Network Engineering

JULY 14, 2022

In TCP, one purpose of 3-way-handshake is to exchange initial sequence number for both sides. So why not use 0 instead, and the exchange is not necessary. That is to say, sequence numbers can be determined without the 3-way-handshake.

TCP 130

TCP 130

Network Engineering

APRIL 4, 2025

I tried to find some implementations of bbr, especially in quic, but it seems that there are no good examples except for the implementations from google. Is it so complicated?

TCP 130

TCP 130

Network Engineering

NOVEMBER 24, 2016

I am developing a TCP implementation and could not find a clarification to this in the relevant RFCs (793, 1122, 5681, 6298). When the retransmission timer expires, the first segment which has once been sent but has not yet been acknowledged is retransmitted, and CWND is set to one segment.

TCP 130

TCP Protocol 130

PubNub

JANUARY 8, 2025

The Real-time Communication API Blog: best practices across in-app chat, push notifications, location tracking and more.

TCP 98

TCP 98

DCNN Magazine

MARCH 10, 2025

With Modbus TCP/RTU connectivity, it enables remote, real-time tracking, integrating seamlessly with existing monitoring systems to identify and resolve inefficiencies instantly, improving overall operational efficiency. The RL9405 securely stores energy data even during power outages, ensuring critical insights are never lost.

Energy 130

Energy TCP Server Engineering 130

CloudFaire

APRIL 9, 2025

Were happy to announce that we are the fastest network in 48% of the top 1000 networks by 95th percentile TCP connection time between November 2024, and March 2025, up from 44% in September 2024. When benchmarking, we assess the 95th percentile TCP connection time. ms) 3 Google 180 ms +0.74% (+1.32 ms) 3 Google 124 ms +6.21% (+7.22

Network 74

Network Networking TCP Internet 74

Noction

MARCH 21, 2024

TCP headers play a crucial role in ensuring every piece of information reaches its destination intact. Learn about TCP header size, structure, checksum mechanism, and more in our latest article! Ever wondered how data travels seamlessly over the internet?

TCP 52

TCP Internet Protocol 52

The Network DNA

JUNE 4, 2024

CCNA: TCP/IP Stack TCP/IP Stack is the most widely used protocol stack. TCP/IP stack is a conceptual model consisting of network communication protocols. TCP/IP stack has four layers Application, Transport, Internet, and Network Interface. TCP/IP networks use TCP or UDP protocol at this layer.

TCP 52

TCP Ethernet Protocol LAN 52

Network Engineering

JULY 25, 2024

deny tcp any eq 443 any eq 80 deny tcp any eq 80 any eq 80 deny tcp any eq 443 any eq 443 deny tcp any eq 80 any eq 443 I plan to block suspicious traffic flows on my network. Do you think any of the following could be a valid flow?

TCP 130

TCP Network Networking 130

Docker Blog

APRIL 9, 2025

Setting up Docker Model Runner with Gemma 3 Docker Model Runner provides an OpenAI-compatible API interface to run models locally. It is included in Docker Desktop for macOS, starting with version 4.40.0.

TCP 264

TCP Networking Network 264

The Network DNA

JUNE 17, 2024

CCNA: TCP 3-Way Handshake In this article, lets take a look at TCP three-way handshake and other useful information that makes TCP a reliable communication protocol. Before TCP can send any traffic, it first contacts the other device and establish a reliable and controlled connection.

TCP 52

TCP Ethernet Port LAN 52

Netflix Tech Blog

APRIL 8, 2025

By Cheng Xie , Bryan Shultz , and Christine Xu In a previous blog post , we described how Netflix uses eBPF to capture TCP flow logs at scale for enhanced network insights. It uses eBPF and TCP tracepoints to monitor TCP socket state changes. It uses eBPF and TCP tracepoints to monitor TCP socket state changes.

