What is SCP?

[Vex Hilarius]

I tried googling and wikipedia but im just more confused now.

What is SCP?

[cryptodan]

Secure copy with openssh

[Jonathan Sensei]

Session control protocol - the SCP Foundation is responsible for locating and containing individuals, entities, locations, and objects that violate natural law.

[Triple G]

Syrian Communist Party
Society of Christian Philosophers

[Vex Hilarius]

I thought it was SCooP and it was J Jonah Jameson asking me to find pics of Spiderman.

[smoka-cola]

the scp (secure contain protect) foundation is a collaborative fiction on wikidot, where users submit personalized horror stories in the form of research documents (most of the time anyway) in the universe of the "foundation" which is a secret organization which contains unusual entities or items

[Jej]

Basically a group of people who write fanfiction.

[Watchful Liz]

Messaggio originale di Jej:

Basically a group of people who write fanfiction.

I would say more like creepypastas but okay.

[Jej]

Messaggio originale di l1z4rdbr34th:

Messaggio originale di Jej:

Basically a group of people who write fanfiction.

I would say more like creepypastas but okay.

Same crap, different wrapping. It's all a bunch of painful to read fan creations

[Eldin]

Secure Copy Protocol

Secure copy protocol (SCP) is a means of securely transferring computer files between a local host and a remote host or between two remote hosts. It is based on the Secure Shell (SSH) protocol. "SCP" commonly refers to both the Secure Copy Protocol and the program itself. According to OpenSSH developers in April 2019 the scp protocol is outdated, inflexible and not readily fixed.

The SCP is a network protocol, based on the BSD RCP protocol, which supports file transfers between hosts on a network. SCP uses Secure Shell (SSH) for data transfer and uses the same mechanisms for authentication, thereby ensuring the authenticity and confidentiality of the data in transit. A client can send (upload) files to a server, optionally including their basic attributes (permissions, timestamps). Clients can also request files or directories from a server (download). SCP runs over TCP port 22 by default. Like RCP, there is no RFC that defines the specifics of the protocol.

Function

Normally, a client initiates an SSH connection to the remote host, and requests an SCP process to be started on the remote server. The remote SCP process can operate in one of two modes:

• source mode, which reads files (usually from disk) and sends them back to the client, or
  
• sink mode, which accepts the files sent by the client and writes them (usually to disk) on the remote host.

For most SCP clients, source mode is generally triggered with the -f flag (from), while sink mode is triggered with -t (to). These flags are used internally and are not documented outside the SCP source code.

Remote to remote mode

In the past, in remote-to-remote secure copy, the SCP client opens an SSH connection to the source host and requests that it, in turn, open an SCP connection to the destination. (Remote-to-remote mode did not support opening two SCP connections and using the originating client as an intermediary). It is important to note that SCP cannot be used to remotely copy from the source to the destination when operating in password or keyboard-interactive authentication mode, as this would reveal the destination server's authentication credentials to the source. It is, however, possible with key-based or GSSAPI methods that do not require user input.

Recently, remote-to-remote mode supports routing traffic through the client which originated the transfer, even though it is a 3rd party to the transfer. This way, authorization credentials must reside only on the originating client, the 3rd party

Issues using talkative shell profiles

SCP does not expect text communicating with the ssh login shell. Text transmitted due to the ssh profile (e.g. echo "Welcome" in the .bashrc file) is interpreted as an error message, and a null line (echo "") causes scp to deadlock waiting for the error message to complete.

Secure Copy (remote file copy program)

The SCP program is a software tool implementing the SCP protocol as a service daemon or client. It is a program to perform secure copying. The SCP server program is typically the same program as the SCP client.

Perhaps the most widely used SCP program is the OpenSSH command line scp program, which is provided in most SSH implementations. The scp program is the secure analog of the rcp command. The scp program must be part of all SSH servers that want to provide SCP service, as scp functions as SCP server too.

Some SSH implementations provide the scp2 program, which uses the SFTP protocol instead of SCP, but provides the very same command line interface as scp. scp is then typically a symbolic link to scp2.

Syntax

Typically, a syntax of scp program is like the syntax of cp (copy):

Copying file to host:

scp SourceFile user@host:directory/TargetFile

Copying folder from host:

scp user@host:directory/SourceFile TargetFile
scp -r user@host:directory/SourceFolder TargetFolder

Note that if the remote host uses a port other than the default of 22, it can be specified in the command. For example, copying a file from host:

scp -P 2222 user@host:directory/SourceFile TargetFile

Other clients

As the Secure Copy Protocol implements file transfers only, GUI SCP clients are rare, as implementing it requires additional functionality (directory listing at least). For example, WinSCP defaults to the SFTP protocol. Even when operating in SCP mode, clients like WinSCP are typically not pure SCP clients, as they must use other means to implement the additional functionality (like the ls command). This in turn brings platform-dependency problems.

More comprehensive tools for managing files over SSH are SFTP clients.

Security

In 2019 vulnerability CVE-2019-6111 was announced related to openssh scp tool and protocol allowing to overwrite arbitrary files in the scp client target directory.

[HarleyIsntReal]

Secure. Contain. Protect.

Pretty much just a bunch of interesting creatures that aren't real. :)

[Saturday Ex-Wife Vibes]

Secure, Contain, Protect

For Secure society

[Ⓥenom Ⓢnake 🐍]

A lot of them are kind of bleh, but some of the keter class are actually kind of cool. Like the immovable obelisk, the unstoppable sphere, which actually get mentioned in each other's profiles as if the sphere ends up eventually on a path towards the obelisk evacuation of the planet is recommended.

The living breathing meat apartment. Good monster that that if you look at it, it becomes an unstoppable Juggernaut and will literally rip through anything to get to the person who looked at it and rip it into pieces. The plague doctor.

That's just a couple last time I checked they were either at or just over 2,000.

[Masque]

Sane Clown Posse.

[Jonathan Sensei]

Messaggio originale di Ⓥenom Ⓢnake 🐍:

A lot of them are kind of bleh, but some of the keter class are actually kind of cool. Like the immovable obelisk, the unstoppable sphere, which actually get mentioned in each other's profiles as if the sphere ends up eventually on a path towards the obelisk evacuation of the planet is recommended.

The living breathing meat apartment. Good monster that that if you look at it, it becomes an unstoppable Juggernaut and will literally rip through anything to get to the person who looked at it and rip it into pieces. The plague doctor.

That's just a couple last time I checked they were either at or just over 2,000.

SCP-2399 is one of my favorites.

[Tony Twist's Thunderous Right]

Messaggio originale di Boofalo Soja:

Sane Clown Posse.

I hear that their fans are called Uggalos.