Avocent ACS 6004. Management protocols: SNMP. Authentication method: TACACS+, LDAP, LDAP/AD, Kerberos, NIS, RSA/SecurID, OTP, PAP/CHAP, Security algorithms supported: 802.1x RADIUS, EAP, SSH, SSH-2. Console port: RS-232. Operating system installed: Linux Kernel 2.6.12. Dimensions (WxDxH): 438.2 x 241.3 x 44.5 mm, Weight: 2.99 kg