Unable to access Ingress Controller in Azure AKS issue

I've upgraded my AKS nodes in Cluster last night.
After upgraded both nodes, all my apps went down and all my internal load balancers was not able to access.

Spending many hours in troubleshooting and ends up with the miserable findings of root caused.

That's it....

The Resource Tagging used in my Cluster and it's resource has exceed more than 50 tags.
Microsoft recommendation is to maintain the tags less than 20.

After I've removed over 30 tags and refresh the nodes then only all my resources are back up online as well as the applications.

Currently, the resource sync the tags with cluster are below,

AKS Cluster itself
Router Table
Pubic IP
Load Balancer
Network Security Group
Virtual Network
AKS managed kubelet msi
AKS managed addon msi
Private DNS zone
Private endpoint

So, beware this when you have more than 50 tags on your AKS Cluster.


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Staying Home? Get paid for surfing the web!

Staying Home? Get paid for surfing the web! You can earn some passive money by using below browser on your mobile phone, table and computer. Just try it during this globally impacted COVID-19 situation. https://cryptotabbrowser.com/landing/57/25117657 What you need to do is download the CryptoTab Browser in above link and use it as default browser on your gadegets then get paid. That's all. Thanks. Have fun!

How to copy file from TFTP server via vrf enabled interface in Cisco Devices?

TFTP server is sitting in subnet which can reach via global routing table and your network devices is configured OOB with vrf routing.

You have no other ways to copy your files to your device except from TFTP server.

What will you do then? 😊
Leaking vrf to global routing or vice versa? 

The answer is ...
configure terminal
ip tftp source-interface (Your OOB interface IP)

You’re done.


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PAN OS API Key problem after upgrade from 7 to 8

When you use External Block List for Malicious IP with your PaloAlto, you need API Key for your server to refresh the list whenever you update the content.

The API key syntax for PAN OS 7 and 8 is different and it will take your time after you upgrade PAN OS.

So here is the solution what I've tested.

Syntax for 7 is

https://<firewall IP>/api/?type=op&cmd=<request><system><external-list><refresh><name>Type 
your EBL Name Here</name></refresh></external-list></system></request>&key="API Key"

Syntax for 8 is

https://<firewall ip>/api/?type=op&cmd=<request><system><external-list><refresh><type><ip>
<name>Type your EBL Name Here</name></ip>
</type></refresh></external-list></system></request>&key="API Key"

Have fun with PAN OS.


Have a good day!

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Why is this ransomware attack different?

Unlike other ransomware families, the WannaCry strain does not spread via infected e-mails or infected links. Instead, it takes advantage of a security hole in most Windows versions to automatically execute itself on the victim PC. According to various reports, this attack avenue has been developed by the National Security Agency (NSA) in the US as a cyber-weapon and it was leaked to the public earlier in April along with other classified data allegedly stolen from the agency.
Until now, a number of hospitals, telecom companies or gas and utilities plants have suffered massive disruptions caused by data being held at ransom.
As this ongoing outbreak is affecting countless computer users around the world, we are actively working on a free decryption tool to help victims recover their information without paying the ransom. Make sure to follow us on Twitter and Facebook to be notified when it becomes available.
Source : Bitdefender


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MPLS Troubleshooting Tips

Anyone of you having difficulty in troubleshooting MPLS as a beginner?
I did some research and take notes for myself and now it is for you to do reference as well.

MPLS troubleshooting can be divided into two main steps:

1) Verify routing information flow
2) Verify proper data flow

- Routing information flow troubleshooting requires verification of end-to-end routing information propagation between CE routers.
- Verification of the routing information flow should be done systematically, starting at the routing ingress CE and moving to the egress CE.
- Verification of the data flow should be done systematically, starting at the data flow ingress CE and moving to the egress CE.

There are three things to perform basic MPLS troubleshooting.
They are,
1) Preliminary steps in MPLS VPN Troubleshooting:
- Is CEF enabled?
- Are labels for IGP routes generated and propagated?
- Are large labeled packets propagated across the MPLS backbone (maximum transmission unit issues)?

2) Verify the routing information flow:
- Are CE routes received by a PE?
- Are routes redistributed into MP-BGP with proper extended communities?
- Are VPNv4 routes propagated to other PE routers?
- Is the BGP route selection process working correctly?
- Are VPNv4 routes inserted into VRFs on other PE routers?
- Are VPNv4 routes redistributed from BGP into the PE-CE routing protocol?
- Are IPv4 routes propagated to other CE routers?

3) Verify proper data flow:
- Is CEF enabled on the ingress PE router interface?
- Is the CEF entry correct on the ingress PE router?
- Is there an end-to-end label switched path tunnel (LSP tunnel) between PE routers?
- Is the LFIB entry on the egress PE router correct?

Do you have/know something that I missed out in my above list? Please assist me by letting know. Thanks.

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Ryzerlo ransomware poses as Pokemon game

The Dell SonicWall Threats Research team has received reports of a new Ransomware Trojan, Ryzerlo which encrypts the victim's files and leaves an email address to be contacted to unlock victim's files.
Infection cycle:
The Trojan comes across as Pokemon Go game with the icon
Once the victim installs the executable, the trojan adds the some changes to the registry.
The Trojan adds two autostart objects to enable startup after reboot:
  • %APPDATA%\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\[numbers].exe (copy of original)
It tries to connect to the C&C server and then the trojan encrypts all the victims documents with extensions * .txt, * .rtf, * .doc, * .pdf, * .mht, * .docx, * .xls, * .xlsx, * .ppt, * .pptx, * .odt, * .jpg, *. png, * .csv, * .sql, * .mdb, * .sln, * .php, * .asp, * .aspx, * .html, * .xml, * .psd, * .htm, * .gif, * .png with .locked extension. 
The trojan creates the following two files on the victim's desktop. One include random text and another one include email address to contact.
We urge our users to always be vigilant and cautious with any unsolicited attachments specially if you are not certain of the source. If you are responsible for your system and network security, it's time to patch your security devices.

Source : Dell SonicWall Center

Have a nice day.
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