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# tunnel pfs group

#### Syntax

tunnel pfs group { 1 | 2 | 5 }

no tunnel pfs group

#### Release Information

Command introduced before JUNOSe Release 7.1.0.

#### Description

Configures perfect forward secrecy for the IPSec tunnel by assigning a Diffie-Hellman prime modulus group. The no version removes PFS from this tunnel.

#### Options

- 1—Assigns a 768-bit Diffie-Hellman prime modulus group
- 2—Assigns a 1024-bit Diffie-Hellman prime modulus group
- 5—Assigns a 1536-bit Diffie-Hellman prime modulus group

#### Mode

Interface Configuration

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