We use cookies on our website to ensure we provide you with the best experience on our website. By using our website, you agree to the use of cookies for analytics and personalized content.This website uses cookies. More Information
It seems like your browser didn't download the required fonts. Please revise your security settings and try again.
Barracuda CloudGen Firewall

General Settings

  • Last updated on

The VPN service relies on several settings necessary for operation. The parameters are grouped into the following subsections:

Service
SettingValue(s)
*=default
Description
Listen on port 443Deactivated

The TCP tunnel transport usually uses TCP connections on port 691, the default.
However, if a connection is necessary through SOCKS4 or HTTP proxies, port 443 can be used as an alternative.

Port 443 can be used only by one service. If this port is redirected to another machine by the firewall service or if an SSL VPN is running, disable port 443 for client-to-site VPN connections.
Maximum number of tunnels

*Auto
1
64
512
2048
8192

This value sets the maximum number of concurrent client-to-site and site-to-site tunnels accepted by the VPN service.
CRL poll time [min.]0The time interval in minutes for fetching the Certificate Revocation List. Entering 0 results in a poll time of 15 minutes.
Site to Site authentication

Selected

Deselected

Typically, a tunnel registers itself at the firewall by creating an auth.db entry with the tunnel network and the tunnel credentials. You can then create an access rule with the tunnel name or credentials as a condition. This feature is rarely used.
Add VPN routes to main routing table

Selected

Deselected

Add the routes for published VPN networks to the main routing table with a metric of 10.
Allow concurrent user sessions

Selected

Deselected

Add the routes for published VPN networks to the main routing table with a metric of 10. For more information, see Authentication, Encryption, Transport, IP Version and VPN Routing.
Use Perfect Forward SecrecyEnforced
Yes
No

Enable perfect forward secrecy and elliptic curve cryptography for TINA site-to-site VPN tunnels. For more information, see Authentication, Encryption, Transport, IP Version and VPN Routing.

Accounting information storage time [days]14

Stores information on client-to-site connections and site-to-site VPN tunnels using the TINA VPN protocol in the /VPNservice/VPN log file. For client-to-site VPN connections, both the login and logout are logged. To disable this feature, set to 0. This information is also used by the Report Creator. For more information, see Barracuda Report Creator.

Example login log entry:

Session PGRP-AUTH-user1-b607769a27fdf6e: Accounting LOGIN - user=user1 IP=REMOTE_IP start="2016/05/27 15:00:00"

Example logout log entry:

Session PGRP-AUTH-user1-b607769a27fdf6e: Accounting LOGOUT - user=user1 IP=REMOTE_IP start="2016/05/27 15:00:00" duration=0:03:36 inBytes=0 outBytes=0 lastOS="Android 6.0" lastClient="Android 2.0.1"

Send SDWAN data to Control CenterYes
Auto
No
Defines how SD-WAN data is propagated to the Control Center.
Use Self-Signed Certificates

Selected

Deselected

Select the check box to use self-signed certificates.
Certificate

-

-

Click the "certificate" icon to edit the current certificate.

Click the "pen" icon to clear, import, or export the certificate.

Private Key

-

-

Click the "add" icon to create a new private key.

Click the blue "up arrow" icon to clear, import, or export the certificate.

TINA
SettingValue(s)
*=default
Description
Handshake Timeout [sec]10Set the time in seconds until a handshake request times out.
Tunnel HA Sync During an HA takeover, the initialization of all VPN tunnels and transports requires a very CPU-intensive RSA handshake procedure. As long as less than approximately 200 tunnels and transports are terminated, this initialization happens very quickly and does not decrease overall system performance. Due to real-time synchronization to the HA partner unit, the system load during a takeover can be decreased, providing faster tunnel re-establishment.
Pending session limit

Selected

Deselected

Enforces a limit of five sessions. Additional session requests are dropped.
Prebuild cookies on startup 

Pre-builds the cookies when the VPN service is started. This can slow the VPN service startup but increases the speed of tunnel builds.

Typically, cookies are built on demand while a VPN tunnel is initiated.

Enable this setting to prevent high system load on CloudGen Firewalls that are concentrating a large number of VPN tunnels. High system load caused by the VPN service can occur if a large number of VPN tunnels are established simultaneously after a reboot or Internet Service Provider outage.

Global TOS copy

Selected

*Deselected

Enables the Type of Service (ToS) flag for site-to-site tunnels. By default, the ToS flag is globally disabled (setting: Off). Individual tunnel ToS policies override global policy settings.
Global replay window size [packets]256

If ToS policies assigned to VPN tunnels or transport packets are not forwarded instantly according to their sequence number, you can configure the replay window size for sequence integrity assurance to avoid IP packet "replaying." The window size specifies a maximum number of IP packets that can be on hold until it is assumed that packets have been sent repeatedly and sequence integrity has been violated. Individual window size settings are configurable per tunnel and transport, overriding global policy settings. To specify that tunnel and transport settings should be used, enter 0 (default).

To view the specified replay window size, double-click the tunnel on the VPN page to open the Transport Details window (attribute: transport_replayWindow).

Allow Dynamic Mesh

Selected

Deselected

Enable Dynamic Mesh for this VPN service. For more information, see Dynamic Mesh VPN Networks.
Acccess Control Service
SettingValue(s)
*=default
Description
IP Address The IP address of the Access Control Service.
Sync Authentication Trust Zone

Selected

Deselected

If activated, propagates authentication information to systems in the same trustzone.
Last updated on