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What are the File Transfer Protocol and FTP Proxy?
File Transfer Protocol is a protocol used to move files on the Internet. It is unique in that it uses two different connections. The control connection is used to send commands between the FTP client and the FTP server. File transfers are sent on a separate connection called a data connection. FTP packet filters can handle active and passive FTP sessions without any special client configuration. Inactive mode FTP, the FTP server establishes a data connection. In passive mode, the client establishes a connection. Generally speaking, FTP user agents use active mode, and Web user agents use passive mode. Like the FTP packet filter, the FTP proxy handles active and passive FTP sessions, but it also protects your FTP server and restricts FTP protocol commands between the client and the server. You can use an FTP proxy to: 1. Restrict the commands sent on the control channel 2. Restrict the file name or file type according to the file extension 3. Prevent buffer overflow attacks caused by abuse of the FTP protocol 4. Abnormal use of FTP commands through WatchGuard intrusion prevention service to prevent unauthorized directory traversal After adding the FTP proxy policy to the Firebox configuration, you can access the two proxy actions included in the product. You can use these rule sets without changing them, or you can use these rule sets as the basis for rule sets to meet the needs of your organization. This module shows you how to customize these two agent operations. FTP-Client This proxy operation includes a rule set that controls FTP commands launched on computers on your trusted or optional network. The FTP client application uses specific commands that the Firebox can recognize and control. Use FTP-Client operations to control the outgoing FTP traffic. FTP-Server This proxy operation includes a rule set for protecting and controlling FTP commands sent to your FTP server. Use FTP-Server operations to control incoming FTP traffic.
2021-06-24
FTPS vs SFTP: What is the Difference?
What is the difference between FTPS and SFTP? Let us first look at the technology behind each protocol, and then look at its advantages and limitations. What is FTPS? So what does FTPS stand for? The file transfer protocol is secure. FTP first appeared-but it was not initially secured. FTPS uses Secure Sockets Layer or Transport Layer Security protocols to provide connection security through encryption. This is provided by the public key certificate of the FTPS server in x.509 formats. The certificate can be trusted or self-signed. Using a self-signed certificate does not mean that the encryption level will be lower, but you must ensure that the host is who they say it is. Implicitly or explicitly make FTPS connections secure. FTPS servers usually listen for implicit connections on port 990 and explicit connections on port 21-although the server administrator can of course choose to use other ports as needed. How Does FTPS Work? The implicit connection starts when the client sends a TLS "client hello" message. This message indicates that the connection should be secure. If the server does not receive the connection, the connection will be disconnected immediately. However, if the server does receive a "client hello" message, it sends the server certificate to the client, and the client will authenticate it and use it to encrypt the session key, and then send it back to the server for the conversation encryption. For explicit FTPS, the client explicitly requests security by sending the "AUTH TLS" command immediately after establishing the connection. If the AUTH command is not sent, the FTPS server will treat the client connection as a "regular" non-secure FTP session. Interestingly, implicit connections are not listed in RFC 2228 , only explicit connections. In either case, once the session starts, the client will need to authenticate to the FTPS server-usually, this will be authenticated by a user ID and password, but can also include a client certificate if needed. All FTP commands are naturally passed along the control channel , but FTPS then requires a separate channel for data communication . By default, the data channel is port 20 for explicit FTPS and port 989 for implicit FTPS. The data channel is opened as needed and then immediately closed again . What is the Difference Between FTPS and SFTP? First of all, SFTP is not a form of FTP. In fact, FTPS and SFTP are completely unrelated and only have similarities in the structure of many commands. SFTP is not an FTP connected via SSH, but an independent protocol in itself, which uses the basic SSH protocol to provide connection security and identity verification. Because it uses the underlying SSH protocol, it is normal to use the SSH port . With SFTP, we no longer use certificates for encryption but instead use public/private key pairs that are not signed by a trusted authority. Just like the FTPS self-signed certificate, the only thing that can be doubted is who the SFTP server should be—once you are sure that you are connected to the correct server, you just need to accept the server key and continue the encrypted session.
2021-02-02
FTPS VS SFTP: Which One is More Secure?
FTPS and SFTP are two mainstream protocols for transferring sensitive files, but in terms of their security level, they are not 100% equal. Find below which is more secure. What is FTPS? FTPS is a secure FTP protocol that allows you to protect trading partners, employees, and customers and exchange files with them. FTPS implements strong encryption algorithms such as AES and Triple DES to encrypt key file transfers. For connection authentication, FTPS uses a combination of user ID, password, and/or certificate to verify the authenticity of the system. What is SFTP? SFTP is a secure FTP protocol that can send files through SSH, which provides advanced protection for file transfers. Like FTPS, SFTP implements AES, Triple DES, and other algorithms to encrypt data flowing between systems. It also provides several methods for organizations that require stronger authentication to verify the identity of the connection . FTPS VS SFTP:Which is More Secure? In terms of authentication, SFTP takes precedence over FTPS, thus making it a slightly more secure option. With SFTP, you can use a user ID and password to connect to the server, or you can use an SSH key in combination with for additional authentication. FTPS does not support this key-based authentication.
2021-01-25

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