Questions tagged [ports]

Use this tag for Ethernet ports. E.g. IP:port.

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How to set different TTLHOP for TCP ports

We want to set sensitive TCP/UDP Ports at low TTL/HOP Leaving other ttl/hop at 128 default data center = 3 Priv net = 8 Internet = 128 default Ssh 22 = 8 (internal hop max) Rdp 3389 = 8 Http 80 = 128 (...
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Port 80 - how to take over from Service provider

I have high-speed broadband connection and purchased a Static IP with Service Provider. Thought of hosting a website, however, realised that the service provider blocks Ports 80 & 443 for their ...
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2answers
48 views

Connect to linux outside network without port forwarding

Currently I am running Lubuntu 19.04. Right now I am using samba to share my files on my local network ( anyone connected to my network can access the files ) Is there a way to access my files from ...
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Where are the comm ports on Windows 10? [duplicate]

I'm trying to find the comm ports on Windows 10. I've looked everywhere in device manager and went to "show hiden devices" but nothing shows up. My PC is a Dell Inspiron. Anybody else haveing the same ...
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42 views

Allow application to bind to port 80/443 on Windows

I really really need to allow an application to bind on port 80 and 443 on Windows. I understand that this is somehow blocked by http.sys. Is it possible to disable http.sys temporarily so this ...
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Is there a way to connect it to the PC without using direct serial port (or parallel port)?

I want to connect a sensor to my PC (MPU-9250 Nine-Axis (Gyro + Accelerometer + Compass) MEMS MotionTracking™ Device). I know that in the device drivers list there is the category "Sensors" (...
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21 views

Error with CSF on ubuntu / firewall

it turns out that on the PC of the "physical firewall" I have CSF installed to control all incoming traffic, and from there I route the ports to different applications located on other machines to the ...
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21 views

If I am using a VPN and using p2p with specific open ports, does the VPN server have these ports open too?

If I am using a VPN and using p2p with specific open ports, does the VPN server has to have these ports open too?
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How to set or prevent Dynamic Port Range for a single process

It is impossible to open ports for a software that use a Dynamic Port Range (Ephemeral Port). Under Windows I can set the whole Dynamic Port Range with: netsh.exe interface ipv4 set dynamicportrange ...
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1answer
98 views

Why do most application protocols have two ports assigned?

So I am trying to learn about the application layer in the OSI model and when I go to the IANA website, I notice that most of the well known protocols have same port assigned for TCP and UDP. For ...
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22 views

host mutliple servers on the same port?

Okay, I have two physical computers on my one network, they are both running CSGO servers. Let's call them Server A, and Server B. Server A and Server B are both set to bind to the same port. But, ...
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263 views

IP camera streaming to app without any open ports

I have three no-name ipcameras that I have been fooling around with. Previous ones came with a webserver that used UPnP to make them accessible outside my home network. These ones use an app, but I ...
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153 views

Windows 10 VPN host does not accept connections

I've been trying to setup the VPN hosting in Windows 10 Pro. On the VPN host setup New Incoming Connection added dedicated user for connection specified acceptable IP range allow clients to assign ...
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459 views

USB xHCI Controller Host won't start Code 10: An invalid parameter was passed to a service or function + USB failures

It's been happening since i changed all my hardware including motherboard. I've tried reinstalling the driver through Device Manager but it won't work. Another issue that happens is that my Wi-Fi ...
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1answer
479 views

Docker container available in browser but not in curl

I have a running gitlab container. The run command: sudo docker run --detach \ --hostname gitlab.domain.com \ --publish 8888:80 --publish 2222:22 \ --name gitlab \ --restart always \ --...
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73 views

connecting linux computer using vnc

I'm trying to connect to a linux computer using a vnc viewer, but the connection times out. when I type netstat -na, none of the ports listed are 5900, which as I understood is the one VNC uses. Is it ...
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76 views

iptables on Ubuntu18.04 doesn't filter when changing default-action to DROP

I am facing a issue on a freshly set up Server in the Hetzner-Cloud running Ubuntu 18.04 LTS. After installing Iptables(-persistent) and configuring the following ruleset: root@inetsec:/home/linus# ...
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502 views

