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NMAP using a CISCO VPN

mog27mog27 Member Posts: 302
For a school project of mine we are supposed to use nmap to locate open ports from the outside and inside of a campus network. Finding ports from the outside is easy enough. However, I am using a CISCO AnyConnect VPN client to connect to the inside of the campus network and run an nmap scan against the internal network but NMAP keeps giving me "nexthost: Failed to determine dst MAC address for target 10.20.0.0"

Any suggestions? Thanks
"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." -- Ben Franklin

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