Questions tagged [tcp]

TCP stands for Transmission Control Protocol and is one of the core protocols of the Internet Protocol Suite. TCP complements the Internet Protocol (IP), and therefore the entire suite is commonly referred to as TCP/IP.

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VM Instance - Network Router in use

Hello guys anyone with an idea how i can get google to configure the network router hosting/supplying internet to the VM instances to allow traffic both UDP and TCP port 4500 for any IP address.
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Server Response HTTP

Here below is a response from the server and i wonder where i can see the TCP connection policy with which the server responds? HTTP/1.1 200 OK Connection: Keep-Alive Date: Sun, 20 Sep 2020 12:34:56 ...
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High network TCP connection times

I have (somewhat unsual and random) high connection times between machines and local network. To simplify I have this script which constantly curls to a very simple traefik API endpoint #!/bin/bash ...
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RTMP / TCP extra byte in packet?

I'm analyzing the RTMP(Real-Time Messaging Protocol) and found something really weird. In one of the captured packets, the TCP payload length is longer than expected. Here's the packet in Wireshark: ...
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Handling Socket Exception error in TCP server

I have a Unity (C#) TCP server listening for clients at regular intervals. The client opens the socket, sends a message and then closes the socket. Every couple hours the server is throwing the ...
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Apparent random slowniness on apache 2.4 on HTTPS and HTTP

Hello currently I experience random slowniness in apache 2.4.18 on HTTPS on Ubuntu server 16.04. Here follow observations, symptoms and info: it doesn't happen with HTTP it doesn't happen with about ...
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689 views

How do I dump raw data from a TCP port in Windows using the netsh command?

I have an apparently simple issue which is proving very difficult to find an answer for. The site has a highly-secured Windows Server 2019 installation and an appliance connected to it running on a ...
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rsync broken pipe between two servers on different networks

I have two FreeBSD servers, both on different networks, with a firewall in between. I have no control over the firewall. Server 1: IP: 10.1.0.2 GW (firewall): 10.1.0.1 Server2: IP: ...
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MTR showing packet loss rather consistently, but other tools are not

Using MTR (using TCP, not ICMP), I'm consistently seeing packet loss on one router that does normal ICMP flood limiting. UDP does the same - I still see the loss. However, when I use other tools, ie, ...
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How companies use single VIP for multiple L4 services

I have two public IP's alloted by network team NAT'ed to two private IP x.x.x.2 and x.x.x.3. This private IP is assigned as a VIP on my Load Balancer. I am wondering how these two VIP's can be used ...
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Kubernetes API server unexpectedly stops responding

I have a managed Kubernetes cluster in Azure (AKS). There is one pod running a simple web service that responds to REST API calls from outside and calls the Kubernetes API server. These calls list and ...
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Hyper-V VM's LocalPorts blocked

I am having issues with Local ports on hyper-V VM's I have enabled Hyper-V on my Windows10 laptop and Deployed windows 2019 sever Virtual machines to create the SCCM Lab environment. All Virtual ...
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Is there a way to get tcp retransmit count PER PORT/SOCKET?

We hit an issue with one of our Kafka brokers (running over AWS EC2) suffering from many TCP retransmits. We'd like to know which of the TCP connections it has open suffers from this. Is there a way ...
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Connect multiple clients to a special purpose TCP server that accepts single connection at a time

I have a server and clients A and B. Clients A & B are identical. As of now, client A connects to the server over a persistent long living TCP connection. Currently if I want to do maintenance ...
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Read a header of a https request inside a proxy

I have implemented a custom proxy server to routing my network traffics. I have two or more browsers and installed a browser extension in each browser. The browser extension will append two different ...

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