All Questions
49
questions
38
votes
3
answers
71k
views
How are source ports determined and how can I force it to use a specific port
When I connect to https://www.google.co.uk this changes to 216.58.198.228:443. Then a connection to me opens on [My IP Address]:63998.
My question is how is 63998 port choosen and is there a way of ...
- 416
15
votes
5
answers
16k
views
What ports are used by an application [duplicate]
I'm testing an application which opens its own ports (acts as a server for these ports, hence listens at that ports) and where the same application connects to ports bound by other applications (acts ...
- 489
9
votes
6
answers
18k
views
Why is port 1111 open, and is it safe to be?
I'm new to systems administration and have a server running a website with HTTP (at port 80), HTTPS (at port 443) and SSH (at port 22).
I'm running Ubuntu 11.04.
I did an Nmap port scan using my ...
- 193
8
votes
3
answers
65k
views
What does it mean when a portscan shows a port as "tcpwrapped"?
Interesting ports on 192.168.1.76:
Not shown: 998 closed ports
PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 5.2 (protocol 2.0)
62078/tcp open tcpwrapped
I see tcpwrapper ...
asdad
7
votes
1
answer
60k
views
Access local webserver on port 8080 in home network using IP-Address
this is quite new to me so I hope it is clear what I try to ask.
On my windows 10 pro I have installed a small application which runs as a webserver on port 8080. I can access it using localhost:8080 ...
- 173
5
votes
1
answer
10k
views
How does TCP handle multiple requests targeted to one port?
As a server may get many requests from clients at the same time to a particular port, for example port 80 for HTTP objects, how does the server handle simultaneous requests?
- 153
5
votes
3
answers
10k
views
Cannot connect to guest OS from host OS
I have installed OpenSUSE on VMWare player as guest OS and my host OS is Windows XP. What I want to achieve is to send message from my host (i.e XP), say on port 7000 and receive it on a specific port ...
- 220
5
votes
2
answers
7k
views
Detect what outgoing ports are bypassed by firewall
My school has a firewall which limits most outgoing ports. There're only TCP/80, TCP/443, TCP/21 allowed. Is there's a way to find out all the outgoing port allowed by the firewall?
My current idea: ...
- 2,667
4
votes
3
answers
9k
views
How to force a process transmit over UDP instead of TCP?
I 'm running an ffserver process on a Linux machine, in order to achieve video streaming via ffmpeg. However, there is a delay on video streaming. On ffserver configuration file I define Port 8090.
...
- 439
4
votes
1
answer
8k
views
What is the purpose of ports?
I have a few questions in regard to the following explanation of ports I found.
The Application layer talks to the Transport layer through a port.
Ports are numbered and standard ...
- 346
4
votes
1
answer
5k
views
How can I know what is preventing my socket to bind to localhost:50060-50959
I am using this Python code to listen to a port on my Windows 10 system:
import socket
for port in (50059, 50060, 50959, 50960):
try:
print(socket.socket(socket.AF_INET, socket.SOCK_STREAM)....
- 1,728
3
votes
2
answers
2k
views
IPTables - Redirect traffic based on country
Is there any way how to allow TCP traffic only from specified countries on a specified port and the rest of traffic redirect to another IP/port using iptables ?
- 125
3
votes
1
answer
6k
views
How do networking ports work? Can I configure the ports that client and server use?
Let's say i have a "server" program listening on address 1.2.3.4:69 (i.e. remote port 69)
When i connect from a "client" program to it, typically i would specify the IP address + port of the target ...
- 471
2
votes
3
answers
7k
views
Is the same port acting as both client and server?
i find something strange in this netstat output. the output is taken using netstat -a -n -o -p TCP command on win 7.
Proto Local Address Foreign Address State PID
TCP ...
- 123
2
votes
2
answers
1k
views
Program to record data transmission between two computers using a TCP port
I am looking for a way to view data being transmitted over a TCP port between two computers.
Is there a software package that allows this? I suppose I could script something to re-route data coming ...
- 951