Transmission Control Protocol (TCP) is a transport layer protocol that provides a connection-oriented data stream service with guaranteed, in-order delivery.

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How to limit source port for accessing blocked website?

My country has a firewall which blocks sites like Facebook, whatsApp etc. However, they use some kind of port blocking, so some important websites for me like Chegg is also getting blocked I think due ...
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1answer
79 views

Add SSL on top of existing TCP connection

This may sound as basic question for some but I have never done such thing. Imagine I basically have simple TCP client implemented on C# (e.g. TCPClient class) and simple TCP server implemented using ...
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0answers
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Pros and cons of disabling TCP timestamps

So, lynis informs me that I should unset net.ipv4.tcp_timestamps. I know that's a bad thing because an attacker could figure out which updates that require restarting the machine I haven't applied, or ...
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0answers
140 views

Random SYN_SENT connections to Amazon EC2?

I have looked around but couldn't find anyone else with this issue. On my console (standard asus i7 laptop) running Ubuntu 14.04 LTS - I noticed in tcptrack that there are a lot of connections being ...
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0answers
235 views

Connecting to postgres with SSL

I need help understanding some basics about the postgres database server and SSL. I am developing a Windows desktop application that will connect to a postgres database, in single user mode, with both ...
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0answers
154 views

The simplest way to emulate TCP-IP protocol violation / anomaly attacks

Reading up upon security on web applications I did not found that much info on TCP-IP and in particular HTTP/UDP protocol violation / anomaly attacks. My question: What is the general mechanism of ...
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34 views

Is this c# digital signature implementation secure?

The code connects multiple clients to a server using TCP sockets asynchronously. I have added code to attach a digital signature to the outgoing messages from the server, to authenticate the message ...
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0answers
32 views

script for analysis of tcpdump log file

I'm trying to get the following metrics from my tcpdump log file: (1) one-way delay, (2) request/response delay, (3) packet loss, (4) overall transaction duration and (5) delay variation (jitter). ...
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BitTorrent: how do cracked files get blocked and why is blocking some torrents unsuccessful/inefficient?

Not sure if this is a good question for this site, but suppose someone needs to find a torrent which contains a crack (perhaps one delivered from Hong Kong where it is legal to distrubute such ...