How do I enable secure renegotiation in NetScaler?
You can allow secure renegotiation initiated by both NetScaler and client by choosing to block only “NONSECURE”, or only allow NetScaler initiated secure renegotiation by selecting the “FRONTEND_CLIENT” option.
What is TLS secure renegotiation?
The TLS 1.2 secure renegotiation can be a target for DDoS attacks, where an attacker can issue many SSL renegotiation requests. Because it takes much fewer resources for a client to perform a handshake than a server, the client can request multiple handshakes per second and cause a DoS on the server-side SSL interface.
Is NetScaler secure?
Citrix NetScaler ADC is an all-in-one networking appliance that improves performance, security, and resiliency of applications delivered over the Web. It has many functions to optimize, secure, and control the delivery of all enterprise and cloud services while maximizing end users’ experiences.
How do I disable default SSL profile?
Instructions
- Connect to the Netscaler using an SFTP program like WINSCP.
- Navigate to the nsconfig folder on the Netscaler.
- Copy the ns.conf file to your desktop and open with either Notepad or Notepad ++
- Search for the line: “set ssl parameter -defaultProfile ENABLED”
- Delete the line.
- Save the file.
How do I disable sslv3 in Citrix NetScaler?
Configuration tab > System > Profiles > SSL Profle Tab > > Edit. Select SSL Ciphers > Add > Select Cipher > uncheck SSL3, DES, MD5, RC4 Ciphers > Move the selected ones under configured. After moving list of Ciphers to Configured, select OK and save the configuration.
How do I turn off TLS renegotiation?
Disabling SSL/TLS client-initated renegotiation
- Backup the files: $FILEDRIVEHOME/bin/start_httpd.
- Edit the start_httpd script and add the following JAVA_OPTS line (you can add it on top of the #BEGIN GC LOGGING line):
- Edit the java.security file and add the following line:
- Restart all STservices.
What is TLS renegotiation time?
Mid-session TLS encryption key renegotiation The default value for this renegotiation is 360 minutes (6 hours). Session expiration will only be tested during TLS renegotiation which occurs automatically at the specified schedule with this setting or when the connection is disrupted and reconnects.
What does a Citrix NetScaler do?
Citrix NetScaler boosts business productivity by accelerating application performance for all users, while lowering datacenter costs by offloading server functionality. Citrix TriScale™ technology brings cloud-like network scalability and maximizes use of datacenter resources.
How does SSL renegotiation process work on NetScaler appliance?
The SSL renegotiation process can establish another secure SSL session because the renegotiation messages, including the types of ciphers and encryption keys, are encrypted and then sent over to the existing SSL connection. The NetScaler appliance does not request the client to renegotiate SSL connection.
Is there a nonsecure option for NetScaler 10.3?
NONSECURE: Deny non-secure SSL renegotiation to address the vulnerability described in RFC 5746. Note: The NONSECURE option is supported only on NetScaler software release 9.3.e, 10.x and later. To configure SSL parameters from ADC GUI, complete the following steps:
Which is the default SSL profile in NetScaler?
Secure Renegotiation is still is an issue though so we will tackle that next. Navigate back to the NetScaler Gateway. Under SSL Profile nothing will be selected by default. Click + and add the default SSL Profile. Now click the edit button. Change Deny SSL Renegotiation to NONSECURE.
How to disable client side SSL renegotiation?
Note: Default value is set to “ALL”. NO: Full SSL renegotiation is allowed. FRONTEND_CLIENT: Deny secure and non-secure SSL renegotiation initiated by the client. FRONTEND_CLIENTSERVER: Deny secure and non-secure SSL renegotiation initiated by the client and by the ADC appliance during policy-based clientAuth.