ADTRAN Express 6120 Manual de instrucciones descargar pdf (Pagina 61)

Chapter 3. Terminal Menu Operation and Structure

61200176L1-1 Express 6100/6120 User Manual 3-27

numberof attempts to communicatewith the primary server isequal to

theretrycount,thesecondaryserver(ifdefined) istried. If thesecondary

server does notrespond within the retry count, the PPPpeer (or Telnet

session) is not authenticated and is dropped. The default is 5.

»» Security/PPP

Write security:1; Readsecurity: 2

The PPP peer can be authenticated using three standard methods:

PAP (Password Authentication Protocol), CHAP (Challenge Hand-

shake Protocol) and EAP (Extensible Authentication Protocol). The

strengthoftheauthenticationisdetermined intheorderEAP,CHAP,

followed byPAP, whereEAPisthe strongestand PAPisthe weakest.

PAP is a clear-text protocol, which means it is sent over the PPP link

inareadableformat. Care mustbetaken nottoallow highlysensitive

passwords to become compromised using this method. CHAP and

EAP use a one-way hashing algorithm which makes it virtually im-

possibletodeterminethepassword. EAPhasothercapabilitieswhich

allow more flexibility than CHAP.

The following selections are possible:

»» Security/Filter Defines

The Express 6100/6120 can filter packetsbased on certain parameters

withinthepacket. Themethodusedbythe Express 6100/6120allows

the highest flexibility for defining filters and assigning them to a pro-

file. The filters are set up in two steps: (1) defining the packet types,

and (2) adding them to a list under the PPP profile or DLCI map. See

PAP, CHAP or

EAP (def)

TheExpress6100/6120willaskfor EAP during

thefirstPPPLCPnegotiationandallowthePPP

peer to negotiate down to CHAP or PAP.

CHAP or EAP TheExpress6100/6120willaskfor EAP during

thefirstPPPLCPnegotiationandallowthePPP

peer to negotiate down to CHAP but not PAP.

EAP The Express 6100/6120will only allow EAP tobe

negotiated.IfthePPPpeer isnotcapableofdoing

EAP,then the connection will not succeed.

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ADTRAN Express 6120 Manual de instrucciones Pagina 61