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VPN and traffic filtering

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VPN server assigns to the client public ip address and doesn't offer NAT function. In this case, can firewall on the client side to filter (inspect) VPN traffic (L2TP/IPSec, IKEv2, SSTP, OpenVPN)? I mean is it possible to block unsolicited inbound packets that come from VPN tunnel? Why drivers (items) of some firewalls appear in TAP device (OpenVPN) interface and don't appear in L2TP, IKEv2, SSTP WAN miniport interfaces? Does it have impact on traffic filtering?

Tags:vpn, firewalls

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