TCP and IP are two important protocols used in networking today. Due to their importance, the Internet Protocol Suite is also commonly known as "TCP/IP"
Questions tagged [tcpip]
464 questions
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Windows Server 2011 - System opening ominous TCP connections
Where I work we have a Windows Server 2011 Small Business edition, and recently our Symantec software started reporting "blocked intrusion attempts" from port 80. Our routers do not forward any port to the Server's 80 port, so I imagined the…
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Which parameters and setting affect network throughput when connecting two machines together without a switch?
I have a situation where I need best possible throughput (TCP/IP sockets & SMB3) between two Windows Server 2016 connect with a 1m patch cable.
I have to use existing hardware.
When you connect two Windows Server 2016 machines together directly,…
NoOneSpecial
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Is there any difference between prisoner.iana.org, blackhole-1.iana.org, and blackhole-2.iana.org?
Probably not the most useful question, but I'm curious:
I understand (in theory) that if a reverse lookup for a private IP makes it makes it past your own DNS servers you should get back "prisoner.iana.org" "blackhole-1.iana.org" or…
username
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diffrence between csma/cd and tcp/ip
I finished my middle school IT & Networking education about 2 years ago. Now I recently got a job and started to refresh my knowledge.
I've been searching the internet first of course but I still can't really seem to understand/see any diferrence…
Thimi11
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Why does TCP request packet contain ACK flag?
I am very new at low level of TCP and I am tryingtcpdump with simple socket server and client program.
The server and client follow the two steps.
Server and client make a connection.
Client sends a string message.
The below is the output of…
asleea
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can only ssh unidirectional
I have two centos 7.2 server. One machine ip is
10.104.196.18, another machine is 10.240.197.21. I can successfully ssh from 10.104.196.18 to 10.240.197.21. But failed to ssh into 10.240.196.18 from 10.240.197.21.
The ssh log is like…
Jackson Zheng
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ARP responses from host with several interfaces
I have a (experimental) setup where a host myhost.mydomain has three network interfaces all connected to the same VLAN as its default gateway mygateway.mydonain. The setup looks as follows:
interface MAC IP address
---------…
rookie09
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How do I get Kubernetes to work without the "connection over port 8080" error?
I installed Kubernetes in RHEL 7.x. I expect kubectl commands to work without errors. Port 8080 is not being blocked from my client workstation to the RedHat server with Kubernetes. I tried several things to diagnose the problem.
I ran this…
Jermoe
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OpenVPN network as part of server subnet
I have a server connected to network 192.168.200.0/24 it is our local network office's and 172.20.0.0/16 it is VPN network shared in office.
And I have install OpenVPN server on the same server in routing (level 3) mode. In order to server mode…
user419775
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Is direct hosting SMB 3.x over TCP standard or optional these days, if optional how do I make my computer use it?
I just came across this page ("Direct hosting of SMB over TCP/IP"). It's quite old, so I can't be sure if it's the standard these days. It refers to disabling NetBIOS over TCP and disabling WINS, which suggests that it's still not the standard or…
Stilez
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Slow UNC paths on virtual Windows Server 2008R2
We have a virtualized Windows Server 2008R2 running on a host Windows Server 2012R2. The 08R2 server is also running SQL Server 2008R2 SP3 (Version 10.5) and IIS 7.5.
Lately we've had intermittent issues with running SSRS on this server, which is…
Malil
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How do I allow communication between two Azure virtual networks with their own VPN gateways
I need some help (or maybe a better angle of attack) connecting a few external users to our Azure tenancy.
NOTE: All resources mentioned below are in the same Azure Subscription, the same Azure Location and the same Azure Resource Group.
There's…
Reece
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How to understand the "A subnet Example"?
In A Subnet Example of TCP/IP Illustrated, Vol. 1: The Protocols , there is a Figure and a table:
and
under the thick Line in dash rectangle, there is Ethernet, subnet 140.252.13.32, and in table, there is a column called Net ID/SubnetId with…
abelard2008
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route loop while ping one server with 3 NIC in 3 separate networks
I have this server used for testing some network parameters.
It has 3 separate network cards, each with the below IP configuration:
192.168.10.150/30 gw 10.149
192.168.152.146/30 gw 152.145
192.168.32.10/30 gw 32.9
I want to ping each network card…
PyGuy
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TCP Handshake error: SYN and SYN/ACK packets are not recognised
I have very interesting problem:
I have Proxmox hypervisor and two linux vms on it:
First vm have several nics in main bridge, each nic added to vm with certain vlan tag on hypervisor.
Second vm have only one nic in main bridge, but it have…
kvaps
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