Tagged Questions

0
votes
0answers
32 views

how raw socket works? why NIC pass raw socket packet without modification? [closed]

I know that libpcap and iptables works on the layer between NIC and TCP/IP stack, but libpcap is between NIC and iptables and TCP/IP stack. I'm at a loss where raw socket works. when I send a ...
0
votes
1answer
48 views

How to explicitly free EADDRINUSE port for binding it again?

$ testOnDemandRTSPServer ... Play this stream using the URL "rtsp://192.168.90.2:8554 ... ^C $ testOnDemandRTSPServer Failed to create RTSP server: bind() error (port number: 8554): Address already in ...
-2
votes
1answer
31 views

is it possible to create a server which can receive different packets from a specific port [closed]

I want to run a server process on a computer, it is binding to a port and then I want to process can receive all packets that is destined to that specific port and then I want to parse the packets ...
2
votes
1answer
63 views

Simulating a network issue for a specific application

This is somehow a developer question, but as it is more related to operating systems and network connections, I will post it here and not on Stack Overflow. I'm trying to simulate a situation when a ...
0
votes
0answers
31 views

How can I know what are the ciphersuites offered by firefox

How can I get the list of sslv3 and tlsv1 & tlsv1.2 of the ciphersuites that mozilla offers in ssl session ? I tried to write about:config in the browser and got a list but seems only for ssl3. I ...
0
votes
2answers
629 views

How can i show only 127.0.0.1 traffic using Wireshark?

Every time I try to filter to just show a specific IP Address, I get an error indicating that it is "not an interface or a field." I have no idea what that means. Furthermore, I don’t really see ...
4
votes
1answer
260 views

How does SSH tunneling work at low level?

I am interested in the exact mechanism that occurs when an SSH tunnel is stablished. Supposing we have 3 computers: LOCAL host, INTERMEDIATE host, and REMOTE host, with this topology: Localhost --- ...
-2
votes
2answers
250 views

Meaning of “netcat can be used as a backdoor” [closed]

I recently read about netcat and it is often mentioned that it could be used as a "backdoor". What exactly is meant by backdoor? Could some one give an example of such usage of netcat.
0
votes
1answer
98 views

Restricted ports to non-admins on Windows 7

I work in a restrictive desktop/network environment and I am not an admin on my laptop. The ports available to me are limited. E.g. when I tried running Tomcat, the system refused to open a socket ...
0
votes
3answers
316 views

How to enable ports on a wireless network for java socket programming

Background: I have written a java server-client program. The server accepts incoming connections on port 2175 and writes responses on 2176 which the client listens on for the response. I am sending ...
0
votes
1answer
1k views

Sending Packets to tap0 interface

I've been trying to send packets to a tap interface using python. I'm monitoring the tap interface using wireshark and no packets are being received. I'm doing this as an exercise mainly to help my ...
5
votes
3answers
785 views

Does Windows take care of closing sockets when processes exit?

I've read up this question about Linux, Can a port be bound when the process has terminated? Linux appears to clean up after processes exiting, and leaving open sockets. I was wondering if there's any ...
0
votes
2answers
165 views

is there a single-end available bandwidth measurement tool

i am doing my graduation thesis,currently i need a tool that is capable of measuring the available bandwidth between client and servers.i have googled that, the link ...
5
votes
1answer
1k views

Does Mac OS X throttle the RATE of socket creation?

This may seem programming related, but this is an OS question. I'm writing a small high performance daemon that takes thousands of connections per second. It's working fine on Linux (specifically ...
2
votes
2answers
619 views

Access machine in a subnetwork after a router

Is it possible to access a machine in a sub network? This is the situation: Main-router + sub-router - machine (2) - machine - machine - ... - machine (1) - machine - machine - ... ...
0
votes
3answers
507 views

Power socket networks: setup for home use?

I am planning on setting up a home network when moving into a new apartment. After much bad experience with wireless networks, I was going to go with a wired connection (with cat5's snaking through to ...