Ports 500, 4500, 1701 are open, and reachable with netcat. I am not behind a NAT - I am trying to connect from a client within the Ethernet segment that the server is running on, and have turned off firewalls for sanity check. Netcat commands below (note that the IP address is redacted):
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nc -uvw5 host 1701
Connection to host port 1701 [udp/l2f] succeeded!
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nc -uvw5 host 4500
Connection to host port 4500 [udp/ipsec-msft] succeeded!
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nc -uvw5 host 500
Connection to host port 500 [udp/isakmp] succeeded!
Anyone have any ideas?