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TCP: can two different sockets share a port?
...n is uniquely identified by the combination of client-side and server-side IP/Port pairs. Multiple connections on the same server can share the same server-side IP/Port pair as long as they are associated with different client-side IP/Port pairs, and the server would be able to handle as many clien...
How can I get the MAC and the IP address of a connected client in PHP?
I need to know the MAC and the IP address of the connect clients, how can I do this in PHP?
16 Answers
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What is the Difference Between read() and recv() , and Between send() and write()?
...). However, it didn't work when I tried to send binary data that included character 10. write() somewhere inserted character 13 before this. Changing it to send() with a flags parameter of 0 fixed that problem. read() could have the reverse problem if 13-10 are consecutive in the binary data, bu...
What is the best Distributed Brute Force countermeasure?
... whitelist, and then - and here's the trick - not blocking non-whitelisted IPs, just throttling them to hell and back.
Note that this measure is only meant to thwart this very specific type of attack. In practice, of course, it would work in combination with other best-practices approaches to au...
ping response “Request timed out.” vs “Destination Host unreachable”
When I ping an IP address, what is the difference between Request timed out and Destination host unreachable returned from the command?
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How do multiple clients connect simultaneously to one port, say 80, on a server? [duplicate]
...erstand the basics of how ports work. However, what I don't get is how multiple clients can simultaneously connect to say port 80. I know each client has a unique (for their machine) port. Does the server reply back from an available port to the client, and simply state the reply came from 80? How d...
Comparing Dates in Oracle SQL
...r by using the built-in TO_DATE() function, or a date literal.
TO_DATE()
select employee_id
from employee
where employee_date_hired > to_date('31-DEC-95','DD-MON-YY')
This method has a few unnecessary pitfalls
As a_horse_with_no_name noted in the comments, DEC, doesn't necessarily mean D...
Vagrant reverse port forwarding?
...ing accounting for vagrant's potentially differente config if you have multiple vagrant setup: vagrant ssh-config | ssh -F /dev/stdin $BOX -R $PORT_VM:localhost:$PORT -N
– ibizaman
Nov 11 '15 at 10:36
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Can't connect to localhost on SQL Server Express 2012 / 2016
...not, start it.
You need to make sure that SQL Server is allowed to use TCP/IP or named pipes. You can turn these on by opening the SQL Server Configuration Manager in Start > Programs > Microsoft SQL Server 2012 > Configuration Tools (or SQL Server Configuration Manager), and make sure that...
Find the IP address of the client in an SSH session
I have a script that is to be run by a person that logs in to the server with SSH .
19 Answers
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