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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Is it possible to pass TCP handshake with spoofed IP address?

Little time ago, me and my friends argued if TCP handshake can be passed with a spoofed IP address. Assume I have a https web server that allows only admin's IP numbers. Can anyone connect that web ...
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What triggers a firewall to block a TCP socket?

I was wondering what would cause a firewall to block a TCP Java socket from connecting. What would trigger that?
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Multiple SSL connections in a single HTTPS web request

I set up Apache2 with SSL and tried to request the default Apache2 web page ("It works!") using https://[IP_ADDRESS]. The Chrome developer tool shows that only one HTTP connection is established, ...
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Filtering In Iran

Since many of you already know the Iranian government aggressively uses internet censorship to block sites such as facebook, flicker, bbc, etc. The Iranian people use various methods to bypass ...
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How is the TLS protected against length field of the header being modified?

I know this question looks very silly, but, it has been bothering me for a while and I am unable to come up with an answer by myself. So, here it goes.. Packets in the TLS protocol consist of a 5 ...
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Are there any situations when one can only mount a passive MITM?

This came up while discussing Web & insecure HTTP - Using RSA for encrypting passwords on the client side Is there any such situation possible when requesting an HTTP page where an attacker is ...
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Why is the server returning 3 SYN + ACK packets during a SYN scan?

When you do a SYN scan against a opened TCP port (not filtered by Firewall), the server normally returns 3 SYN + ACK packets. So, why 3 of that? The target server is a Linux machine if relevanted ...
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TCP Sequence Prediction and it's prominence in modern systems/networks

I have a question regarding your experience of TCP Sequence Prediction that I am hoping someone could help with. I am aware of how TCP Sequence Prediction works and how the connection can be hijacked ...
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Stopping DDOS TCP SYN and UDP flood attacks

I would like to know if it's possible to stop a TCP SYN OR ICMP Flood attacks if these attacks are detected at time. What is the most accurate process to filter these addresses if the only way is to ...
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How a DOS TCP packet different from normal Packet?

a normal tcp packet shown in figure How a TCP packet that causes dos attack different from normal Tcp Packet?