Welcome to the Web Security Appliance

First Published: June 9, 2021

Last Updated: November 30, 2021

About Web Security Appliance

The Cisco Web Security Appliance intercepts and monitors Internet traffic and applies policies to help keep your internal network secure from malware, sensitive data loss, productivity loss, and other Internet-based threats.

What’s New

What’s New In AsyncOS 14.1.0-032 LD (Limited Deployment)

This release contains a number of bug fixes; see the Known and Fixed Issues in Release 14.1.0-032 for additional information.

Feature

Description

Cisco Umbrella Seamless ID

The Cisco Umbrella Seamless ID feature enables the appliance to pass the user identification information to the Cisco Umbrella Secure Web Gateway (SWG) after successful authentication. The Cisco Umbrella SWG checks the user information in the Active Directory based on the authenticated identification information received from the Web Security Appliance. The Cisco Umbrella SWG considers the user as authenticated and provides access to the user based on the defined security policies.

The Web Security Appliance passes the user identification information to the Cisco Umbrella SWG using the HTTP headers; X-USWG-PKH, X-USWG-SK, and X-USWG-Data.

Note 

  • The Cisco Umbrella Seamless ID headers overwrite the headers with the same names on the Web Security Appliance, if any.

  • The Cisco Umbrella Seamless ID feature supports authentication scheme with Active Directory only. This feature does not support LDAP, Cisco Identity Services Engine (ISE), and Cisco Context Directory Agent (CDA).

  • The Cisco Umbrella SWG does not support FTP and SOCKS traffic.

  • Ensure that the Web Security Appliance and the Cisco Umbrella SWG have the same timezone across enterprises. If the time difference between the Cisco Umbrella SWG and the Web Security Appliance is more than four minutes, the Umbrella Seamless ID headers are not configured on the Cisco Umbrella SWG.

See “Cisco Umbrella Seamless ID” section in the user guide.

Prerequisites:

On the Cisco Umbrella SWG web user interface, perform the following tasks:

  • Register Web Security Appliance public IP address as network deployment.

  • Configure the access policies and access rules with users and groups (Policies > Management > All Policies).

On the Web Security Appliance user interface, perform the following tasks:

  • Add the Cisco Umbrella SWG root certificate to Web Security Appliances trusted certificate (Network > Certificate Management).

  • Configure TCP Anycast IP (146.112.255.50) in Cisco Umbrella Seamless ID profile page (Web Security Manager > Cisco Umbrella Seamless ID > Edit Settings).

  • Configure routing policies (Web Security Manager > Routing Policies) with Cisco Umbrella Seamless ID profile with the appropriate port as upstream proxy group.

  • Enable AD Authentication in Web Security Appliance policies.

  • Enable decryption for Authentication.

The AsyncOS 14.1 for Cisco Web Security Appliance supports TLSv1.2 session resumption in client and server.

Changes in Behavior in AsyncOS 14.1.0-047 LD (Limited Deployment)–Refresh

Cisco Umbrella Seamless ID Enhancements

The Web Security Appliance retrieves the UPN value from the active directory for basic authentication of the users and sends the correct UPN value to Cisco Umbrella Seamless ID. For this functionality to work, you must assign all the active directory users with a default or customized UPN value.

For a successful log in, the basic authentication log in should be done in the following format: DomainName\UserName.

Changes in Behavior in AsyncOS 14.1.0-041 LD (Limited Deployment)–Refresh

Cisco Umbrella Seamless ID Enhancements

The Web Security Appliance retrieves the UPN value for the authenticated user from the active directory and allows the Cisco Umbrella Seamless ID to apply the correct web policies for the users. For this functionality to work, you must assign all the active directory users with default or customized UPN values.

Accessing the New Web Interface

The new web interface provides a new look for monitoring reports and tracking web services. You can access the new web interface in the following way:

  • Log in to the legacy web interface and click the Web Security appliance is getting a new look. Try it!! link. When you click this link, it opens a new tab in your web browser and goes to https://wsa01-enterprise.com:<trailblazer-https-port>/ng-login, where wsa01-enterprise.com is the appliance host name and <trailblazer-https-port> is the trailblazer HTTPS port configured on the appliance for accessing the new web interface.

Important!

  • You must log in to the legacy web interface of the appliance.

  • Ensure that your DNS server can resolve the hostname of the appliance that you specified.

  • By default, the new web interface needs TCP ports 6080, 6443, and 4431 to be operational. Ensure that these ports are not blocked in the enterprise firewall.

