Before taking any decision related to VPN / Remote access , please consider following changes happened recently in Qatar . 1- After recent upgradation from ADSL to Fiber , users facing issues with IPSec/ISAKMP traffic . Because of this many site-to-site VPN locations become unstable . It is applicable to 3G/4G and Fiber connections , but not applicable to MPLS/Internet-IP-VPN/Static-IP/Leased-line/V-sat connections . Solution : Use Cisco based cTCP ( https://www.cisco.com/c/en/us/products/collateral/security/ios-easy-vpn/prod_white_paper0900aecd8061e2b3.html ) or OpenVPN . Both of this are not using standard UDP/ TCP ports for VPN . You can use/change any port…
