SSL-VPN Roadwarrior

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• • Tab General → Button Add TAP }}

Configuration of SSL-VPN Roadwarrior connections

Last adaptation to the version: 12.4.0

New:

• New field: "Allowed ciphers for auto-negotiation"
• The default value in the field "Max Clients" is now shown
• Layout adjustments
• Renegotiation can be set to 12 hours as of v12.4.1

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This article refers to a Resellerpreview

12.2.2 12.2 11.8.7 11.7.1 11.7 11.6.12

Access: UTM-IP:Port or UTM-URL:Port
Port as configured at Network / Appliance Settings / Webserver
Default-Port: 11115
i.e.: https://utm.ttt-point.de:11115
Default: https://192.168.175.1:11115 → VPN →SSL-VPN

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Introduction

A roadwarrior connection links individual hosts to the local network. This allows, for example, a field worker to connect to the headquarters network.
SSL-VPN uses the TLS/SSL standard to encrypt the connection.

Multiple clients can be connected with a SSL-VPN Roadwarrior connection on the UTM.

There is a separate article for creating certificates on the UTM: Certificates

Preparations

A CA, a server certificate and a user certificate are required for setting up the roadwarrior.
These certificates can also be created during setup if necessary.

Internal hostname resolution in SSL-VPN

If servers in the SSL-VPN are to be accessible to Roadwarrior under their host name, the following settings are required:

Push DNS/WINS

In order for DNS/WINS to be transmitted, the configured VPN connection must be edited and enabled in the Advanced tab.

Enter the IP of the DNS server in the UTM network as the primary DNS server / WINS server.

In order for DNS/WINS to be transmitted, the configured VPN connection must be edited and enabled in the Advanced tab.

Search Domain

If available, enter domain.

Predefine Search Domain

Block Outside DNS

For some Windows 10 clients, it may be necessary to set the "block-outside-dns" option in the configuration of the SSL-VPN client:
Right click on the desired connection in the Securepoint SSL-VPN Client, menu  Settings Advanced button tab OS Entry DNS  Block Outside DNS

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Roadwarrior configuration

Setup Wizard

After the login on the firewall's administration interface (by default: https://192.168.175.1:11115), the setup wizard can be called up with → VPN →SSL-VPN Button Add SSL-VPN connection.

Step 1
In installation step 1, the connection type is selected. The following connections are available. Roadwarrior Server Site to Site Server Site to Site Client For the configuration of the Roadwarrior Server this one is selected.
Step 2
If IPv6 is to be used in the source and destination network, this must be enabled here.
Step 3 Local settings for the Roadwarrior server can be made in step 3.
Caption Value Description Name: RW-Securepoint Distinctive label, freely selectable Protocol: UDP Desired protocol Port: 1194 Default port for the first SSL-VPN connection. May not be used for any other purpose. For further connections, the next free port is selected. Server certificate: Server certificate Selection of the certificate with which the server authenticates itself. If there is no server certificate yet, this (and if necessary also a CA) can be created in the certificate management. Call with Creation of a CA in the tab CA with the button Add CA Create a server certificate in the Certificates tab using the Add Certificate. Please note: activate Server certificate: Enable Creation of the client certificate with the button Add certificate A separate user certificate should be created for each user . Both certificates (server CS and client CC) must be created with the same CA! The client certificate and the associated CA are also needed to configure the remote peer (client). They must be exported using the button. Further notes in the wiki article on the use of Certificates. Share server networks » ✕192.168.175.0/24 Network IP for networks behind the UTM that should be reachable via the SSL-VPN connection (as specified in the wizard in step 3) can be edited.
Step 4
In installation step 4, the transfer network for the Roadwarrior is entered. The transfer network can be freely selected, but must be otherwise unused on the UTM.
Step 5
The user authentication is selected in the last step. After that, the setup wizard can be completed. None = Authentication only via the certificates. Local = Local users and AD groups. Radius = Radius Server.
Completion
In the SSL-VPN overview all configured connections are displayed. In order for the connection to become active, the SSL-VPN service must be restarted: Restart This will interrupt all SSL-VPN tunnels! Only one Roadwarrior server is needed to connect multiple VPN users! In order for DNS/WINS to be transmitted, the configured VPN connection must be edited and enabled in the Advanced tab.

