# address authentication message-digest

#### Syntax

[ no ] address { ipAddress | unnumbered interfaceType interfaceSpecifier } authentication message-digest

#### Release Information

Command introduced before JunosE Release 7.1.0.

#### Description

Specifies that MD5 authentication is used for the OSPF interface. The no version sets authentication for the interface to none, but leaves any configured MD5 key intact.

| Note: You must issue the address area command before issuing this command.

#### Options

- ipAddress—OSPF interface address previously specified with the address command
- unnumbered—Indicates that OSPF is running on an unnumbered interface previously specified with the address command
  - interfaceType—Interface type; see Interface Types and Specifiers
  - interfaceSpecifier—Particular interface; format varies according to interface type; see Interface Types and Specifiers

#### Mode

Router Configuration