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Questions tagged [network-protocols]

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16 views

How can I open new iptable's related connection?

I am reading about iptables's related connection and started wondering what if I wanted to make a new protocol, which would open new related connection. How could iptables possibly know, the new ...
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21 views

IOT rak button unable to connect to dragino gateway through lorawan

i have this iot button brand RAK lorabutton, and i'm trying to connect it to a dragino gateway through lorawan protocol in order to connect it to a theInternetOfThings server. but the problem is that ...
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1answer
4k views

SSL protocol seems to be missing in Wireshark

SSL protocol seems to be missing for me. It doesn't show up in the preferences menu and Wireshark doesn't capture any SSL packets from any program I try. I also had a failed handshake trying to just ...
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25 views

Using a proxy server with DICT protocol

I am on a machine behind an employer's firewall. I have configured this machine to use my employer's proxy server for HTTP, HTTPS, and FTP requests by setting the http_proxy, https_proxy, and ...
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63 views

Multiple connections on same port using netconn

Trying to develop a MODBUS Slave application via STM32H743BI using LwIP 2.0.3 and FreeRTOS 9.0.0 My app should be able to handle multiple clients simultaneously. I want to create seperate threads for ...
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88 views

rabbitmqctl list_queues return protocol undefined error when deployed with istio

When deploy rabbitmq helm chart on k8s with istio enabled, return protocol undefined error as follow. bash-4.2$ rabbitmqctl list_queues Timeout: 60.0 seconds ... Listing queues for vhost / ... name ...
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15 views

Does Facebook Mobile App use the same exact network protocol(s) as Facebook Web PC App?

Because protocols between the one transferring the data and the one receiving the data must be the same, I automatically assumed that both the mobile app and web PC app for Facebook use the same ...
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252 views

How can I capture and analyse LTE packets using Wireshark and LTE modem? [closed]

Is it possible to analyse LTE packets using Wireshark. I'm having trouble using Wireshark to capture mobile LTE traffic. I ma using a MacBook and a LTE modem. Do I need specific configuration to ...
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1answer
75 views

Why DNS look up is UDP?

UDP does not guarantee the message delivery Does not guarantee ordered transmission. Its connection less. But per my understanding DNS shouldbe needing all these three features while lookup. Let's ...
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1answer
194 views

What is it happening if a port is constantly (since one or more days) in FIN_WAIT1?

I've a problem when I try to communicate with a server. If I use the command line: netstat -np 10.aaa.bbb.12 where 10.aaa.bbb.12 indicates the server address; I obtain an extract with the ...
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14 views

Multicast across network segments on the intranet

I am a newcomer to network management. I am developing a tool to send/receive multicast messages on the intranet. If there are two network segments in this intranet (10.224.112., 10.224.113.), what ...
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2answers
126 views

Is a DNS packet with only a header (no questions or resources) valid?

Looking at RFC 1035 I am trying to determine what the proper response is for a packet that contains nothing but a DNS header, where all the "counts" are zero: id short X qdcount short ...
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1answer
21 views

allow other networks to connect to my computer through the internet

I am trying to create a virtual machine with virtualBox which can be accessed from other networks. I explain myself more; I have an application in my virtual machine and I want that from another team ...
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1answer
388 views

FTP/FTPS looks like it's gradually being deprecated. What are Windows + browser clients moving to and what should I provide instead? [closed]

In the past I've used FTP over TLS to let non-technical friends and family remotely access important files on my server. I've just found that they can't do so using Firefox any more, and the firefox ...
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1answer
45 views

Partial network fallout (Gmail, Facebook,…)

Firefox and Google chrome are unable to connect to gmail.com, facebook.com and a few other random sites. Most sites still work. Error message from Firefox (14-10-2018 version): Secured connection ...
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1answer
45 views

Change next hub on Comcast modem [closed]

I’m really curious about networking and I have a question. Assuming that my ISP is Comcast , my modem will forward my traffic through its public address and if the host that I’m asking for it’s ...
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1answer
56 views

List of IP protocol numbers 84 two times in list

I am referring the List of IP protocol numbers based on the wikipedia page but the number 84 seems appeared two times, is it a bug. I have to use this inside my javascript program. Here is the ...
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0answers
56 views