Tab: General
Caption	Value	Description
Name:	RW Default	Name of the SSL connection
Interface:	tun1	Used interface
Modus:	Server	Depending on the connection type (as selected in step 1 of the wizard)
Protocol:	UDP (Default) TCP	Select preferred protocol (UDP and TCP can be limited to IPv4 or IPv6 respectively).
Port:	1194	Default port for the first SSL-VPN connection. May not be used for any other purpose. For further connections, the next free port is selected.
Authentication:	NONE (Default) LOCAL RADIUS	Select appropriate authentication method
Certificate:	cs-ttt-point	The used certificate can be changed here
Cipher for data connections:	Default	Default settings of OpenSSL are used. All remote stations must use the same cipher!
	BF-CBC DES-EDE-CBC DES-EDE3-CBC CAST5-CBC AES-128-CBC AES-192-CBC AES-256-CBC AES-128-GCM AES-192-GCM AES-256-GCM
Hash for data connection:	Default	Default settings of OpenSSL are used. All remote stations must use the same hash procedure!
	SHA1 SHA224 SHA256 SHA384 SHA512 whirlpool
New as of 12.4 Allowed ciphers for automatic negotiation (NCP):	×AES-192-CBC	Individual ciphers can be selected from a list
IPv4 Pool:	192.168.192.0/24	Enter pool address
IPv6 Pool:	/64	Enter pool address
Share server networks:		Network IP for networks behind the UTM that should be reachable via the SSL-VPN connection (as specified in the wizard in step 3) can be edited.
Search Domain:		If available, enter domain.
Renegotiation:	Never 1 Hour (Default) 2 Hous 4 Hous 8 Hous 12 Hous	Time period from which the connection will be rebrokered.
Save		Saves the settings
Extended
MTU:	1500	Maximum transmission unit of the largest packet (byte)
Maximum Clients:	1024	Maximum number of clients If no value is specified, the default value of 1024 applies
Transmit DNS:	No	Allows DNS transmission
Transmit WINS:	No	Allows the WINS transmission
Multihome:	On	Allows the use of multiple default routes
LZO:	Of	LZO compression After changing this option, the corresponding client remote stations must adjust their configuration!
Deaktiviert:	No
Pass TOS:	Of	Allows forwarding of TOS packets
Ping Intervall:	10 Seconds	Interval of the ping requests
Ping waiting time:	120 Seconds
Outgoing buffer size:	65536 Bytes
Incoming buffer size:	65536 Bytes
Replay window sequence size:	64
Replay window waiting time:	15 Seconds
Save		Saves the settings

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Policy

Implied rules

Under → Firewall →Implied rulesTab VPN the protocol used for the connection can be enabled.

In the example On SSL-VPN UDP

This Implicit rule frees the ports used for SSL-VPN connections on the WAN interface.
If the user is to download the client from the user interface, this must be additionally enabled here:
On User Interface Portal

If necessary, the user interface must be placed on a different port, if port 443 has been forwarded to an internal server.

Network objects

A TUN interface was created when the connection was set up. It automatically receives the first IP from the transfer network configured in the connection and a zone "vpn-ssl-<servername>".

The Roadwarrior clients will receive an IP from this network and will be located in this zone.
To grant the roadwarriors access to your own network, a network object must be created.

Caption	Value	Description	Network object for the tunnel network
Name:	SSL-VPN-RW-Network	Distinctive label, freely selectable
Type:	VPN network	Select suitable type
Adress:	192.168.192.0/24	The network IP that was specified as the tunnel pool in step 4.
Zone:	vpn-ssl-RW-Securepoint	The zone over which the tunnel network is addressed.
Groups:		Optional assignment to network groups
Save		Saves the settings

Port filter rule

Menu → Firewall →Port FilterTab Port Filter Button Add Rule A rule allows RW clients to access the local network:
General
Source	SSL-VPN-RW-Network	Inbound rule
Destination	internal-network	The destination must be internal-network
Service	ms-rdp	Only services that are actually needed should be released!
Action	Accept

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Creating users and groups

Group

SSL-VPN settings for the group

Under → Authentication →UsersTab Group Button + Add Group.
The following authorisations must be given:

• On Userinterface
• On SSL-VPN

Settings in SSL-VPN tab
Client downloadable in the user interface:	On	Per default over the port 443, so e.g. under https://192.168.75.1 accessible
SSL-VPN connection:	RW-Securepoint	Select just created connection
Client certificate:	Client certificate	Selection of the client certificate described in Step 3 of the setup wizard. Server and client certificate must be created with the same CA!
Remote Gateway:	192.0.2.192	The remote gateway is the address of the external interface. This address must be accessible external.
Redirect Gateway:	Of	When activated, requests from roadwarrior clients to the Internet or networks outside the VPN are also redirected via the local gateway. As a result, these connections also benefit from the protection of the UTM.
Available in the port filter:	Ein	Enables Identity-Based Firewall (IBF) for SSL-VPN

User

If no group assignment was made in the previous step (create a group) in the Directory Service tab, each user must also be created on the UTM.

→ Authentication →UserTab User Button Add User or Edit User .

