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Juniper Secure Connect is Juniper’s client-based SSL-VPNsolution that offers secure connectivity for your network resources.

Juniper Secure Connect provides secure remote access for theusers to connect to the corporate networks and resources remotelyusing the Internet. Juniper Secure Connect downloads the configurationfrom SRX Services devices and chooses the most effective transportprotocols during connection establishment to deliver a great administratorand user experience.

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To create a remote access VPN for Juniper secure connect:

Choose Remote Access > Save to complete Secure Connect VPN Configurationand associated policy if you have selected the auto policy creationoption.

If you want to discard your changes, click

Field

Action

Name

Enter a name for the remote access connection. This namewill be displayed as the end users realm name in the Juniper SecureConnect Client.

Description

Enter a description. This description will be used forthe IKE and IPsec proposals, policies, remote access profile, clientconfiguration, and NAT rule set.

During edit the IPsec policy description will be displayed.IPsec policy and remote access profile descriptions will be updated.

Routing Mode

This option is disabled for the remote access.

Default mode is Traffic Selector (Auto Route Insertion).

Authentication Method

Select an authentication method from the list that thedevice uses to authenticate the source of Internet Key Exchange (IKE)messages:

Pre-shared Key (default method)—Specifies that apreshared key, which is a secret key shared between the two peers,is used during authentication to identify the peers with each other.The same key must be configured for each peer. This is the defaultmethod.
Certificate Based—Specifies the type of digitalsignatures, which are certificates that confirm the identity of thecertificate holder.
The supported signature is rsa-signatures. rsa-signatures specifiesthat a public key algorithm, which supports encryption and digitalsignatures, is used.

Auto-create Firewall Policy

If you select No, you don’t have a firewallpolicy option. You need to manually create the required firewall policyto make this VPN work.

Note: If you do not want to auto-create a firewall policy inthe VPN workflow, then the protected network is hidden for dynamicrouting in both local and remote gateway.

Remote User

Displays the remote user icon in the topology. Clickthe icon to configure the Juniper Secure Connect client settings.

For more information on the fields, see Table 2.

Note: The J-Web UI displays the remote user's URL once localgateway is configured.

Local Gateway

Displays the local gateway icon in the topology. Clickthe icon to configure the local gateway.

For more information on the fields, see Table 3.

IKE and IPsec Settings

Configure the custom IKE or IPsec proposal and the customIPsec proposal with recommended algorithms or values.

For more information on the fields, see Table 6.

Note:

J-Web supports only one custom IKE proposal and does notsupport the predefined proposal-set. Upon edit and save, J-Web deletesthe predefined proposal set if configured.
On the remote gateway of the VPN tunnel, you must configurethe same custom proposal and policy.
Upon edit, J-Web shows the first custom IKE and IPsecproposal when more than one custom proposal is configured.

