How to use NetScaler appliance to avoid Layer 7 DDoS attacks

This article describes how to use a NetScaler appliance to avoid layer 7 DDoS attacks when there is no dedicated device to protect from DDoS attacks...

Reverse Split Tunnel Use Case in XenMobile Server and NetScaler Integration

This article describes Reverse Split Tunnel use case in XenMobile Server and NetScaler, and its configuration steps...

Notice of Change Announcement for NetScaler SD-WAN 1000-WS (Windows Server Edition), 4000-WO (WAN Optimization Edition) and 5000-WO (WAN Optimization Edition)

Citrix Systems, Inc. announces End of Maintenance for Citrix ADC NetScaler SD-WAN 1000-WS Windows Server Edition, 4000-WO WAN Optimization Edition and 5000-WO WAN Optimization Edition appliances. The tables below explain the Citrix NetScaler SD-WAN lifecycle management milestones as well as...

Prevent iOS Receiver from using weak ciphers when connecting to NetScaler Gateway

How can Receiver for iOS be configured to not use weak ciphers that are susceptible to the Bleichenbacher attack?...

Citrix NetScaler VPX Server-Side Request Forgery Vulnerability

NetScaler VPX provides complete NetScaler Web and application load balancing, security and remote access, acceleration, security and offloading capabilities in a simple, easy-to-install virtual appliance. A server-side request forgery vulnerability exists in Citrix NetScaler VPX. An authenticated...

CVE-2018-6186

Citrix NetScaler VPX through NS12.0 53.13.nc allows an SSRF attack via the /rapi/readurl URI by an authenticated attacker who has a webapp account. The attacker can gain access to the nsroot account, and execute remote commands with root privileges...

Server side request forgery (ssrf)

Citrix NetScaler VPX through NS12.0 53.13.nc allows an SSRF attack via the /rapi/readurl URI by an authenticated attacker who has a webapp account. The attacker can gain access to the nsroot account, and execute remote commands with root privileges...

CVE-2018-6186

Citrix NetScaler VPX through NS12.0 53.13.nc allows an SSRF attack via the /rapi/readurl URI by an authenticated attacker who has a webapp account. The attacker can gain access to the nsroot account, and execute remote commands with root privileges...

CVE-2018-6186

CVE-2018-6186 affects Citrix NetScaler VPX through NS12.0 53.13.nc, enabling an SSRF attack via the /rapi/read_url URI by an authenticated user with a webapp account. The attacker can gain nsroot access and execute remote commands with root privileges. The issue is addressed by upgrading to Citri...

CVE-2018-6186

Citrix NetScaler VPX through NS12.0 53.13.nc allows an SSRF attack via the /rapi/readurl URI by an authenticated attacker who has a webapp account. The attacker can gain access to the nsroot account, and execute remote commands with root privileges...

Error: "HdxSdkErrorDomain_Session error 8" When Launching VDI Through NetScaler Gateway Using Receiver for iOS 7.2.4

When launching VDI usingReceiver for iOS 7.2.4 the following error is shown: "HdxSdkErrorDomainSession error 8"...

NetScaler Gateway is Unable to Access XenApp Applications

XenApp and XenDesktop are placed behind the NetScaler Gateway. User attempts to access the application and get the below error message: Unable to launch applications. Contact your helpdesk...

Fall back from TCP to UDP fails / displays SSL Error when Disconnecting and Reconnecting session via NetScaler

If HDX Adaptive Transport Policy set to Preferred on DDC and when attempting to connect to an Application or Desktop using Citrix Receiver for Windows 4.10 or Citrix Receiver for Mac 12.8 or Citrix Receiver for iOS 7.5 and above, you may encounter below issues: Session will get disconnect if...

Error: " Secure Hub Could Not Connect " When NetScaler is Rebooted

After NetScaler is rebooted, the existing users are not able to connect. The following error is displayed: Secure Hub could not connect...

Citrix Netscaler Detection (SNMP)

SNMP based detection of Citrix Netscaler. SPDX-FileCopyrightText: 2018 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription scriptoid"1.3.6.1.4.1.25623.1.0.140666"...

Citrix NetScaler Detection (SSH Login)

SSH login-based detection of Citrix NetScaler. SPDX-FileCopyrightText: 2018 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Configure "Authentication Verification Order" Different to the Order Prompted on Logon Page Using NetScaler nFactor

This article describes how to configure "authentication verification order" different to the order prompted on logon page Using NetScaler nFactor. Background The following is the authentication field prompt order of the NetScaler Gateway logon page: 1. Login 2. Domain password 3. One-time passwor...

Enlightened Data Transport Not working with Double Hop DMZ scenario

EDT requires policy on the XenDesktop to be enabled and DTLS on the NetScaler to be ON. Also, StoreFront needs to be minimum Version 3.8 and Citrix Receiver at 14.7. So all the requirements are met. At theXenDesktop Policy for "HDX Adaptive Transport" is set to "preferred", still connections fail...

RADIUS Group Extraction Failing with Error "Extracted group : Null"

NetScaler unable to extract the group from the Radius server and we get the following response from the Radius server"Extracted group : Null" in aaad.debug log...

Error: "Backup Failure: Could not find required XVA" on NetScaler SDX

After upgrading NetScaler SDX and Netscaler VPX firmware to any newer version you will get daily notifications about backups failing: For Example the Log Message is as below: Local0.Error 10.xx.xx. svmevent: GMT : EVENT BACKUPFAILED : 127.0.0.1:BackupFailure: - Could not find required XVA for...