General			SSL-VPN settings for the users
Groups	×RW-SSL-VPN	The user must be assigned the previously created group.
SSL-VPN
Use settings from the group	On	If settings have already been made for the group, these can be adopted here instead of individual values.
Installer Portable Client Configuration	If the information has been saved, the corresponding files can already be downloaded by the administrator at this point.
Further information on users can be found in the article on User Management.

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The SSL-VPN Client

Downloading the SSL-VPN client in the user interface

Userinterface

For users who wish to connect to the UTM via SSL-VPN, the appliance provides a pre-configured SSL-VPN client:
.

• This client contains the configuration files and all required certificates.
• Logon to the user interface of the UTM by default via port 443, e.g. at https://192.168.75.1.
• The user interface is reached via the internal interface of the Securepoint appliance.
  

Access from external users is only possible if the Implied SSL rule is enabled under → Firewall →Implied Rules, which allows access from the Internet to the external interface via HTTPS.

The client is offered as:

• SSL-VPN Client Installer
  
  • The installation must be performed with administrator rights.
  • Required processor architecture: x86 / x64

• SSL-VPN Portable Client
  • The portable version can be copied to a USB stick, for example, and can thus be run on other computers.
  • This requires administration rights, as a virtual TAP device must be installed and routes set.
  • Required processor architecture: x86 / x64

• Configuration and certificate
  • For use in other SSL-VPN clients
  • In addition to the SSL-VPN client, the compressed folders contain
  • a configuration file
  • the CA and client certificates
  • and a driver for the virtual TAP network interface.
  • To install the virtual TAP interface, the user needs administrator rights on the machine being used.

As of Windows 10, older SSL-VPN clients < V2 can no longer be used

Installation: Hints for the installation can be found on our wiki page for the VPN client.

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Establish SSL-VPN connection as client

Active SSL-VPN connection

Double-click on the lock icon in the taskbar to open the SSL-VPN client.
Start the connection by clicking

Multiple VPN servers as targets for one connection

In the settings of a connection under Advanced/Remote additional VPN servers with IP or hostname can be stored as destination.

• Right mouse click on the connection
• Context menu Settings

• Button Advanced

• IP: utm1.anyideas.de
• Port: 1194

Enter host name or IP and port used
Apply details with  Add 
Close window with OK.

Confirm UAC user accounts message.

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Use multiple VPN profiles

Multiple VPN profiles can be imported and used at the same time.

• Left click on the gear icon in the client window
• Context menu Import

• By clicking ... in the
  source file:
  section, a file in .ovpn format can be selected.
• In the
  Import as:
  section, either the filename or any custom identifier can be selected, which will then be displayed in the client window for that connection.
• Finish with the Import button.

• If several VPN profiles are to be used simultaneously, additional TAP drivers must be added:
  • Left click on the cogwheel symbol
  • Menu {spc

• By clicking ... in the
  source file:
  section, a file in .ovpn format can be selected.
• In the
  Import as:
  section, either the filename or any custom identifier can be selected, which will then be displayed in the client window for that connection.
• Finish with the Import button.

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Notes

Encryption

By default, an AES128-CBC method is used. The encryption method can be customized in the server or/and client profile.

Adjustment of the default cipher as of v12.2.2

As of v12.2.2, the Default setting of the Cipher for data connection no longer includes Blowfish-CBC.
If the client uses this cipher and is not able to handle NCP, with which the cipher is negotiated automatically, no connection is established. The cipher must be adjusted.
It is strongly recommended to stop using the BF-CBC cipher because it is considered not secure.
If the BF-CBC cipher is to be used anyway, it can be selected explicitly.
Adjustment on the UTM with the button of the respective connection in the General tab in the Cipher for data connection field.

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Cipher and hash with default settings

Not compatible with Blowfish

Cipher with Blowfish compatible settings

Not recommended

Recommended setting

The parameters must be identical on the server and client side. Otherwise data transfer is not possible.

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Hash method

By default, a SHA256 hash method is used. The hash method can be customized in the server or/and client profile.

The parameters must be identical on the server and client side. Otherwise data transfer is not possible.

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QoS

For the VPN connection, the TOS fields for automatic QoS can be set in the packets. This setting can be enabled in the VPN connection settings under "Advanced".

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Note on upstream routers/modems

There are always problems with the stability of the connection if a router/modem in front of the appliance also has an active firewall. Please do not use any firewall functionality on these devices.

It must be ensured that the required ports are forwarded.

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IPv6 for incoming connections

In the settings of the roadwarrior server , the protocol UDP6 or TCP6 for IPv6 can be activated under General / Protocol.

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Troubleshooting

For advice on troubleshooting SSL-VPN, see the Troubleshooting Guide SSL-VPN (pdf document).