Table 2: Fields on theRemote User Page

Field
Action
Default Profile
Enable this option to use the configured VPN name asremote access default profile.
Note:
This option is not available if the default profile isconfigured.
You must enable the default profile. If not enabled, configurethe default profile under IPsec VPN > Remote Access VPN.
Connection Mode
Select one of the following options from the list toestablish the Juniper Secure Connect client connection:
Always—You are automatically connectedto the VPN tunnel every time you log in.
The default connection mode is Manual.
SSL VPN
Enable this option to establish SSL VPN connection fromthe Juniper Secure Connect Client to the SRX Series device.
By default this option is enabled.
Note: This is a fallback option when IPsec ports are not reachable.
Biometric authentication
Enable this option to authenticate the client systemusing unique configured methods.
An authentication prompt is displayed when you connect in theclient system. The VPN connection will only be initiated after successfulauthentication through the method configured for WindowsHello (fingerprint recognition, face recognition, PIN entry,and so on).
Windows Hello must be preconfigured onthe client system if the Biometric authentication option is enabled.
Dead Peer Detection
Enable the dead peer detection (DPD) option to allowthe Juniper Secure Connect client to detect if the SRX Series deviceis reachable.
Disable this option to allow the Juniper Secure Connect clientto detect till the SRX Series device connection reachability is restored.
This option is enabled by default.
DPD Interval
Enter the amount of time that the peer waits for trafficfrom its destination peer before sending a dead-peer-detection (DPD)request packet. The Range is 2 through 60 seconds and default is 60seconds.
DPD Threshold
Enter the maximum number of unsuccessful dead peer detection(DPD) requests to be sent before the peer is considered unavailable.The Range is 1 through 5 and default is 5.
Certificates
Enable Certificates to configure certificate optionson Secure Client Connect.
Note: This option is available only if you select the CertificateBased authentication method.
Expiry Warning
Enable this option to display the certificate expirywarning on the Secure Connect Client.
This option is enabled by default.
Note: This option is available only if you enable Certificates.
Warning Interval
Enter the interval (days) at which the warning to bedisplayed.
Range is 1 through 90. Default value is 60.
Note: This option is available only if you enable Certificates.
Pin Req Per Connection
Enable this option to enter the certificate pin on veryconnection.
This option is enabled by default.
Note: This option is available only if you enable Certificates.
EAP-TLS
Enable this option for the authentication process. IKEv2requires EAP for user authentication. SRX Series device cannot actas an EAP server. An external RADIUS server must be used for IKEv2EAP to do the EAP authentication. SRX will act as a pass-through authenticatorrelaying EAP messages between the Juniper Secure Connect client andthe RADIUS server.
This option is enabled by default.
Note: This option is available only if you select the CertificateBased authentication method.
Windows Logon
Enable this option to provide users to securely log onto the Windows domain before logging on to the Windows system. Theclient supports domain logon using a credential service provider afterestablishing a VPN connection to the company network.
Domain Name
Enter the system domain name on to which the Users Machinelogs.
Mode
Select one of the following options from the list tolog on to Windows domain.
Automatic—The client software transfersthe data entered here to the Microsoft logon interface (CredentialProvider) without your action.
Disconnect at Logoff
Enable this option to shut down the connection when thesystem switches to hibernation or standby mode. When the system resumesfrom hibernation or standby mode the connection has to be re-established.
Flush Credential at Logoff
Enable this option to delete username and password fromthe cache. You must reenter the username and password.
Lead Time Duration
Enter the lead time duration to initialize time betweennetwork logon and domain logon.
After the connection is set up, the Windows logon will onlybe executed after the initialization time set here has elapsed.
EAP Authentication
Enable this option to execute EAP authentication priorto the destination dialog in the credential provider. Then, systemwill ask for the necessary PIN, regardless of whether EAP will berequired for subsequent dial-in.
If this option is disabled, then EAP authentication will beexecuted after the destination selection.
Auto Dialog Open
Enable this option to select whether a dialog shouldopen automatically for connection establishment to a remote domain.
