IKE is used on VPN servers on UDP 500. Test a serv­er with ike-scan -M $target Exam­ple output: SA=(Enc=3DES Hash=SHA1 Group=2:modp1024 Auth=PSK LifeType=Seconds LifeDuration(4)=0x00007080) Ending ike-scan 1.9.4: 1 hosts scanned in 0.039 seconds (25.32 hosts/sec). 1 returned handshake; 0 returned notify PSK means that a pre­shared key is used. 1 returned hand­shake, 0, returned noti­fy means that…