# snmpwalk version 3
# -A is the PASSPHRASE set authentication protocol pass phrase
# -X is the PASSPHRASE set privacy protocol pass phrase
# -a PROTOCOL set authentication protocol (MD5|SHA)
# -x PROTOCOL set privacy protocol (DES|AES)
snmpwalk -v3 -x DES -l authPriv -u admin -x DES -a MD5 -A vpn12345 -X vpn12345 172.31.253.168 .1.3.6.1.4.1.2620.1.6.7.4.3