IP Address 76

IP Address TCP Port Topology 76

The Network DNA

JUNE 19, 2024

CCNA: TCP Sequence & Port Number This article can be read as the second part of the previous article CCNA: 3-Way Handshake where we discussed what makes TCP a reliable protocol for transmitting information. Lets discuss the TCP SEQ and Port numbers in this article. TCP breaks this information into two pieces CC and NA.

Port 52

Port TCP Ethernet LAN 52

CloudFaire

MARCH 21, 2025

RDP relies directly on the Layer 4 Transmission Control Protocol (TCP) for communication, and while browsers can use TCP as the underlying protocol, they do not expose APIs that would let apps build protocol support directly on raw TCP sockets. From a practical perspective, browsers just can't send RDP messages.

Protocol 129

Protocol Server TCP Gateway 129

SysAdmin1138 Explains

MAY 28, 2024

Looking at the packet trace of the behind the router case saw the TCP handshake finish, but TLS handshake fail after the initial hello. <rule> <tcp-mss-clamp value="1448"/> </rule> MSS means ' maximum segment size ' which is a TCP thing indicating how much the TCP portion of the packet can occupy. . <rule>

TCP 52

TCP Routers VPN Internet 52

InfoQ Articles

MARCH 24, 2023

Chronicle Wire offers an alternative way of transferring data between systems, delivering more messages, faster, than common JSON/XML approaches. This approach to data serialization improves both latency and throughput. By George Ball

TCP 107

TCP 107

Network Engineering

JANUARY 25, 2025

Either would be fine; I just want to experiment and see how can I use a multicast address to send/receive either tcp or udp packets. I'm not even sure what I can do liste to multicast? Only send data to multicast?

TCP 130

TCP Server 130

PubNub

JANUARY 8, 2025

This guide provides an uncomplicated method to simulate TCP resets (RST) in a test setting. It's a step-by-step tutorial to facilitate the procedure.

TCP 52

TCP 52

Noction

DECEMBER 4, 2022

Monitoring TCP flags gives you a better understanding of what is really going on in your networks. For example, an excessive number of of TCP SYN flags may indicate a denial-of-service attack

TCP 52

TCP Network Networking 52

NW Kings

DECEMBER 10, 2024

Understanding TCP ports is essential for managing network traffic and ensuring effective communication. But what is a TCP port? This blog will delve into what a TCP port is, how it works, its significance in networking, and the different types of ports, including well-known and dynamic ports. What is a TCP Port?

UDP port 40

UDP port TCP Port IP Address 40

Network Engineering

JANUARY 12, 2025

But, I am seeing frames that are coming in that are too large, so TCP has to back off and slow everything down. Note that this is a TCP stream flowing from 74.208.172.37 I am having a weird situation where I have a device that can't accept larger-than-ethernet-frames. What could possible cause larger-than-MTU packets? to 192.168.1.248.

Server 130

Server TCP Ethernet Network 130

Packet Pushers

JULY 15, 2022

More specifically, DNS transport over TCP. We talk with John Kristoff, one of the forces behind RFC9210, which covers the operational requirements for DNS transport over TCP. More specifically, DNS transport over TCP. DNS is our subject on today's Heavy Networking. We talk with John about the implications of this RFC.

DNS 52

DNS TCP Network Networking 52

Network Engineering

DECEMBER 21, 2015

For example, the internet has two protocols - TCP and UDP. Each of these protocols provides a different set of transport layer services to in invoking applications more specifically this line: For example, the internet has two protocols -TCP and UDP What are some examples of non-internet Transport layer protocols?

Internet 130

Internet Network Networking Protocol 130

PubNub

OCTOBER 7, 2024

TCP or UDP? Dive into the key differences, performance trade-offs, and when to choose each for your app's networking needs in this developer guide!

TCP 40

TCP Network Networking 40

Network Engineering

JANUARY 17, 2025

With 1473 I get fragmentation. ping -c 1 -S WANIP -s 1472 -D google.com ) Now, when I ping via the wireguard gateway, I get the same results which I don not understand as all the headers with wireguard should be 60 Bytes.

