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

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 Networking Network 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 Port TCP IP Address 40

Network Engineering

DECEMBER 10, 2023

In the tcp field option There are several options that can be added for example like mss But how if i don't use the SACK option, what kind of acknolegdment will I use cummulative?

TCP 52

TCP Network Networking 52

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 203

IP Address Server TCP DNS 203

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 Networking Network 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 91

TCP 91

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

CATO Networks

JANUARY 15, 2024

In this post, we will focus on the network and transport layers and introduce a machine learning OS identification model based on TCP/IP header values. At Cato we use ML models extensively across our service, and in this post specifically well delve into the details of how we enhanced our OS identification engine using a TCP/IP based model.

TCP 52

TCP Networking Network Engineering 52

Engineering at Meta

MAY 22, 2024

This is close to the typical TCP/IPv6 maximum segment size (MSS) of 1440 bytes, but is still fine for a full TLS handshake. This poses some challenges given significant usage of TCP Fast Open (TFO) for internal traffic. Figure 2: Left: TLS handshake with TFO done in same round trip as TCP handshake.

TCP 119

TCP Encryption Server Bandwidth 119

Kentik

SEPTEMBER 20, 2021

Packet loss in TCP connections results in retransmissions which can introduce significant latency. Below is the beginning of a TCP handshake. Although the ping utility on our computers uses ICMP, which is the first to see latency, other utilities similar to ping can execute tests similar to ping on top of TCP and UDP.

TCP 116

TCP Routers Bandwidth IP Address 116

Kentik

OCTOBER 4, 2021

Before the outage, UDP delivering traffic-intensive video dominated the volume of traffic volume while TCP constituted a minority. During the outage, the TCP traffic went away entirely, leaving a small amount of UDP traffic consisting of DNS retries from Facebook’s 3.5 billion users attempting in vain to reconnect to their services.

TCP 145

TCP DNS Server Media 145

ByteByteGo

NOVEMBER 30, 2024

The protocol was built on top of TCP and provided a reliable way of communication over the World Wide Web. However, it still used TCP as the underlying protocol. In other words, HTTP 3 has moved away from TCP. HTTP 1 (and its sub-versions) introduced features like persistent connections, pipelining, and the concept of headers.

TCP 100

TCP Protocol Server Email 100

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 52

TCP Server 52

Noction

APRIL 9, 2024

Understanding BGP states is essential to grasp how BGP operates. Similar to interior gateway protocols (IGPs) like EIGRP, OSPF, or ISIS, BGP establishes peering with other routers before exchanging routing information. However,

Port 52

Port TCP Gateway Routers 52

Kentik

JANUARY 13, 2021

Send these pings using the Internet Control Message Protocol (ICMP) or TCP to one or any of the devices you believe to be involved. In some cases if ICMP is filtered, you can usually switch to TCP (Transmission Control Protocol) and use tcping, telnet, or another TCP-based method to check for reachability.

Networking 114

Networking Network TCP Protocol 114

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 52

Server TCP Ethernet Networking 52

Heroku

NOVEMBER 21, 2024

Our first thought was that perhaps the legacy router is faster at forwarding requests to the dyno because its underlying TCP client manages connections in a way that plays nicer with the Puma server. ec2:11059 tcp 0 0 ip-10-1-87-57.ec2:28631 ec2:11059 ESTABLISHED tcp 0 0 ip-10-1-87-57.ec2:30717 ec2:11059 tcp 0 0 ip-10-1-87-57.ec2:24630

Routers 59

Routers TCP Server DNS 59

Network Engineering

JANUARY 23, 2025

I have a router that uses a SIM card for connectivity, and I create a socket connection. However, this SIM card often experiences connectivity issues. After the connection is disrupted, when I attempt to send a packet from the server using the previously established socket, the router responds with a RST (reset) packet.

Routers 52

Routers TCP Firewall Server 52

Packet Pushers

MAY 2, 2024

Internet Control Message Protocol (ICMP) is the protocol that lets you test reachability: Pings, echoes, TCP connections, etc. Internet Control Message Protocol (ICMP) is the protocol that lets you test reachability: Pings, echoes, TCP connections, etc.

TCP 52

TCP Protocol Internet 52

NW Kings

DECEMBER 16, 2024

This blog will explore the key protocols within the transport layer, focusing on TCP ( Transmission Control Protocol ) and UDP (User Datagram Protocol) in detail. This layer operates on two primary protocols: TCP and UDP , each serving different purposes in data transmission. What is the Transport Layer?

Protocol 40

Protocol TCP Port Networking 40

Packet Pushers

JANUARY 26, 2024

Remote and hybrid work means network engineers have to grapple with lossy residential networks such as home wireless that your work-from-home folks are using to access company resources. Their Wi-Fi sucks, and so their use of corporate resources sucks. Sure, youve got them plumbed into a SASE fabric, but that doesnt fix their user experience.