Issue with openeing port ZTE H268N V1.1.0_OJ.1T3

guys, I have an issue with I had Router (Sagemacom ) I opened the ports all and it was work till I bring a new router ( ZTE H268N ) I tried to open the ports in EVERY Way I'm sure 600% of my ...
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430 views

Installation new domain controller throws error about used ports (88)

When I configure my server as the first Active Directory domain controller in a new forest in Windows Server 2016 I get error as below: Verification of prerequisites for Domain Controller promotion ...
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423 views

Port Forwarding Port 80 to PS4 - what about other devices on port 80

I would like to forward several ports, including port 80, to my husband's PS4 for gaming purposes. On our network I know that there are a few other devices using port 80, notably a nanny-cam. These ...
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61 views

Cant access open ports on local network including server, but can externally

I have recently purchased a new server, I have a pretty infuriating problem where ports that I open are accessible to external devices but can't be accessed by any device on the local network and even ...
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1answer
211 views

assigning com ports to usb ports of a usb hub

I am starting to automate my lab and for that I need to connect 8 devices to my computer (not enough USB ports). All of them can communicate through a virtual com port. My question is that if I ...
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1answer
258 views

What are the risks of hosting my own website with WAMP?

I already know everything I should do to, but most of the guides out there just state that opening port 80 is very risky. What are those risks, in practice? I would use WAMP and WordPress, do they ...
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21 views

Anyway to connect A/V cables to a laptop?

I want to connect the red, white and yellow A/V cables from an A/V camera receiver to my laptop so that I can cast the video from the camera to my laptop screen. But there are no A/V ports in my ...
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1answer
50 views

Setting up a SSH jump host for forwarding?

I am trying to configure a machine, B, as a proxy which means that incoming ssh connections get silently redirected to another host, for example C. As the guy who initiates the connection all I have ...
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58 views

Attempts to publish RabbitMQ data seem to be blocked

I am using RabbitMQ for syncing data between two applications. These applications reside in 2 different countries—the U.S. and China—and RabbitMQ is being accessed from both the locations. Sometimes ...
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42 views

Node-exporter default null port

I tried run Prometheus, node-exporter and cadvisor through docker-compose on debian sever but facing with port problem. Node-Exporter got error (default port was using with another procces), after I ...
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4k views

What computer port is this? [closed]

My Lenovo X1 Carbon (6th gen) supposedly has a MicroSD card reader. But I have never had to use a MicroSD card reader before and I couldn't identify this port. I tried to put the microSD card in, but ...
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1answer
613 views

How to determine what is filtering port?

I have a number of devices they are used in electric power SCADA system, which are connected to GSM routers to send the data to a server by means of two ports 2404 and 9002. Some times the server can'...
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24 views

Flashing bios chip with i/o ports?

I'm using lenovo b490 laptop. recently bios failed on my laptop. Blank screen appears when i turned on my laptop. I'm trying to flash bios from the usb or other i/o ports. Is there any way to flash ...
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1answer
42 views

How does nc identify service names

root@nanana:~# nc -zv localhost 5432 Connection to localhost 5432 port [tcp/postgresql] succeeded! How does nc find out that postgres is listening on the port? just by common port numbers and by ...
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77 views

How can I prevent the Media Centre Extender from recreating port rules?

I have a windows 10 PC which hosts a web service for an application, so there is a port rule for it to come through 7778. Recently a rule is overwriting the web service one causing it to stop working, ...
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87 views

What am I missing in port forwarding?