WAN 130

WAN TCP LAN Gateway 130

Network Engineering

JANUARY 15, 2025

I have a TCP server running on my Ubuntu gateway computer at 10.0.0.1:8080. My Wi-Fi is connected to the gateway's LAN (enp4s0) port, and my modem is in bridge mode and plugged into enp3s0. I can tell the service is working correctly because when I use curl -x 10.0.0.1:8080

LAN 130

LAN Gateway TCP Port 130

ByteByteGo

JANUARY 11, 2025

Next, your browser initiates a TCP connection like a handshake. the client and server perform a TCP three-way handshake with SYN, SYN-ACK, and ACK messages. The request goes through different DNS servers (root, TLD, and authoritative). Finally, the IP address is retrieved. For example, in the case of HTTP 1.1,

IP Address 201

IP Address TCP DNS Server 201

Network Engineering

DECEMBER 16, 2015

nat (inside,dmz) static 123.123.27.134 service tcp ssh ssh access-list OUTSIDE extended permit tcp any host 123.123.27.134 eq ssh However, when I do that, and try to telnet to port 22 on 123.123.27.134 I end up on a server that does not even belong to us and SSH version that I do not expect. Stripped for readability. 255.255.255.0

IP Address 130

IP Address Port TCP Server 130

Kentik

JULY 28, 2021

It isn’t so much that packet loss is a huge problem — TCP and QUIC were engineered in anticipation that lost packets would be inevitable. Latency : Missing packets in connection-oriented protocols such as TCP and QUIC result in lost packets getting resent. UDP vs. TCP. Packet Loss Causes Problems with Cloud Applications.

Cloud 116

Cloud TCP Routers Protocol 116

PubNub

JANUARY 8, 2025

A look at the key benefits of separating game servers from infrastructure for in-game chat.

Server 75

Server TCP 75

Network Engineering

AUGUST 16, 2024

Here is my config: # ip nat outside source static tcp 192.168.1.2 When forwarding the packet out of f0/0 to ip address 192.168.2.2 and destination port 5678, here be careful, then with source ip address of f0/0 192.168.2.1. 1234 192.168.2.2 5678 # ip access-list standard ACL-NAT-CAPABLE # permit 192.168.1.0

Port 130

Port Routers IP Address Topology 130

4sysops

FEBRUARY 14, 2025

The iSCSI protocol enables connection to remote storage over TCP/IP networks, making it particularly useful in centralized storage and data center environments. This problem emerged for servers using NDIS Poll Mode to boot from iSCSI LUNs after completing the installation of Windows Server 2025, as noted by Microsoft.

Server 52

Server TCP Data Centers Protocol 52

PubNub

NOVEMBER 13, 2023

Learn about TCP/IP, the foundation of the internet. Discover its functions, including addressing, routing, reliable data delivery, and more.

TCP 40

TCP Internet 40

Network Engineering

MAY 6, 2024

Note, I also tried UDP or TCP SYN instead of ICMP ECHO, which gave 3 hops but all reporting the same IP as the target, and UDPLITE only gave 169.254.175.250 which I assume is Fargate infra?)

IP Address 130

IP Address Network Interface TCP Network 130

CloudFaire

APRIL 8, 2025

While its been possible to make TCP connections from Workers for some time , MySQL drivers had many dependencies on Node.js PlanetScale provided a serverless driver for JavaScript , which communicates with PlanetScale servers using HTTP instead of TCP to relay database messages. This led to workarounds being developed.

JavaScript 95

JavaScript Protocol Port TCP 95

Network Engineering

NOVEMBER 20, 2021

when I send TCP syn attack towards my control plane my CPU usages is around %20-30 but my bgp session goes down and I can enter command slowly, whats wrong?

TCP 130

TCP 130

Network Engineering

MARCH 28, 2024

and When the Receiving Speaker detects termination of the TCP session for a BGP session with a peer that has advertised the Graceful Restart Capability, it MUST retain the routes received from the peer for all the address families that were previously received in the Graceful Restart Capability and MUST mark them as stale routing information.

TCP 130

TCP Advertising 130