Bedienungsanleitung ZyXEL VMG8924-B10A series (Seite 381 von 412) (Englisch)

679690

381

Zoom out

Zoom in

Vorherige Seite

1/412

Nächste Seite

Appendix E Wireless LANs

VMG8924-B10A and VMG8924-B30A Series User’s Guide

381

• Accounting-Request

Sent by the access point requesting accounting.

• Accounting-Response

Sent by the RADIUS server to indicate that it has started or stopped accounting.

In order to ensure network security, the access point and the RADIUS server use a shared secret

key, which is a password, they both know. The key is not sent over the network. In addition to the

shared key, password information exchanged is also encrypted to protect the network from

unauthorized access.

Types of EAP Authentication

This section discusses some popular authentication types: EAP-MD5, EAP-TLS, EAP-TTLS, PEAP and

LEAP. Your wireless LAN device may not support all authentication types.

EAP (Extensible Authentication Protocol) is an authentication protocol that runs on top of the IEEE

802.1x transport mechanism in order to support multiple types of user authentication. By using EAP

to interact with an EAP-compatible RADIUS server, an access point helps a wireless station and a

RADIUS server perform authentication.

The type of authentication you use depends on the RADIUS server and an intermediary AP(s) that

supports IEEE 802.1x.

For EAP-TLS authentication type, you must first have a wired connection to the network and obtain

the certificate(s) from a certificate authority (CA). A certificate (also called digital IDs) can be used

to authenticate users and a CA issues certificates and guarantees the identity of each certificate

owner.

EAP-MD5 (Message-Digest Algorithm 5)

MD5 authentication is the simplest one-way authentication method. The authentication server

sends a challenge to the wireless client. The wireless client ‘proves’ that it knows the password by

encrypting the password with the challenge and sends back the information. Password is not sent in

plain text.

However, MD5 authentication has some weaknesses. Since the authentication server needs to get

the plaintext passwords, the passwords must be stored. Thus someone other than the

authentication server may access the password file. In addition, it is possible to impersonate an

authentication server as MD5 authentication method does not perform mutual authentication.

Finally, MD5 authentication method does not support data encryption with dynamic session key. You

must configure WEP encryption keys for data encryption.

EAP-TLS (Transport Layer Security)

With EAP-TLS, digital certifications are needed by both the server and the wireless clients for

mutual authentication. The server presents a certificate to the client. After validating the identity of

the server, the client sends a different certificate to the server. The exchange of certificates is done

in the open before a secured tunnel is created. This makes user identity vulnerable to passive

attacks. A digital certificate is an electronic ID card that authenticates the sender’s identity.

However, to implement EAP-TLS, you need a Certificate Authority (CA) to handle certificates, which

imposes a management overhead.

Missbrauch melden von Frage und/oder Antwort

Libble nimmt den Missbrauch seiner Dienste sehr ernst. Wir setzen uns dafür ein, derartige Missbrauchsfälle gemäß den Gesetzen Ihres Heimatlandes zu behandeln. Wenn Sie eine Meldung übermitteln, überprüfen wir Ihre Informationen und ergreifen entsprechende Maßnahmen. Wir melden uns nur dann wieder bei Ihnen, wenn wir weitere Einzelheiten wissen müssen oder weitere Informationen für Sie haben.

ZyXEL VMG8924-B10A series Seite 381

Brauchen Sie Hilfe? Stellen Sie Ihre Frage.

Missbrauch melden von Frage und/oder Antwort

Art des Missbrauchs:

Forenregeln

Neu registrieren

Das Handbuch wird per E-Mail gesendet. Überprüfen Sie ihre E-Mail.

Ihre Frage wurde zu diesem Forum hinzugefügt

Info