Quickly gather access-lists stats from Cisco ASA Firewalls
ACL Stats is a tool to help extract basic info from access-list from a Cisco ASA Firewall, and output the information in a structured way.
The script currently collects the number of hits for each acl entry and the date of the last hit.
First, install it via pip:
pip install acl_stats
Use it as a command line tool. You can get contextual help in the cli:
acl_stats --help
There are two main modes to pass the access-lists to the script.
The script can connect to a device in the network and gather the informatoin needed. A connection is made via HTTPS (same transport as ASDM), hence the firewall will need to have that method enabled.
Run acl_stats device --help to get the contextual help listing all the available parameters:
$ acl_stats device --help 02:35:23
ACL Stats
Usage: acl_stats device [OPTIONS]
Connect to a device to fech ACLs
Options:
--hostname TEXT Hostname or IP of device to connect [required]
--port INTEGER port to use when connection to a device [required]
--username TEXT username to use when connection to a device [required]
--password TEXT password to use when connection to a device [required]
--acl-name TEXT Name of target ACL [required]
--output TEXT Choose an output format: json, csv. Defaults to csv
--write-to TEXT Write the output to a file
--help Show this message and exit.Here's an example:
acl_stats device --hostname 192.168.218.72 --port 443 --username cisco --password cisco --acl-name inside_in --output jsonIf you ommit the --write-to parameter, the output will be sent to stdout(the terminal, usually).
You can also run the script 'off-line', using previously extracted command outputs. The script processes one access-list at a time for now. Here are the two commands you need to save in separete files:
show acess-list _name_of_acl
show access-list _name_of_acl brief
Run acl_stats static --help to get the contextual help listing all the available parameters:
$ acl_stats static --help 02:47:19
ACL Stats
Usage: acl_stats static [OPTIONS]
Use static files instead of connection to a device
Options:
--acl-file TEXT File containing the output of the show acess-list _name_
command [required]
--acl-brief TEXT File containing the output of the show acess-list _name_
brief command [required]
--output TEXT Choose an output format: json, csv. Defaults to csv
--write-to TEXT Write the output to a file
--help Show this message and exit.Here's an example:
acl_stats static --acl-file acl.log --acl-brief acl_brief.log --output json --write-to acl-inside_in.csvJSON Output
$ acl_stats acl_stats device --hostname 192.168.218.72 --port 443 --username cisco --password cisco --acl-name inside_in --output json 02:47:23
ACL Stats
Using Device 192.168.218.72
Contacting Device
Fetching ACL
Fetching ACL Brief
Processing
Done!
[
{
"entry_id": "20d85be5",
"grouped_id": "00000000",
"line": "1",
"hitcount": 3,
"last_hit_date": "2018-10-11 09:50:52",
"timestamp": 1539262252,
"entry": "access-list inside_in line 1 extended permit icmp any host 10.0.0.10 (hitcnt=3) 0x20d85be5"
},
{
"entry_id": "bde0d47c",
"grouped_id": "-",
"line": "2",
"hitcount": 0,
"last_hit_date": "0",
"timestamp": 0,
"entry": "access-list inside_in line 2 extended permit tcp any host 10.0.0.10 eq www (hitcnt=0) 0xbde0d47c"
},
{
"entry_id": "20414f5d",
"grouped_id": "-",
"line": "3",
"hitcount": 0,
"last_hit_date": "0",
"timestamp": 0,
"entry": "access-list inside_in line 3 extended deny tcp any host 10.0.0.10 eq gopher inactive (hitcnt=0) (inactive) 0x20414f5d"
},
{
"entry_id": "49ae2fb8",
"grouped_id": "-",
"line": "4",
"hitcount": 0,
"last_hit_date": "0",
"timestamp": 0,
"entry": "access-list inside_in line 4 extended deny tcp any host 10.0.0.10 eq telnet (hitcnt=0) 0x49ae2fb8"
}
]
Lines processed (acls + brief): 5
Total execution time: 0.09016704559326172s.CSV output:
$ acl_stats acl_stats device --hostname 192.168.218.72 --port 443 --username cisco --password cisco --acl-name inside_in --output csv 02:57:21
ACL Stats
Using Device 192.168.218.72
Contacting Device
Fetching ACL
Fetching ACL Brief
Processing
Done!
entry_id,grouped_id,line,hitcount,last_hit_date,timestamp,entry
20d85be5,00000000,1,3,2018-10-11 09:50:52,1539262252,access-list inside_in line 1 extended permit icmp any host 10.0.0.10 (hitcnt=3) 0x20d85be5
bde0d47c,-,2,0,0,0,access-list inside_in line 2 extended permit tcp any host 10.0.0.10 eq www (hitcnt=0) 0xbde0d47c
20414f5d,-,3,0,0,0,access-list inside_in line 3 extended deny tcp any host 10.0.0.10 eq gopher inactive (hitcnt=0) (inactive) 0x20414f5d
49ae2fb8,-,4,0,0,0,access-list inside_in line 4 extended deny tcp any host 10.0.0.10 eq telnet (hitcnt=0) 0x49ae2fb8
Lines processed (acls + brief): 5
Total execution time: 0.08188796043395996s.