If this option is disabled, then the password and PIN for theclient will only be queried after the Windows logon.
Table 3: Fields onthe Local Gateway Page
Field
Action
Gateway is behind NAT
Enable this option when the local gateway is behind aNAT device.
NAT IP Address
Enter the public (NAT) IP address of the SRX Series device.
Note: This option is available only when
IKE ID
This field is mandatory. Enter the IKE ID in the formatuser@example.com.
External Interface
Select an outgoing interface from the list for whichthe client will connect to.
The list contains all available IP addresses if more than oneIPv4 address is configured to the specified interface. The selectedIP address will be configured as the local address under the IKE gateway.
Tunnel Interface
Select an interface from the list for the client to connectto.
Click Edit to edit the selected tunnel interface.
Pre-shared Key
Enter one of the following values of the preshared key:
ascii-text—ASCII text key.
hexadecimal—Hexadecimal key.
Note: This option is available if the authentication methodis Pre-shared Key.
Local certificate
Select a local certificate from the list.
Local certificate lists only the RSA certificates.
To add a certificate, click Import. For more informationon importing a device certificate, see Import a Device Certificate.
Note: This option is available if the authentication methodis Certificated Based.
Trusted CA/Group
Select a trusted Certificate Authority/group profilefrom the list.
To add a CA profile, click
User Authentication
This field is mandatory. Select the authentication profilefrom the list that will be used to authenticate user accessing theremote access VPN.
Click
SSL VPN Profile
Select the SSL VPN Profile from the list that will beused to terminate the remote access connections.
Click
Click Add. For more informationon adding a device certificate, see Add a Device Certificate.
To import a certificate, click OK.
Click OK.
Source NAT Traffic
This option is enabled by default.
All traffic from the Juniper Secure Connect client is NATedto the selected interface by default.
If disabled, you must ensure that you have a route from yournetwork pointing to the SRX Series devices for handling the returntraffic correctly.
Interface
Select an interface from the list through which the sourceNAT traffic pass through.
Protected Networks
Click
Create ProtectedNetworks
Zone
Select a security zone from the list that will be usedas a source zone in the firewall policy.
Global Address
Select the addresses from the Available column and thenclick the right arrow to move it to the Selected column.
Click
Edit
Select the protected network you want to edit and clickon the pencil icon.
The Edit Protected Networks page appears with editable fields.
Delete
Select the protected network you want to edit and clickon the delete icon.
The confirmation message pops up.
Click
Field
Action
Interface Unit
Enter the logical unit number.
Description
Enter a description for the logical interface.
Zone
Select a zone from the list to add it to the tunnel interface.
This zone is used in the auto-creation of the firewall policy.
Routing Instance
Select a routing instance from the list.
Note: The default routing instance, primary, refers to the maininet.0 routing table in the logical system.
Table 5: Fieldson the Create Global Address Page
Field
Action
Name
Enter a name for the global address. The name must bea unique string that must begin with an alphanumeric character andcan include colons, periods, dashes, and underscores; no spaces allowed;63-character maximum.
IP Type
Select
IPv4
IPv4 Address
Enter a valid IPv4 address.
Subnet
Enter the subnet for IPv4 address.
Table 6: IKE and IPsec Settings
Field
Action
IKE Settings
Note:
The following parameters are generated automaticallyand are not displayed in the J-Web UI:
If the authentication method is Pre-Shared Key, the IKEversion is v1, ike-user-type is shared-ike-id, and mode is Aggressive.
If the authentication method is Certificate Based, theIKE version is v2, ike-user-type is shared-ike-id, and mode is Main.
Encryption Algorithm
Select the appropriate encryption mechanism from thelist.
Default value is AES-CBC 256-bit.
Authentication Algorithm
Select the authentication algorithm from the list. Forexample, SHA 256-bit.
DH group
A Diffie-Hellman (DH) exchange allows participants togenerate a shared secret value. Select the appropriate DH group fromthe list. Default value is group19.
Lifetime Seconds
Select a lifetime duration (in seconds) of an IKE securityassociation (SA).
Default value is 28,800 seconds. Range: 180 through 86,400 seconds.
Dead Peer Detection
Enable this option to send dead peer detection requestsregardless of whether there is outgoing IPsec traffic to the peer.
DPD Mode
Select one of the options from the list:
