I have pi-hole setup. Recently, I have updated iphone OS to 14.0.1. From the moment iphone is updated to OS version 14, internet stopped working on iphone. Toggled private address option under wifi, but no use. I have changed dns to public dns and everything worked as normal.
Solution:
I had to edit /etc/pihole/setupVars.conf file. In my case, IPV6_ADDRESS column is empty. Edit the file and add fd00::/8 to it as shown below and save it.
You need to choose a user attribute to store user’s alternate email in user properties while configuring netscaler SSPR.
Issue:
You’ve chosen a user attribute which is not in use, and configured netscaler SSPR. User, when logging in for the first time to netscaler gateway url, got questions to fill and enter alternate email id page after entering credentials. Immediately, they get an error “System error” and will be returned back to username and password page.
Export and Import Citrix ADC (Netscaler) portal theme:
If you have a lot of Netscaler devices to manage, creating themes on all those Netscalers will be difficult. You can use the below process to create a theme on one Netscaler and copy it to other Netscalers. If you have too many Netscalers, connecting to Netscalers via putty may be an easy way.
Steps for copying portal theme:
Create a new portal theme on the first Netscaler.
Reverse Proxy:
A reverse proxy is a server that sits in front of web servers and forwards client (e.g. web browser) requests to those web servers. Reverse proxies are typically implemented to help increase security, performance, and reliability.
A reverse proxy server is an intermediate connection point positioned at a network’s edge. It receives initial HTTP connection requests, acting like the actual endpoint.
what is x-forwarded-for in netscaler:
when you’re using a 3rd party reverse proxy such as CloudFlare you will see the IP address from the reverse proxy instead of the actual Client IP Address on your webserver.
What is the difference between running and saved configuration on NetScaler? A: A running configuration refers to the configuration currently running on a NetScaler system. The running configuration on a NetScaler can be seen by issuing the show ns runningconfig command in the Command Line.
A saved configuration shows the commands that have been issued through the NetScaler command line interface (CLI) or the NetScaler GUI and committed to save. The saved configuration on a NetScaler can be seen by issuing the show ns.
Netscaler High Availability A high availability (HA) deployment of two NetScaler appliances can provide uninterrupted operation in any transaction. With one appliance configured as the primary node and the other as the secondary node, the primary node accepts connections and manages servers while the secondary node monitors the primary. If, for any reason, the primary node is unable to accept connections, the secondary node takes over.
The secondary node monitors the primary by sending periodic messages (often called heartbeat messages or health checks) to determine whether the primary node is accepting connections.
Issue: vcenter certificate replaced. From thereon, Citrix studio cant connect to vcenter. Power control options grayed out in director and studio doesn’t show power options at all.
Troubleshooting: Hypervisor tests on the vcenter server url in studio->hosting tab, show that studio cant connect to vcenter because of certificate issue.
Solution:
Goto your vcenter url: https://vcenter.domain.com on IE, download the certificate in DER encoded cert format. Install it to trusted people, select show physical stores.
Issue: Citrix VDA is not registered.
Troubleshooting:
Checked Citrix services on the VDI. Citrix ICA service wasnt started. Throws error, “windows could not start the citrix ica service on local computer 1067” and fails to start.
Solutions:
On the VDI, check if authenticated users group is added to local administrators group. If you find it, remove it. Start ICA service and other citrix services. Restart citrix desktop service. On the VDI, check if local service account is added to local administrators group on the VDA.
Those who are on IOS 14 OS might have seen below prompt when opening apps. VNC Viewer is an example shown here. In IOS 14 we see similar prompt for almost all apps.
If you do not allow access for these apps to your local network, they wont work. In case if you have disabled access, goto settings, select the app and enable local network option.
While upgrading or installing linux OS from one version to another you might end up in below error. In my case, I tried to install linux mint 20 (Ulyana), and faced the error. Note: I have already disabled secure boot in my laptop.
I have downloaded Linux mint 20 ISO from their website and made it bootable with Rufus software (MBR partition scheme and BIOS or UEFI target system). Attached USB to laptop and installed Linux Mint 20.