I am trying to forward a specific port on my router with listening to that port number, but when I run canyouseeme tool, it shows the connection is refused. I made the inbound rule, no firewall no ...
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256 views

Port Forwarding vs Port Triggering for online game Elder Scrolls Online

My system is Windows 10 on a TP-Link WDR3600 router (no VPN). I use this computer for banking and other important things. I'm no network engineer but I've heard port forwarding puts you more at risk ...
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1answer
2k views

Can not forward docker container port to host

I am trying to forward docker container to host machine. I am using following command docker run -d -p 80:8000 nginx I have tried very hard, but not able to access nginx from http://localhost:8000 ...
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1answer
647 views

How can I properly open ports for local traffic on a windows domain profile?

I'm trying to open port 23 on a windows firewall, specifically a domain profile. The purpose is to allow communication from computers A and B to computer C, all are on the same domain. When I open ...
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46 views

Can I run my server on SSH port?

I set up server for a game on my PC and by default it works on port 25565(minecraft!) and I want people from outside my Uni network to connect to the server. I want to know if there's any way to use ...
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1answer
584 views

Restrict Chrome to using only a very small range of ports?

Is there a way to restrict Google Chrome to using only a very small range of Local Ports? Presently, Chrome is using a large range of high-numbered ports. I'd prefer to be able to more precisely ...
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1answer
12k views

How to open port 8080 on windows 10, configure firewall and any other settings?

I have a Windows 10 computer. I am attempting to get my WAMP web server on the web but have been and continue to be unsuccessful. I believe I narrowed it down to windows though. My Motorola Cable ...
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110 views

cant run xampp apache with LabView

I have xampp installed, and i am using apache with ports 8080 and 4433. When I installed National Instruments LabView, I couldn't start xampp apache anymore. after reading a bit. LabView includes ...
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295 views

Automatization of port scan proccess

I have a task in my company, that I need to scan all open ports from my external range of IP's and I need to create something to do this task every week or month and update the results with the new IP'...
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691 views

How do I Block a Port on all IPS, except 1?

how do i block a port on all IP's except 1? say I have IP's: 192.168.1 192.168.2 ex: how would i only allow port 21 on 192.168.1 through IP tables or similar?
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2k views

Is it normal for screws on PSU to have electricity?

I was getting electric shock from my USB ports, so I decided to check. All the ports on my motherboard also have electricity (I'm using a tester to test it). There fore I removed my motherboard ...
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787 views

Windows: how to bind to <1024 port as standard user?

I was wondering if there was a way on Windows to bind to a <1024 port as a standard user? I am aware that this requires Admin privilege but can I approve the request with Admin but run the actual ...
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1answer
46 views

How to log all ports once opened by a process/app in Linux for short time?

I have an app that makes some kind of upd ping to the network and for some short time listens for some port in order to receive some feedback during some timeout. It is short enough to observe if with ...
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49 views

Connect to Windows Server 2012 on specific ports

Try to connect to your computer on ports (135÷139,445), for example by connecting to a shared folder (C$). You can use "net use" command. Hey, I'm making security exercises (Firewall stuff), but I'...
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1answer
2k views

How long would it take to perform different port scans on all 65536 ports?

I am currently using Nmap to map local networks in part of my program, and I was wondering how long it would take to perform different port scans on all ports? What is the timeout and average packet ...
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416 views

Second router in home network - how to setup properly

today I got a router to split my home network in two partitions to isolate some devices. In particular I have Raspberry Pi which I would like to access from the internet and keep all my other devices (...
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340 views

Not able to connect to VM from web browser with SAS University Edition

I have installed SAS University Edition through Oracle Virtual Box as intended. The user is meant to connect to SAS from outside the VM via a web browser. Unfortunately, I am unable to make a ...
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2answers
477 views

Doing forensics using PowerShell in Windows, linking ports to applications

In order to correctly do forensics; in finding vulnerabilities, that the security team has revealed in their security scans. The two commands I use mostly do this job is: c:\ netstat -abno | find "...