optimized—Send probes only when there is outgoingtraffic and no incoming data traffic - RFC3706 (default mode).
probe-idle-tunnel—Send probes same as in optimizedmode and also when there is no outgoing and incoming data traffic.
always-send—Send probes periodically regardlessof incoming and outgoing data traffic.
DPD Interval
Select an interval (in seconds) to send dead peer detectionmessages. The default interval is 10 seconds. Range is 2 to 60 seconds.
DPD Threshold
Select a number from 1 to 5 to set the failure DPD threshold.
This specifies the maximum number of times the DPD messagesmust be sent when there is no response from the peer. The defaultnumber of transmissions is 5 times.
Advance Configuration(Optional)
NAT-T
Enable this option for IPsec traffic to pass througha NAT device.
NAT-T is an IKE phase 1 algorithm that is used when trying toestablish a VPN connection between two gateway devices, where thereis a NAT device in front of one of the SRX Series devices.
NAT Keep Alive
Select appropriate keepalive interval in seconds. Range:1 to 300.
If the VPN is expected to have large periods of inactivity,you can configure keepalive values to generate artificial trafficto keep the session active on the NAT devices.
IKE Connection Limit
Enter the number of concurrent connections that the VPNprofile supports.
Range is 1 through 4294967295.
When the maximum number of connections is reached, no more remoteaccess user (VPN) endpoints attempting to access an IPsec VPN canbegin Internet Key Exchange (IKE) negotiations.
IKEv2 Fragmentation
This option is enabled by default. IKEv2 fragmentationsplits a large IKEv2 message into a set of smaller ones so that thereis no fragmentation at the IP level. Fragmentation takes place beforethe original message is encrypted and authenticated, so that eachfragment is separately encrypted and authenticated.
Note: This option is available if the authentication methodis Certificated Based.
IKEv2 Fragment Size
Select the maximum size, in bytes, of an IKEv2 messagebefore it is split into fragments.
The size applies to IPv4 message. Range: 570 to 1320 bytes.
Default value is 576 bytes.
Note: This option is available if the authentication methodis Certificated Based.
IPsec Settings
Note: The authentication method is Pre-Shared Key or CertificateBased, it automatically generates protocol as ESP.
Encryption Algorithm
Select the encryption method. Default value is AES-GCM256-bit.
Authentication Algorithm
Select the IPsec authentication algorithm from the list.For example, HMAC-SHA-256-128.
Note: This option is available when the encryption algorithmis not gcm.
Perfect Forward Secrecy
Select Perfect Forward Secrecy (PFS) from the list. Thedevice uses this method to generate the encryption key. Default valueis group19.
PFS generates each new encryption key independently from theprevious key. The higher numbered groups provide more security, butrequire more processing time.
Note: group15, group16, and group21 support only the SRX5000line of devices with an SPC3 card and junos-ike package installed.
Lifetime Seconds
Select the lifetime (in seconds) of an IPsec securityassociation (SA). When the SA expires, it is replaced by a new SAand security parameter index (SPI) or terminated. Default is 3,600seconds. Range: 180 through 86,400 seconds.
Lifetime Kilobytes
Select the lifetime (in kilobytes) of an IPsec SA. Defaultis 256kb. Range: 64 through 4294967294.
Advanced Configuration
Anti Replay
IPsec protects against VPN attack by using a sequenceof numbers built into the IPsec packet—the system does not accepta packet with the same sequence number.
This option is enabled by default. The Anti-Replay checks thesequence numbers and enforce the check, rather than just ignoringthe sequence numbers.
Disable Anti-Replay if there is an error with the IPsec mechanismthat results in out-of-order packets, which prevents proper functionality.
Install Interval
Select the maximum number of seconds to allow for theinstallation of a rekeyed outbound security association (SA) on thedevice. Select a value from 1 to 10 seconds.
Idle Time
Select the idle time interval. The sessions and theircorresponding translations time out after a certain period of timeif no traffic is received. Range is 60 to 999999 seconds.
DF Bit
Select how the device handles the Don't Fragment (DF)bit in the outer header:
clear—Clear (disable) the DF bit from the outerheader. This is the default.
copy—Copy the DF bit to the outer header.
set—Set (enable) the DF bit in the outer header.
Copy Outer DSCP
This option enabled by default. This enables copyingof Differentiated Services Code Point (DSCP) (outer DSCP+ECN) fromthe outer IP header encrypted packet to the inner IP header plaintext message on the decryption path. Enabling this feature, afterIPsec decryption, clear text packets can follow the inner CoS (DSCP+ECN)rules.
Related Documentation

