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

learn more… | top users | synonyms

6
votes
3answers
81 views

Can a TCP connection be terminated by an attacker if SSL/TLS has been used to protect data in the TCP segment?

I understand that SSL/TLS is built on top of TCP. That is after a TCP connection is established, an SSL handshake can be started. When it is completed, all communication will be encrypted and ...
-1
votes
2answers
157 views

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 ...
3
votes
1answer
131 views

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 ...
0
votes
1answer
40 views

How to find a spoofed packet with matching TTL?

To detect spoofed packets, TTL is recorded and it if does not match, its declared spoofed. Is there any technique to find an IP address whose TTL to the target is same as your TTL to the target ? I ...
1
vote
0answers
35 views

Inconsistent duplicate TCP packets

How often does it happen that we benignly see a TCP packet that is retransmitted but has a different payload the second time? In other words, how often is it that we see a TCP packet with sequence ...
1
vote
0answers
266 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 ...
0
votes
0answers
104 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 ...
0
votes
0answers
42 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). ...
0
votes
0answers
52 views

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 ...
0
votes
0answers
181 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 ...