exclude zoom, teams, webex cidrs from openvpn routes (split tunnel)

exclude_webconf_cidrs.py

import requests
import re
import ipaddress

with requests.Session() as s:
  r = s.get('https://support.zoom.us/hc/en-us/articles/201362683-Network-Firewall-or-Proxy-Server-Settings-for-Zoom%C2%A0%20')
  zoom = list(set(re.findall(r'(?:\d{1,3}.){3}\d{1,3}\/\d{1,2}', r.text)))

  #r = s.get('https://docs.microsoft.com/en-us/microsoft-365/enterprise/urls-and-ip-address-ranges?view=o365-worldwide#skype-for-business-online-and-microsoft-teams')
  #teams = list(set(re.findall(r'(?:\d{1,3}.){3}\d{1,3}\/\d{1,2}', r.text)))
  teams = [ '13.107.64.0/18', '52.112.0.0/14', '52.120.0.0/14', '52.238.119.141/32', '52.244.160.207/32' ]

  r = s.get('https://help.webex.com/en-us/WBX264/How-Do-I-Allow-Webex-Meetings-Traffic-on-My-Network#id_135011')
  webex = list(set(re.findall(r'(?:\d{1,3}.){3}\d{1,3}\/\d{1,2}', r.text)))

  all = list(set(zoom+teams+webex))
  print(len(all),all)

  for cidr in all:
    res = ipaddress.ip_network(cidr)
    print("""echo "push 'route {} net_gateway'" >>${{CC}}""".format(res.with_netmask.replace('/',' ')))

  with open('all_cidrs.txt', 'w') as f:
    for cidr in all:
      f.write(cidr+'\n')