![]() What others have already discovered: the routing table is modified (and kept in this state), while packets are further filtered, probably using kernel hooks.īoth IPv4 and IPv6 are affected by this filtering, and traffic towards additional network interfaces also got redirected. We started investigating on both supported platforms mentioned above and found In our case, we had to use a hardware token that only had drivers for Windows and Mac, while most of our tools run best (and are already installed) on Linux. As it turns out, breaking this seal is not that hard, which can be useful for special cases like performing pentests over a VPN designed for average users. When that happens, connecting to the VPN seals off the client from the rest of the LAN. Some VPNs allow split tunneling, however, Cisco An圜onnect and many other solutions offer a way for network administrators to forbid this.
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