memchr() is a function that searches in a memory block for a character, this has been recently improved in the latest linux patch and we can learn something from this improvement I think, lets discuss.

https://www.phoronix.com/scan.php?page=news_item&px=Linux-Kernel-Faster-memchr

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https://network.husseinnasser.com

Amazon Aurora PostgreSQL-Compatible Edition now supports PostgreSQL major version 14 (14.3). Let us discuss this news.

https://aws.amazon.com/about-aws/whats-new/2022/06/amazon-aurora-supports-postgresql-14/

0:00 Intro

1:00 Database on the Cloud options

3:45 Amazon Aurora supports Postgres 14

6:00 Postgres 14 vs Postgres 13

Rogers Communications, the Canadian ISP is down. One of its ASNs (they have many) is AS812 with over 5 million IP addresses. Tried a few and none of them can be pinged from the US (not sure if ICMP is disabled or not)

This is a huge deal for all Canadians and businesses affected. So sorry for every one who is affected by this, and kudus to all the engineers at Rogers working to fix this for the past what? 11 hours now?

If an ASN goes dark like a Facebook or a Cloudflare that isn't a big deal you can go without using Facebook for a day. But if this is your ISP's ASN that connects you to the rest of the World goes down, actual users won't be able to connect.

We still don't know the cause but my guess it might be a bad BGP entry? that's what happened to Cloudflare or FB, could be something different. again so sorry for all my Canadian followers affected. Will make a video when I get a chance

Resources

https://www.bigdatacloud.com/asn-lookup/AS812

https://www.bigdatacloud.com/asn-lookup/AS7018

In this video I discuss early hints HTTP 103 status code, the problem it solves and the challenges it has.

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Transport Layer security or TLS is a protocol that encrypted the communication between client and server. TLS can also be used to authenticate the server, when the client also requires authentication this is called Mutual TLS and this is the topic of today’s show.

0:00 Introduction

2:00 What is TLS?

7:00 Server Authentication TLS

14:00 Advantages of one way TLS

19:44 Disadvantages of one way TLS

29:00 mTLS

31:00 Advantages of MTLS

37:00 The Problems of mTLS

43:00 Summary and my Thoughts

In this episode we go through the cloud flare outage blog.  https://blog.cloudflare.com/cloudflare-outage-on-june-21-2022/ Fundamentals of Networking for Effective Backends udemy course (link redirects to udemy with coupon) https://network.husseinnasser.com

In this video I explain what is a zero day vulnerability or attack.   Fundamentals of Networking for Effective Backends udemy course (link redirects to udemy with coupon) https://network.husseinnasser.com