Adjusting the rate of an MQTT configuration

I have a problem that I am trying to solve which feels like it is a common problem and thus probably has a common solution in the form of a network protocol. My knowledge of network protocols is ...
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1answer
39 views

how to tunnel using a specific protocol

I have an internet connection where the ISP has allowed a specific set of protocols such as facebook, youtube, H.323 Data, etc on my network which are unlimited. Is there a possibility which I could ...
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0answers
142 views

Wireshark capturing only protocols SSDP, NBNS, LLMNR etc

I'm running Wireshark on my Ubuntu laptop and trying to capture WLAN traffic from my Windows laptop, but I can only see protocols as mentioned in the title: SSDP, LLMNR, NBNS, MDNS, IGMPv3. ...
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2answers
4k views

Why do I have such a low WiFi speed?

Ok, first of all I've had an internet plan for 100mbps for about two years now and my speeds looked like this: (Results from www.speedtest.net) Wired: Download - 92mbps , Upload - 94mbps WiFi (...
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1answer
112 views

How does the computer know who is the router

I was wondering, when I plugs in the ethernet cable, how does my computer know that this is a router that just plugged in? I mean, the router is allways listening and waiting for new connections, so ...
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23 views

Reference model of application/host/gateway/network levels

On page 9, RFC793 describes the place of TCP in the protocol hierarchy as follows: +------+ +-----+ +-----+ +-----+ |Telnet| | FTP | |Voice| ... | | Application Level +------+ +-...
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1answer
11k views

Which protocols are used for network share access

I want to figure out how to audit file access on Windows using network share access. I have 2 computers that run Window 8 and that are not in joined in an active directory domain. Computer 1 has ...
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1answer
58 views

How to read and interpret Packet Formats in RFCs (Request For Comments)?

Often times when I am reading Request For Comments documentation, I always see the packet format section for a protocol outlined like the one below. My question is what do the numbers and different ...
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1answer
321 views

Asymmetric Ping Between Two Windows 7 Hosts

Windows 7 Host A has two physical adapters, each with one IP: 10.20.157.10/24 10.20.159.10/24 Windows 7 Host B has two physical adapters, each with one IP: 10.20.156.10/24 10.20.158.10/24 Windows 7 ...
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1answer
2k views

Can single incoming Coaxial Cable carry signals for 2 separate services; Cable Modem ISP (DOCSIS 3.x) & Digital Cable TV Set top Box STB (DVB-C)?

Can single incoming Coaxial Cable carry signals for 2 separate services; Cable Modem ISP (DOCSIS 3.x) & Digital Cable TV Set top Box STB (DVB-C)? Single incoming Coaxial Cable with Joiner/ ...
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1answer
869 views

What is the fastest protocol for downloading files from a server on the internet

I have over 100GBs worth of files on a server sitting on a dedicated 1GBs port. Our office sits on a 100MBs port. Each of the archive files are about 1-5GBs each. What protocol would be the fastest ...
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1answer
96 views

Can i turn off a computer with just one TCP packet

So you can wake on lan, because the ethernet cables are not for data only, they transmit amperage too. If they are directly connected to the motherboard can someone throw a packet and turn off your ...
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0answers
23 views

Why is address family mandatory when using icmp with pf?

there. I wasn't able to find the answer for this question: when creating an ICMP pf rule, I must tell it's inet or inet6 address family; I would like to know why, as proto icmp is for inet and proto ...
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1answer
111 views

How to convert IMAP to POP3

I have an email server that only have IMAP interface. On the other side, I have another Special-purpose mail client (a kind of embedded system) that only accepts POP3 protocol. How can I connect the ...
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1answer
1k views

Authority section in DNS packet contains only NS records?

I'm new to DNS and I'm trying to understand the DNS packet format. From what I understand, the authority section of a DNS packet gives information about servers that are authoritative for the domain ...
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1answer
1k views

Is SOAP a transport protocol?

Is SOAP a transport protocol? if yes could you please explain how it can be defined as a transfer protocol if it's dependant on other application protocols like HTTP and SMTP?
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0answers
107 views

Does the Program Syncthing Register as Bittorent Traffic for it's Peer to Peer File Transfers?

