KeepAlive | The Backend Engineering Show

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Why the numbering? Are we keeping numbers alive? 😀

Love this channel

I live in Syria and it takes around 10 hours to download 40G not to mention the upload which is four times slower

Hussein is the backend GOAT

But The middle router gives me middle finger 😂😂😂.

Wow, you're working on your delivery/voice looks like.

Now i have to admit... I have also thought that TCP is single plath. That it is significantly easier to control a transmission once the path has been determined?

I'm "keep-alive" till the end. I like long video talking about one topic in detail.
Thanks man you are awesome😎

You are awesome Sir😎, I learned a lot from your videos. Keep up the good work 🙌

To be honest, I thought that "keepAlive" is a new name for backend engineering show:)

TL:DR: Some middle boxes decide to send the packets over the same path to avoid other middle boxes from dropping the packets.

About routing: The routes were already calculated, the only time where hashing comes into play is when the route metrics cost are the same. The hashing takes place when running ECMP (Equal cost multi-path). It is usually better to send the same stream over the same path otherwise Packets may arrive out of order, also stateful firewalls drop stuff or reply with retransmits. Then Deep packet inspection boxes and Intrusion prevention systems won't work as well when only intercepting a partial TCP stream.

About IP Spoofing:
Spoof detection is a little different than what you describe, ISP have full knowledge of which clients are permitted which source IPs because they own that space, at L3 world spoofing is more difficult.

i love it when you dive deep into a topic, please keep it up man \m/

I literally got a job of NE by watching your video, you are the god man. I aced all interview questions since all of them were discussed by you!

I think It is a great idea to name your show/podcast "KeepAlive".

"The middle router gives me the middle finger" - Hussein Nasser. Love it!

This is why instead of keep alive packets, most protocols use a regular data “ping” packet

These mf'ing middle boxes poking and probing into other people's business man!
I'll send whatever protocol I want to port 80, I'll spoof my IP, I'll send keep-alive headers while incrementing the packet count, why tf do you care if I misconfigure my sh*t bi*ch are you my parent?! MFers single-handedly slowed the internet down by making TCP sticky.

¡Gracias!

Yes Mr. Nasser, my internet is good 😂. Thank lord I found you.

Ive seen this cause problems with DoT servers. Having legitimate clients getting dropped because the client tries to send DoT requests over a non-existent connection. My server has been told its finished but the client doesn't know. Im usually seeing this on CGNAT mobile networks. Im guessing with my very limited knowledge its something to do with saving resources with connection transition on cell towers which may be just specific to my region.

Excellent video! Thanks you very much!

man i love that this channel exist....unique ....for learning backend engg In depth

Hussein's video stands out for its thoroughness in explaining each topic in detail, emphasizing the importance of introducing solutions. Loved it!