  • The default port for accessing new web interface is 4431. This can be customized using the trailblazerconfig CLI command. For more information about the trailblazerconfig CLI command, see “Command Line Interface” chapter in the user guide.

  • The new web interface also needs AsyncOS API (Monitoring) ports for HTTP and HTTPS. By default, these ports are 6080 and 6443. The AsyncOS API (Monitoring) ports can also be customized using the interfaceconfig CLI command. For more information about the interfaceconfig CLI command, see “Command Line Interface” chapter in the user guide.

If you change these default ports, ensure that the customized ports for the new web interface are not blocked in the enterprise firewall.

The new web interface opens in a new browser window and you must log in again to access it. If you want to log out of the appliance completely, you need to log out of both the new and legacy web interfaces of your appliance.

For a seamless navigation and rendering of HTML pages, Cisco recommends using the following browsers to access the new web interface of the appliance (AsyncOS 11.8 and later):

  • Google Chrome

  • Mozilla Firefox

You can access the legacy web interface of the appliance on any of the supported browsers.

The supported resolution for the new web interface of the appliance (AsyncOS 11.8 and later) is between 1280x800 and 1680x1050. The best viewed resolution is 1440x900, for all the browsers.


Note

Cisco does not recommend viewing the new web interface of the appliance on higher resolutions.

Supported Hardware for This Release

The build is available for upgrade on all the existing supported platforms, whereas the enhanced performance support is available only for the following hardware models:

– Sx90

– Sx95/F models


Note

The Sx80 models are not supported from AsyncOS version 14.0 onwards.

Virtual Models:

– S100v

– S300v

– S600v

Upgrade Paths

Upgrading to AsyncOS 14.1.0-047

You can upgrade to the release 14.1.0-047 of AsyncOS for Cisco Web Security appliances from the following versions:


Note

While upgrading, do not connect any devices (keyboard, mouse, management devices (Raritan) etc.) to the USB ports of the appliance.

  • 14.1.0-041

  • 14.1.0-032

Upgrading to AsyncOS 14.1.0-041

You can upgrade to the release 14.1.0-041 of AsyncOS for Cisco Web Security appliances from the following versions:


Note

While upgrading, do not connect any devices (keyboard, mouse, management devices (Raritan) etc.) to the USB ports of the appliance.

  • 14.1.0-032

Upgrading to AsyncOS 14.1.0-032

You can upgrade to the release 14.1.0-032 of AsyncOS for Cisco Web Security appliances from the following versions:


Note

While upgrading, do not connect any devices (keyboard, mouse, management devices (Raritan) etc.) to the USB ports of the appliance.

  • 11.7.3-025

  • 11.8.0-453

  • 11.8.1-023

  • 11.8.1-028

  • 11.8.1-511

  • 11.8.1-604

  • 11.8.1-702

  • 11.8.2-009

  • 11.8.2-702

  • 11.8.3-021

  • 11.8.3-501

  • 12.0.1-268

  • 12.0.1-334

  • 12.0.2-004

  • 12.0.2-012

  • 12.5.1-011

  • 12.5.1-035

  • 12.5.1-043

  • 14.0.0-467

  • 14.0.1-014

Post–Upgrade Requirements

After you upgrade to 14.1.0-047, you must perform the following steps if you have not registered your appliance with Cisco Threat Response:


Note

This procedure is not applicable if you have already registered your appliance with Cisco Threat Response.

Procedure

Step 1

Create a user account in the Cisco Threat Response portal with admin access rights.

To create a new user account, navigate to the Cisco Threat Response portal login page using the following URL- https://visibility.amp.cisco.com and click ‘Create a Cisco Security Account’. If you are unable to create a new user account, contact Cisco TAC for assistance.

Step 2

For registering your appliance with Security Services Exchange (SSE) cloud portal, generate token from SSE portal corresponding to your region.

While registering with SSE cloud portal, select the following FQDN based on your region from the web user interface of your appliance:

- AMERICAS (api-sse.cisco.com)

- EUROPE (api.eu.sse.itd.cisco.com)

- APJC (api.apj.sse.itd.cisco.com)

Step 3

Make sure that you enable Cisco Threat Response under Cloud Services on the Security Services Exchange portal. Ensure that you open HTTPS (In and Out) 443 port on the firewall for the FQDN api-sse.cisco.com (America) to register your appliance with the Security Services Exchange portal.

To deploy a virtual appliance, see the Cisco Content Security Virtual Appliance Installation Guide, available from http://www.cisco.com/c/en/us/support/security/web-security-appliance/products-installation-guides-list.html.