Field	Action
Default Profile	Enable this option to use the configured VPN name asremote access default profile. Note: This option is not available if the default profile isconfigured. You must enable the default profile. If not enabled, configurethe default profile under IPsec VPN > Remote Access VPN.
Connection Mode	Select one of the following options from the list toestablish the Juniper Secure Connect client connection: Always—You are automatically connectedto the VPN tunnel every time you log in. The default connection mode is Manual.
SSL VPN	Enable this option to establish SSL VPN connection fromthe Juniper Secure Connect Client to the SRX Series device. By default this option is enabled. Note: This is a fallback option when IPsec ports are not reachable.
Biometric authentication	Enable this option to authenticate the client systemusing unique configured methods. An authentication prompt is displayed when you connect in theclient system. The VPN connection will only be initiated after successfulauthentication through the method configured for WindowsHello (fingerprint recognition, face recognition, PIN entry,and so on). Windows Hello must be preconfigured onthe client system if the Biometric authentication option is enabled.
Dead Peer Detection	Enable the dead peer detection (DPD) option to allowthe Juniper Secure Connect client to detect if the SRX Series deviceis reachable. Disable this option to allow the Juniper Secure Connect clientto detect till the SRX Series device connection reachability is restored. This option is enabled by default.
DPD Interval	Enter the amount of time that the peer waits for trafficfrom its destination peer before sending a dead-peer-detection (DPD)request packet. The Range is 2 through 60 seconds and default is 60seconds.
DPD Threshold	Enter the maximum number of unsuccessful dead peer detection(DPD) requests to be sent before the peer is considered unavailable.The Range is 1 through 5 and default is 5.
Certificates	Enable Certificates to configure certificate optionson Secure Client Connect. Note: This option is available only if you select the CertificateBased authentication method.
Expiry Warning	Enable this option to display the certificate expirywarning on the Secure Connect Client. This option is enabled by default. Note: This option is available only if you enable Certificates.
Warning Interval	Enter the interval (days) at which the warning to bedisplayed. Range is 1 through 90. Default value is 60. Note: This option is available only if you enable Certificates.
Pin Req Per Connection	Enable this option to enter the certificate pin on veryconnection. This option is enabled by default. Note: This option is available only if you enable Certificates.
EAP-TLS	Enable this option for the authentication process. IKEv2requires EAP for user authentication. SRX Series device cannot actas an EAP server. An external RADIUS server must be used for IKEv2EAP to do the EAP authentication. SRX will act as a pass-through authenticatorrelaying EAP messages between the Juniper Secure Connect client andthe RADIUS server. This option is enabled by default. Note: This option is available only if you select the CertificateBased authentication method.
Windows Logon	Enable this option to provide users to securely log onto the Windows domain before logging on to the Windows system. Theclient supports domain logon using a credential service provider afterestablishing a VPN connection to the company network.
Domain Name	Enter the system domain name on to which the Users Machinelogs.
Mode	Select one of the following options from the list tolog on to Windows domain. Automatic—The client software transfersthe data entered here to the Microsoft logon interface (CredentialProvider) without your action.
Disconnect at Logoff	Enable this option to shut down the connection when thesystem switches to hibernation or standby mode. When the system resumesfrom hibernation or standby mode the connection has to be re-established.
Flush Credential at Logoff	Enable this option to delete username and password fromthe cache. You must reenter the username and password.
Lead Time Duration	Enter the lead time duration to initialize time betweennetwork logon and domain logon. After the connection is set up, the Windows logon will onlybe executed after the initialization time set here has elapsed.
EAP Authentication	Enable this option to execute EAP authentication priorto the destination dialog in the credential provider. Then, systemwill ask for the necessary PIN, regardless of whether EAP will berequired for subsequent dial-in. If this option is disabled, then EAP authentication will beexecuted after the destination selection.
Auto Dialog Open	Enable this option to select whether a dialog shouldopen automatically for connection establishment to a remote domain. If this option is disabled, then the password and PIN for theclient will only be queried after the Windows logon.

