Questions tagged [tcpip]
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"
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tcp previous segment not captured
I'm attempting to remotely control a device with c code. I could not send commands. I'm also not able to see the commands entering Wireshark either. Whenever I execute the code, it displays the error ...
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Can two LAN networks both at one level behind a router higher up the routing chain use the same subnet mask and network ID? [duplicate]
Can two LAN networks both at one level behind a router higher up the routing chain use the same subnet mask and network ID? See the diagram below.
This question was already answered here, but I am ...
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Is there a way to detect which requests have been made using same connection in Apache log?
I use mod_log_config and mod_log_forensic to log all requests made to an Apache server.
Some of those requests use Keep-Alive and I would like to find out which requests have been made using the same ...
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Change DHCP range and tcpip connections
I want to change the dynamic range of my DHCP server for a network e.g. it is at the moment from 192.168.0.2 to 192.168.0.100 I want to move it from 192.168.0.101 to 192.168.0.200 but I don't want to ...
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Iptables rule to capture DHCP I/O fails
I have stumbled upon a peculiar issue with Iptables. I am not seeking a solution to a problem, but an explanation of some strange behaviour of iptables.
My platform is Ubuntu 22.04.2 LTS with 5.19.0-...
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Continuous [ACK]Packets Without any Response From Receiver
Our application sends some data to one of our devices via TCP/IP, However communication in between not working as it should be.Because TCP/IP is bidirectional, so if one side sends data to other, ...
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How to find out if TCP connection to server is being tampered with by third-parties?
I'm under an unreliable ISP/AS, something like the GFW. They actively try to sabotage a TCP+TLS session by attacks such as sending SYN RST to established connections, making the connection timeout, ...
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How can I connect two routers to the same switch
First of all, I'm not talking about those all-in-one routers that do wifi/switching/routing. It drives me nuts when people call a Wifi box a "router". Anway, I would like to do the ...
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TCP Session drops because of FIN signal
I have two servers communicating with each other through ISO 8385 messages over TCP sessions. Basically host-to-host interface between two payment switches. The problem is that the session keeps ...
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Are there any additional security considerations to be taken into account when activating IPv6 as opposed to IPv4?
As a sysadmin, I'm fairly experienced with IPv4. As such, I feel comfortable configuring firewalls to expose servers/services to the Internet with public IPv4 addresses.
I have a basic understanding ...
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Can two servers talk to each other via TCP by this configuration? [duplicate]
This is an interview question:
There are two servers on Rank A, setup the network on the two hosts by following configuration:
Server A: ifconfig eth0 10.10.15.129 netmask 255.255.255.0 up route add ...
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Long latency to reply a TCP ACK
k8s environment(4 nodes, rke 1.21.5)
We noticed there is randomly significant latency in socket data transferring between different k8s pods. Latency could be as long as 15 seconds in some cases.
By ...
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Docker container unable to connect to one specific external IP, yet host can
This is a puzzler, and I'm hoping that by writing a StackOverflow question, I gain some fresh insights.
In a nutshell, I'm trying to figure out why I can access https://sts.nih.gov from a host machine,...
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TCP packets being lost
I have some TCP packets being lost. I have monitored the interface with tcpdump pcap file - https://www.dropbox.com/s/7m3hr1b7065tenx/tcp.pcap?dl=0
I noticed that when I lose packets I only get 5 ...
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Is there a registry value to force a connection to close?
I have an ethernet connection that I want to close if it's not sending or receiving any data. Is there a registry value I can set or any configurations I can change?
For windows 10, thanks
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