Compatibility Details

IPv6 and Kerberos Not Available in Cloud Connector Mode

When the appliance is configured in Cloud Connector mode, unavailable options for IPv6 addresses and Kerberos authentication appear on pages of the web interface. Although the options appear to be available, they are not supported in Cloud Connector mode. Do not attempt to configure the appliance to use IPv6 addresses or Kerberos authentication when in Cloud Connector mode.

Functional Support for IPv6 Addresses

Features and functionality that support IPv6 addresses:

  • Command line and web interfaces. You can access the appliance using http://[2001:2:2::8]:8080 or https://[2001:2:2::8]:8443

  • Performing Proxy actions on IPv6 data traffic (HTTP/HTTPS/SOCKS/FTP)

  • IPv6 DNS Servers

  • WCCP 2.01 (Cat6K Switch) and Layer 4 transparent redirection

  • Upstream Proxies

  • Authentication Services

    • Active Directory (NTLMSSP, Basic, and Kerberos)

    • LDAP

    • SaaS SSO

    • Transparent User Identification through CDA (communication with CDA is IPv4 only)

    • Credential Encryption

  • Web Reporting and Web Tracking

  • External DLP Servers (communication between the appliance and DLP Server is IPv4 only)

  • PAC File Hosting

  • Protocols: NTP, RADIUS, SNMP, and syslog over management server

Features and functionality that require IPv4 addresses:

  • Internal SMTP relay

  • External Authentication

  • Log subscriptions push method: FTP, SCP, and syslog

  • NTP servers

  • Local update servers, including Proxy Servers for updates

  • Authentication services

  • AnyConnect Security Mobility

  • Novell eDirectory authentication servers

  • Custom logo for end-user notification pages

  • Communication between the Web Security appliance and the Security Management appliance

  • WCCP versions prior to 2.01

  • SNMP

Availability of Kerberos Authentication for Operating Systems and Browsers

You can use Kerberos authentication with these operating systems and browsers:

  • Windows servers 2003, 2008, 2008R2, and 2012.

  • Latest releases of Safari and Firefox browsers on Mac (OSX Version 10.5 and later)

  • IE (Version 7 and later) and latest releases of Firefox and Chrome browsers on Windows 7 and later.

Kerberos authentication is not available with these operating systems and browsers:

  • Windows operating systems not mentioned above

  • Browsers not mentioned above

  • iOS and Android

Deploying a Virtual Appliance

To deploy a virtual appliance, see the Cisco Content Security Virtual Appliance Installation Guide, available at http://www.cisco.com/c/en/us/support/security/web-security-appliance/products-installation-guides-list.html.

Migrating from a Hardware Appliance to a Virtual Appliance

Procedure

Step 1

Set up your virtual appliance with this AsyncOS release using the documentation described in Post-Upgrade Requirements.

Note 

Ensure that the Security Services updates are successful
Step 2

Upgrade your hardware appliance to this AsyncOS release.
Step 3

Save the configuration file from your upgraded hardware appliance.
Step 4

Load the configuration file from the hardware appliance onto the virtual appliance.

If your hardware and virtual appliances have different IP addresses, deselect Load Network Settings before loading the configuration file.

Step 5

Commit your changes.
Step 6

Go to Network > Authentication and join the domain again. Otherwise identities won’t work.

Upgrading AsyncOS for Web

Before you begin

  • Perform preupgrade requirements, including updating the RAID controller firmware.

  • Log in as Administrator.

Procedure

Step 1

On the System Administration > Configuration File page, save the XML configuration file from the Web Security appliance.

Step 2

On the System Administration > System Upgrade page, click Upgrade Options.

Step 3

You can select either Download and install, or Download only.

Choose from the list of available upgrades.
Step 4

Click Proceed.

If you chose Download only, the upgrade will be downloaded to the appliance.

Step 5

If you chose Download and install, when the upgrade is complete, click Reboot Now to reboot the Web Security appliance.

Note 

To verify the browser loads the new online help content in the upgraded version of AsyncOS, you must exit the browser and then open it before viewing the online help. This clears the browser cache of any outdated content.

Important! Actions Required After Upgrading

In order to ensure that your appliance continues to function properly after an upgrade, you must address the following items:

Change the Default Proxy Services Cipher Suites to Cisco Recommended Cipher Suites

From AsyncOS 9.1.1 onwards, the default cipher suites available for Proxy Services are modified to include only secure cipher suites.

However, if you are upgrading from AsyncOS 9.x.x and later releases, the default Proxy Services cipher suites are not modified. For enhanced security, Cisco recommends that you change the default Proxy Services cipher suites to the Cisco recommended cipher suites after the upgrade. Do the following:

Procedure

Step 1

Log in to your appliance using the web interface.