Field	Action
Gateway is behind NAT	Enable this option when the local gateway is behind aNAT device.
NAT IP Address	Enter the public (NAT) IP address of the SRX Series device. Note: This option is available only when	IKE ID	This field is mandatory. Enter the IKE ID in the formatuser@example.com.
External Interface	Select an outgoing interface from the list for whichthe client will connect to. The list contains all available IP addresses if more than oneIPv4 address is configured to the specified interface. The selectedIP address will be configured as the local address under the IKE gateway.
Tunnel Interface	Select an interface from the list for the client to connectto. Click Edit to edit the selected tunnel interface.
Pre-shared Key	Enter one of the following values of the preshared key: ascii-text—ASCII text key. hexadecimal—Hexadecimal key. Note: This option is available if the authentication methodis Pre-shared Key.
Local certificate	Select a local certificate from the list. Local certificate lists only the RSA certificates. To add a certificate, click Import. For more informationon importing a device certificate, see Import a Device Certificate. Note: This option is available if the authentication methodis Certificated Based.
Trusted CA/Group	Select a trusted Certificate Authority/group profilefrom the list. To add a CA profile, click	User Authentication	This field is mandatory. Select the authentication profilefrom the list that will be used to authenticate user accessing theremote access VPN. Click	SSL VPN Profile	Select the SSL VPN Profile from the list that will beused to terminate the remote access connections. Click Click Add. For more informationon adding a device certificate, see Add a Device Certificate. To import a certificate, click OK. Click OK.
Source NAT Traffic	This option is enabled by default. All traffic from the Juniper Secure Connect client is NATedto the selected interface by default. If disabled, you must ensure that you have a route from yournetwork pointing to the SRX Series devices for handling the returntraffic correctly.
Interface	Select an interface from the list through which the sourceNAT traffic pass through.
Protected Networks	Click	Create ProtectedNetworks
Zone	Select a security zone from the list that will be usedas a source zone in the firewall policy.
Global Address	Select the addresses from the Available column and thenclick the right arrow to move it to the Selected column. Click	Edit	Select the protected network you want to edit and clickon the pencil icon. The Edit Protected Networks page appears with editable fields.
Delete	Select the protected network you want to edit and clickon the delete icon. The confirmation message pops up. Click
Field	Action
Interface Unit	Enter the logical unit number.
Description	Enter a description for the logical interface.
Zone	Select a zone from the list to add it to the tunnel interface. This zone is used in the auto-creation of the firewall policy.
Routing Instance	Select a routing instance from the list. Note: The default routing instance, primary, refers to the maininet.0 routing table in the logical system.