SASE 52

SASE TCP Wireless Engineering 52

High Scalability

AUGUST 22, 2018

In the early days of the internet the internet was protocol driven, decentralized, and often distributed—FTP (1971), Telnet (<1973), FINGER (1971/1977), TCP/IP (1974), UUCP (late 1970s) NNTP (1986), DNS (1983), SMTP (1982), IRC(1988), HTTP(1990), Tor (mid-1990s), Napster(1999), and XMPP(1999). That wasn't always the case.

TCP 88

TCP Internet DNS Protocol 88

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 52

WAN TCP LAN Gateway 52

Packet Pushers

SEPTEMBER 3, 2021

Our guests have published a paper about how the TCP protocol and middleboxes such as firewalls can be weaponized by bad actors and used in reflective amplification attacks. Today's Heavy Networking podcast dives into academic research on DDoS attack techniques.

Firewall 52

Firewall TCP Networking Network 52

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 52

LAN Gateway TCP Port 52

Kentik

FEBRUARY 27, 2023

With just a few clicks, you can mine the database for TCP retransmits, TCP fragments, client latency, flow information, and dozens of other metrics. This means you can use Data Explorer to follow any line of analysis you need to solve various complex problems beyond just seeing CPU utilization and CRC errors on a pretty graph.

Networking 98

Networking Network TCP IP Address 98

Kentik

APRIL 3, 2023

event(data) duration = float(event) / 1000000 print("TCP retransmit detected (duration: %0.2f tcpdrop allows you to trace TCP packet drops. tcpconnect allows you to trace active TCP connections. tcpretransmit allows you to see the retransmission of TCP packets when an acknowledgement expires, a common cause of latency.

TCP 110

TCP Application Virtual machine Networking 110

Kentik

AUGUST 18, 2021

Convis (container visualization) is a small eBPF and Rust tool showing how to use eBPF to track TCP connections on a Linux host. From there, you can use your favorite visualization tool like Grafana or the InfluxDB UI. Watch our eBPF Summit video where we explore how to output network traffic statistics to JSON.

TCP 96

TCP Networking Network Application 96

TDAN

NOVEMBER 6, 2024

The internet is a global computer network: Consisting of a worldwide network of computer networks and Using Transmission Control Protocol/Internet Protocol (TCP/IP) to facilitate data transmission and exchange. Simply speaking, the internet is the abbreviation of internetworking, i.e., network of networks. IoT, sometimes […]

IoT 52

IoT TCP Protocol Internet 52

DoorDash Engineering

AUGUST 15, 2023

With these hooks, we can intercept and understand TCP and UDP connections across our multiple Kubernetes clusters. For TCP, we use two probes to track when a connection is initiated and when it is closed. maps"); To emit a TCP connection event, we await the tcp_close call associated with the connection established by tcp_connect.

DNS 84

DNS TCP Application Networking 84

CATO Networks

JUNE 14, 2023

MAC address in the data link layer of a packet capture Moving up the stack, at the network and transport layers, is a much more granular source of information, the TCP/IP stack. In Figure 3 and Figure 4, we can see a packet capture of a MacBook laptop initiating a TCP connection to a remote server. The post IoT has an identity problem.

IoT 52

IoT TCP Protocol Server 52

Noction

DECEMBER 5, 2022

Noction Flow Analyzer v 22.12 introduces several exciting features focused on connection state checks and troubleshooting capabilities, deployment versatility, and performance optimization.

TCP 52

TCP 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 52

Internet Protocol Networking Network 52

Teimouri

FEBRUARY 1, 2024

Although one of these protocols, the ancient TCP, has been a good fit for us for many years, its shortcomings are becoming more noticeable as our online needs grow. However, a complicated web of protocols, akin to gears operating behind the curtain, lurks under the surface of the relatively simple click-and-stream experience.

Protocol 52

Protocol TCP Networking Network 52

Kentik

AUGUST 10, 2021

For instance, a network engineer for a large government agency once told me: “We asked ourselves as a network team, are we in the business of troubleshooting application transactions and sessions, or do we terminate our responsibility at the TCP layer? Everything else is an application issue.

Networking 85

Networking Network Cloud DevOps 85

The Network DNA

JUNE 10, 2024

TCP, UDP, ICMP). Session Information: The xlate table stores TCP and UDP session state information, such as established connections and timeouts. Translated Source and Destination Addresses: After performing any NAT or PAT operations, the xlate table stores the translated IP addresses and port numbers.

Firewall 52

Firewall IP Address TCP Port 52