netconan 0.9.0

Netconan network configuration anonymization utilities

Netconan

Netconan (network configuration anonymizer) anonymizes text files that contain sensitive network information.

With Netconan, a sensitive input file

$ cat sensitive/cisco.cfg
! This is intentionet's sensitive comment
username admin password 7 122A001901
enable secret 5 $1$wtHI$0rN7R8PKwC30AsCGA77vy.
!
tacacs-server host 10.10.10.10 key pwd1234
ip address 10.10.20.30/24
ip address 2001:2002::9d3b:1
!
route-map sea-to-lax ...
route-map sea-to-atl ...

can be anonymized

$ netconan -i sensitive -o anonymized \
    --sensitive-words intentionet,sea,lax,atl \
    --anonymize-passwords \
    --anonymize-ips
WARNING No salt was provided; using randomly generated "WNo5pX28MJOrqxfv"
INFO Anonymizing cisco.cfg

to produce an output file you can feel comfortable sharing.

$ cat anonymized/cisco.cfg
! This is db1792's sensitive comment
username admin password 7 09424B1D1A0A1913053E012724322D3765
enable secret 5 $1$0000$EhfXcDfB7iiakW6mwMy1i.
!
tacacs-server host 119.72.192.224 key netconanRemoved2
ip address 119.72.218.183/24
ip address cd7e:83e:1eaf:2ada:7535:591e:6d47:a4b8
!
route-map e69ceb-to-880ac2 ...
route-map e69ceb-to-5d37ad ...

Installing Netconan

Install Netconan using pip:

$ pip install netconan

Features

Netconan can anonymize many types of sensitive information:

• Sensitive strings like passwords or SNMP community strings (--anonymize-passwords, -p), for many common network vendors.

• IPv4 and IPv6 addresses (--anonymize-ips, -a).

• User-specified sensitive words (--sensitive-words, -w). Note that any occurrence of a specified sensitive word will be replaced regardless of context, even if it is part of a larger string.

• User-specified AS numbers (--as-numbers, -n). Note that any number matching a specified AS number will be anonymized.

Netconan attempts to preserve useful structure. For example,

• Netconan preserves prefixes when anonymizing IPv4 and IPv6 addresses: IP addresses with a common prefix before anonymization will share the same prefix length after anonymization. For more information, see J. Xu et al., On the Design and Performance of Prefix-Preserving IP Traffic Trace Anonymization, ACM SIGCOMM Workshop on Internet Measurement, 2001 [link].

• IPv4 classes are preserved.

• AS number blocks are preserved (i.e. an anonymized public AS number will still be in the public AS number range after anonymization).

• Standard password and hash formats (salted md5, Cisco Type 7, Juniper Type 9) are recognized and substituted with format-compliant replacements.

Netconan is deterministic when provided the same user-controllable salt (--salt, -s). Files processed using the same salt are compatible (e.g., IP addresses anonymized the same way) whether anonymized together or separately.

For reversible operations (specifically, IP address anonymization), Netconan can produce a de-anonymized file (--undo, -u) when provided with the same salt used in anonymization (--salt, -s).

Running netconan

Netconan processes the input file or recursively processes files in the input directory (skipping files starting with .) and saves processed files at the specified output.

For more information about less commonly-used features, see the Netconan help (-h). For more information on config file syntax, see here.

usage: netconan [-h] [-a] [-c CONFIG] [-d DUMP_IP_MAP] -i INPUT
                [-l {DEBUG,INFO,WARNING,ERROR,CRITICAL}] [-n AS_NUMBERS] -o
                OUTPUT [-p] [-r RESERVED_WORDS] [-s SALT] [-u]
                [-w SENSITIVE_WORDS]

Args that can start with '--' can also be set in a config file (specified via
-c). If an arg is specified in more than one place, then command line values
override config file values which override defaults. Config file syntax
allows: key=value, flag=true, stuff=[a,b,c] (for more details, see here
https://goo.gl/R74nmi).

optional arguments:
  -h, --help            show this help message and exit
  -a, --anonymize-ips   Anonymize IP addresses
  -c CONFIG, --config CONFIG
                        Config file specifying params
  -d DUMP_IP_MAP, --dump-ip-map DUMP_IP_MAP
                        Dump IP address anonymization map to specified file
  -i INPUT, --input INPUT
                        Input file or directory containing files to anonymize
  -l {DEBUG,INFO,WARNING,ERROR,CRITICAL}, --log-level {DEBUG,INFO,WARNING,ERROR,CRITICAL}
                        Determines what level of logs to display
  -n AS_NUMBERS, --as-numbers AS_NUMBERS
                        List of comma separated AS numbers to anonymize
  -o OUTPUT, --output OUTPUT
                        Output file or directory where anonymized files are placed
  -p, --anonymize-passwords
                        Anonymize password and snmp community lines
  -r RESERVED_WORDS, --reserved-words RESERVED_WORDS
                        List of comma separated words that should not be
                        anonymized
  -s SALT, --salt SALT  Salt for IP and sensitive keyword anonymization
  -u, --undo            Undo reversible anonymization (must specify salt)
  -w SENSITIVE_WORDS, --sensitive-words SENSITIVE_WORDS
                        List of comma separated keywords to anonymize