Field	Action
Name	Enter a name for the global address. The name must bea unique string that must begin with an alphanumeric character andcan include colons, periods, dashes, and underscores; no spaces allowed;63-character maximum.
IP Type	Select	IPv4
IPv4 Address	Enter a valid IPv4 address.
Subnet	Enter the subnet for IPv4 address.

Field	Action
IKE Settings Note: The following parameters are generated automaticallyand are not displayed in the J-Web UI: If the authentication method is Pre-Shared Key, the IKEversion is v1, ike-user-type is shared-ike-id, and mode is Aggressive. If the authentication method is Certificate Based, theIKE version is v2, ike-user-type is shared-ike-id, and mode is Main.
Encryption Algorithm	Select the appropriate encryption mechanism from thelist. Default value is AES-CBC 256-bit.
Authentication Algorithm	Select the authentication algorithm from the list. Forexample, SHA 256-bit.
DH group	A Diffie-Hellman (DH) exchange allows participants togenerate a shared secret value. Select the appropriate DH group fromthe list. Default value is group19.
Lifetime Seconds	Select a lifetime duration (in seconds) of an IKE securityassociation (SA). Default value is 28,800 seconds. Range: 180 through 86,400 seconds.
Dead Peer Detection	Enable this option to send dead peer detection requestsregardless of whether there is outgoing IPsec traffic to the peer.
DPD Mode	Select one of the options from the list: optimized—Send probes only when there is outgoingtraffic and no incoming data traffic - RFC3706 (default mode). probe-idle-tunnel—Send probes same as in optimizedmode and also when there is no outgoing and incoming data traffic. always-send—Send probes periodically regardlessof incoming and outgoing data traffic.
DPD Interval	Select an interval (in seconds) to send dead peer detectionmessages. The default interval is 10 seconds. Range is 2 to 60 seconds.
DPD Threshold	Select a number from 1 to 5 to set the failure DPD threshold. This specifies the maximum number of times the DPD messagesmust be sent when there is no response from the peer. The defaultnumber of transmissions is 5 times.
Advance Configuration(Optional)
NAT-T	Enable this option for IPsec traffic to pass througha NAT device. NAT-T is an IKE phase 1 algorithm that is used when trying toestablish a VPN connection between two gateway devices, where thereis a NAT device in front of one of the SRX Series devices.
NAT Keep Alive	Select appropriate keepalive interval in seconds. Range:1 to 300. If the VPN is expected to have large periods of inactivity,you can configure keepalive values to generate artificial trafficto keep the session active on the NAT devices.
IKE Connection Limit	Enter the number of concurrent connections that the VPNprofile supports. Range is 1 through 4294967295. When the maximum number of connections is reached, no more remoteaccess user (VPN) endpoints attempting to access an IPsec VPN canbegin Internet Key Exchange (IKE) negotiations.
IKEv2 Fragmentation	This option is enabled by default. IKEv2 fragmentationsplits a large IKEv2 message into a set of smaller ones so that thereis no fragmentation at the IP level. Fragmentation takes place beforethe original message is encrypted and authenticated, so that eachfragment is separately encrypted and authenticated. Note: This option is available if the authentication methodis Certificated Based.
IKEv2 Fragment Size	Select the maximum size, in bytes, of an IKEv2 messagebefore it is split into fragments. The size applies to IPv4 message. Range: 570 to 1320 bytes. Default value is 576 bytes. Note: This option is available if the authentication methodis Certificated Based.
IPsec Settings Note: The authentication method is Pre-Shared Key or CertificateBased, it automatically generates protocol as ESP.
Encryption Algorithm	Select the encryption method. Default value is AES-GCM256-bit.
Authentication Algorithm	Select the IPsec authentication algorithm from the list.For example, HMAC-SHA-256-128. Note: This option is available when the encryption algorithmis not gcm.
Perfect Forward Secrecy	Select Perfect Forward Secrecy (PFS) from the list. Thedevice uses this method to generate the encryption key. Default valueis group19. PFS generates each new encryption key independently from theprevious key. The higher numbered groups provide more security, butrequire more processing time. Note: group15, group16, and group21 support only the SRX5000line of devices with an SPC3 card and junos-ike package installed.
Lifetime Seconds	Select the lifetime (in seconds) of an IPsec securityassociation (SA). When the SA expires, it is replaced by a new SAand security parameter index (SPI) or terminated. Default is 3,600seconds. Range: 180 through 86,400 seconds.
Lifetime Kilobytes	Select the lifetime (in kilobytes) of an IPsec SA. Defaultis 256kb. Range: 64 through 4294967294.
Advanced Configuration
Anti Replay	IPsec protects against VPN attack by using a sequenceof numbers built into the IPsec packet—the system does not accepta packet with the same sequence number. This option is enabled by default. The Anti-Replay checks thesequence numbers and enforce the check, rather than just ignoringthe sequence numbers. Disable Anti-Replay if there is an error with the IPsec mechanismthat results in out-of-order packets, which prevents proper functionality.
Install Interval	Select the maximum number of seconds to allow for theinstallation of a rekeyed outbound security association (SA) on thedevice. Select a value from 1 to 10 seconds.
Idle Time	Select the idle time interval. The sessions and theircorresponding translations time out after a certain period of timeif no traffic is received. Range is 60 to 999999 seconds.
DF Bit	Select how the device handles the Don't Fragment (DF)bit in the outer header: clear—Clear (disable) the DF bit from the outerheader. This is the default. copy—Copy the DF bit to the outer header. set—Set (enable) the DF bit in the outer header.
Copy Outer DSCP	This option enabled by default. This enables copyingof Differentiated Services Code Point (DSCP) (outer DSCP+ECN) fromthe outer IP header encrypted packet to the inner IP header plaintext message on the decryption path. Enabling this feature, afterIPsec decryption, clear text packets can follow the inner CoS (DSCP+ECN)rules.