I operate a number of different devices running various OS's (Android, Windows, Various Flavors of Linux, soon a FreeNAS server.) while at my university. For obvious reasons the university both blocks ...
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1answer
7k views

How does the protocol “mongodb” work?

To connect to a MongoDB database from a NodeJS application, the documentation says to connect an address like this one: mongodb://localhost:27017/myproject where mongodb is the protocol, in place of ...
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1answer
100 views

In which protocol web server talks to CGI?

I'm wondering what protocol is used for communication between web server, e.g. Apache, Nginx and CGI, e.g. FCGI, UWSGI?
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1answer
45 views

Which port is used for receiving email?Is it the same port for sending email SMTP (25)?

I just noticed my ISP blocked both direction for port 25. Does that mean port 25 is for both sending or receiving email? ( As email servers , transferring emails in-between) among Used to think it is ...
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1answer
182 views

Why is the ICMP protocol considered to run at layer 3 when it is a payload for the IP packet?

Why is the ICMP protocol considered to run at layer 3 on the wikipedia page ? (same layer as IP) when the ICMP protocol data is a payload of the IP packet? this is the article on wikipedia that ...
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2answers
5k views

How to make Firefox use HTTP/1.1

There is this webserver in Python (code see end of post). Whenever Firefox connects, the webserver reports HTTP/1.0. *.*.*.* - - [17/Feb/2016 15:50:59] "GET /?size=100 HTTP/1.0" 200 - With wget, ...
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1answer
66 views

Can HTTP deliver video over the internet or is that TCP?

The post below talks about delivering video content to users via HTTP. Is it confusing it with the TCP protocol? https://torrentfreak.com/torrents-time-brings-popcorn-time-to-any-windows-browser-...
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1answer
86 views

Can we restrict the usage of an SSL certificate to only a specific protocol?

I would like to generate a certificate that can be used only for HTTPS. For example, if I use the same certificate for my web server (HTTPS) and my mail server (IMAPS) using the same certificate, the ...
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1answer
1k views

Which layer7 protocol used the YouTube streaming

I want to restrict the bandwidth on YouTube in pfsense firewall. I try to setup layer7 with set the limit on http video/audio,flash, swf protocol and created the separate rule for YouTube but did not ...
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1answer
17k views

What protocol does TeamViewer use?

I was just teaching someone a little about SSH & VNC. I said I'd show him some things with TeamViewer. Then he asked me "Soo.. is this a VNC client? And I wasn't sure. What protocol does ...
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1answer
724 views

How to change my IP address on every disconnect and reconnect?

I am currently running on windows 7. I have a postpaid internet connection. A few days ago the IP always changed on every disconnect and reconnect. But now this is not happening. The same IP is coming ...
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1answer
132 views

Torrent: better to upload faster for a short time, or slower for a long time? [closed]

Let's assume that I finished to download a torrent, and now I want to seed the file, until I reach some share-ratio threshold (let say 1.0 or 1.5). What is the better strategy to be "socially fair" ...
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1answer
31 views

Is there any HandShake mechanism for GIT:// protocol?

Is there any HandShake(the connection open) mechanism when using GIT:// protocol? Just like SSh, HTTPS and...
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1answer
1k views

Print Preview with PuTTY

PuTTY is a very good application, but it doesn't have printing options, or maybe I don't know them. Can anyone help me? It's really necessary to preview what we are going to print. Another option is ...
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2answers
104 views

What does “leo://plh/” mean as part of a URL?

Someone shared a link with me, which goes nowhere. The user was on a mobile device, and the link was sent to my Gmail account. I've asked if I can share the original link (might be sensitive) and ...
3
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2answers
698 views

Whats the technical difference between sending a webpage request and sending an email?

I need some clarity on this topic. Here is what I understand: a webpage request initiates a DNS lookup and once domain name is resolved into an IP address, browser sends a request to that IP address ...
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1answer
3k views

TCP congestion control Windows 7

Based on what I read, Compound TCP is disabled by default in Windows 7. If so, which default congestion control algorithm does windows 7 use? Is it TCP RENO or NEW RENO? Could you give me some links ...