 100 path depth.
501 Invalid Traversal Tried to use "../" above root.
502 Illegal Character in URI Illegal character used in uri.
503 Incomplete UTF8 Sequence URI ended in middle of utf8 sequence.
504 Invalid UTF8 encoding Invalid/non-canonical encoding attempt.
505 Invalid Hex Encoding %nn where nn are not hex digits.
506 URI Path Length Too Long Path length is greater than 512 characters.
507 Invalid Use of Character Use of disabled characters
508 Double Decoding Exploit Double decoding exploit attempt (%25xx, %25%xxd, etc).
700 Invalid Base64 Content Packet content that was expected to be encoded in Base64 format was not encoded correctly.
710 Corrupted Deflate/GZIP Content Packet content that was expected to be encoded in Base64 format was not encoded correctly.
711 Incomplete Deflate/GZIP Content Incomplete Deflate/GZIP content
712 Deflate/GZIP Checksum Error Deflate/GZIP checksum error.
713 Unsupported Deflate/GZIP Dictionary Unsupported Deflate/GZIP dictionary.
714 Unsupported GZIP Header Format/Method Unsupported GZIP header format/method.
801 Protocol Decoding Search Limit Exceeded A protocol decoding rule defined a limit for a search or pdu object but the object was not found before the limit was reached.
802 Protocol Decoding Constraint Error A protocol decoding rule decoded data that did not meet the protocol content constraints.
803 Protocol Decoding Engine Internal Error
804 Protocol Decoding Structure Too Deep A protocol decoding rule encountered a type definition and packet content that caused the maximum type nesting depth (16) to be exceeded.
805 Protocol Decoding Stack Error A rule programming error attempted to cause recursion or use to many nested procedure calls.
806 Infinite Data Loop Error