Cisco Cisco Firepower Management Center 4000

Any port you add to the POP port list should also be added to the TCP client reassembly list for 
each TCP policy. For information on configuring TCP reassembly ports, see 

Specifies the maximum number of bytes to extract and decode from each Base64 encoded MIME 
email attachment. You can specify from 1 to 65535 bytes, or specify 0 to decode all the Base64 data. 
Specify -1 to ignore Base64 data.

Note that positive values not divisible by 4 are rounded up to the next multiple of 4 except for the 
values 65533, 65534, and 65535, which are rounded down to 65532.

When Base64 decoding is enabled, you can enable rule 142:4 to generate an event when decoding 
fails; decoding could fail, for example, because of incorrect encoding or corrupted data. See 

 for more information.

Specifies the maximum bytes of data to extract from each MIME email attachment that does not 
require decoding. These attachment types include 7-bit, 8-bit, binary, and various multipart content 
types such as plain text, jpeg images, mp3 files, and so on. You can specify from 1 to 65535 bytes, 
or specify 0 to extract all data in the packet. Specify -1 to ignore non-decoded data.

Specifies the maximum number of bytes to extract and decode from each quoted-printable (QP) 
encoded MIME email attachment. You can specify from 1 to 65535 bytes, or specify 0 to decode all 
QP encoded data in the packet. Specify -1 to ignore QP encoded data.

When quoted-printable decoding is enabled, you can enable rule 142:6 to generate an event when 
decoding fails; decoding could fail, for example, because of incorrect encoding or corrupted data. 
See 

 for more information.

Specifies the maximum number of bytes to extract and decode from each Unix-to-Unix encoded 
(uuencoded) email attachment. You can specify from 1 to 65535 bytes, or specify 0 to decode all 
uuencoded data in the packet. Specify -1 to ignore uuencoded data.

When Unix-to-Unix decoding is enabled, you can enable rule 142:7 to generate an event when 
decoding fails; decoding could fail, for example, because of incorrect encoding or corrupted data. 
See 

 for more information.

Protection

Use the following procedure to configure the POP preprocessor. For additional information on POP 
preprocessor configuration options, see 

.

Admin/Intrusion Admin

Select