Step 2

Click System Administration > SSL Configuration.

Step 3

Click Edit Settings.

Step 4

Under Proxy Services, set the Cipher(s) to Use field to the following field:

EECDH:DSS:RSA:!NULL:!eNULL:!aNULL:!EXPORT:!3DES:!SEED:!CAMELLIA:!SRP:!IDEA:!DHE-DSS-AES256-SHA:!AES256-SHA:DHE-RSA-AES128-SHA:TLS_AES_256_GCM_SHA384:TLS_AES_128_GCM_SHA256:TLS_CHACHA20_POLY1305_SHA256

Caution 

Make sure that you paste the above string as a single string with no carriage returns or spaces.
Step 5

Submit and commit your changes.

You can also use the sslconfig command in CLI to perform the above steps.

Virtual Appliances: Required Changes for SSH Security Vulnerability Fix

Requirements in this section were introduced in AsyncOS 8.8.

The following security vulnerability will be fixed during upgrade if it exists on your appliance:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150625-ironport.


Note

This patch is required only for virtual appliance releases that were downloaded or upgraded before June 25, 2015.

If you did not patch this issue before upgrading, you will see a message during upgrade stating that it has been fixed. If you see this message, the following actions are required to return your appliance to full working order after upgrade:

  • Remove the existing entry for your appliance from the known hosts list in your ssh utility. Then ssh to the appliance and accept the connection with the new key.

  • If you use SCP push to transfer logs to a remote server (including Splunk): Clear the old SSH host key for the appliance from the remote server.

  • If your deployment includes a Cisco Content Security Management Appliance, see important instructions in the Release Notes for that appliance.

File Analysis: Required Changes to View Analysis Result Details in the Cloud

If you have deployed multiple content security appliances (web, email, and/or management) and you want to view detailed file analysis results in the cloud for all files uploaded from any appliance in your organization, you must configure an appliance group on each appliance after upgrading. To configure appliance groups, see the “File Reputation Filtering and File Analysis” chapter in the user guide PDF. (This PDF is more current than the online help in AsyncOS 8.8.)

File Analysis: Verify File Types To Be Analyzed

The File Analysis cloud server URL changed in AsyncOS 8.8, and as a result, the file types that can be analyzed may have changed after upgrade. You should receive an alert if there are changes. To verify the file types selected for analysis, select Security Services > Anti-Malware and Reputation and look at the Advanced Malware Protection settings.

Unescaped Dots in Regular Expressions

Following upgrades to the regular-expression pattern-matching engine, you may receive an alert regarding unescaped dots in existing pattern definitions after updating your system. Any unescaped dot in a pattern that will return more than 63 characters after the dot will be disabled by the Velocity pattern-matching engine, and an alert to that effect will be sent to you, and you continue to receive an alert following each update until you correct or replace the pattern. Generally, unescaped dots in a larger regular expression can be problematic and should be avoided.

Documentation Updates

The user guide in the website (www.cisco.com) may be more current than the online help. To obtain the user guide and other documentation for this product, click the View PDF button in the online help or visit the URL shown in Related Documentation.

Known and Fixed Issues

Use the Cisco Bug Search Tool to find information about known and fixed defects in this release.

Finding Information about Known and Resolved Issues

Use the Cisco Bug Search Tool to find current information about known and resolved defects.

Before you begin

Register for a Cisco account if you do not have one. Go to https://identity.cisco.com/ui/tenants/global/v1.0/enrollment-ui.

Procedure

Step 1

Go to https://tools.cisco.com/bugsearch/.

Step 2

Log in with your Cisco account credentials.
Step 3

Click Select from list > Security > Web Security > Cisco Web Security Appliance, and click OK.

Step 4

In Releases field, enter the version of the release, for example, x.x.x.

Step 5

Depending on your requirements, do one of the following:

  • To view the list of resolved issues, select Fixed in these Releases from the Releases drop-down.

  • To view the list of known issues, select Affecting these Releases from the Releases drop-down and select Open from the Status drop-down.


Note

If you have questions or problems, click the Help or Feedback links at the top right side of the tool. There is also an interactive tour; to view it, click the link in the orange bar above the search fields.

Support

Cisco Support Community

Cisco Support Community is an online forum for Cisco customers, partners, and employees. It provides a place to discuss general web security issues as well as technical information about specific Cisco products. You can post topics to the forum to ask questions and share information with other Cisco users.

Access the Cisco Support Community for web security and associated management:

https://supportforums.cisco.com/community/5786/web-security