ssl

Transport Layer Security (TLS), and its now-deprecated predecessor, Secure Sockets Layer (SSL), are cryptographic protocols designed to provide communications security over a computer network. Several versions of the protocols find widespread use in applications such as web browsing, email, instant messaging, and voice over IP (VoIP). Websites can use TLS to secure all communications between their servers and web browsers.
The TLS protocol aims primarily to provide privacy and data integrity between two or more communicating computer applications. When secured by TLS, connections between a client (e.g., a web browser) and a server (e.g., wikipedia.org) should have one or more of the following properties:

The connection is private (or secure) because symmetric cryptography is used to encrypt the data transmitted. The keys for this symmetric encryption are generated uniquely for each connection and are based on a shared secret that was negotiated at the start of the session (see § TLS handshake). The server and client negotiate the details of which encryption algorithm and cryptographic keys to use before the first byte of data is transmitted (see § Algorithm below). The negotiation of a shared secret is both secure (the negotiated secret is unavailable to eavesdroppers and cannot be obtained, even by an attacker who places themselves in the middle of the connection) and reliable (no attacker can modify the communications during the negotiation without being detected).
The identity of the communicating parties can be authenticated using public-key cryptography. This authentication can be made optional, but is generally required for at least one of the parties (typically the server).
The connection is reliable because each message transmitted includes a message integrity check using a message authentication code to prevent undetected loss or alteration of the data during transmission.In addition to the properties above, careful configuration of TLS can provide additional privacy-related properties such as forward secrecy, ensuring that any future disclosure of encryption keys cannot be used to decrypt any TLS communications recorded in the past.TLS supports many different methods for exchanging keys, encrypting data, and authenticating message integrity (see § Algorithm below). As a result, secure configuration of TLS involves many configurable parameters, and not all choices provide all of the privacy-related properties described in the list above (see the § Key exchange (authentication), § Cipher security, and § Data integrity tables).
Attempts have been made to subvert aspects of the communications security that TLS seeks to provide, and the protocol has been revised several times to address these security threats (see § Security). Developers of web browsers have also revised their products to defend against potential security weaknesses after these were discovered (see TLS/SSL support history of web browsers).The TLS protocol comprises two layers: the TLS record and the TLS handshake protocols.
TLS is a proposed Internet Engineering Task Force (IETF) standard, first defined in 1999, and the current version is TLS 1.3 defined in RFC 8446 (August 2018). TLS builds on the earlier SSL specifications (1994, 1995, 1996) developed by Netscape Communications
for adding the HTTPS protocol to their Navigator web browser.

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  1. B

    SSL on Private LAN + VPN access

    Hi all, the problem/topic in question is driving me crazy. I’ve looked all over the internet and although I found lots of tutorials none has worked. You are my last hope. My case: - external IP is static - NAS is accessed only in private LAN, plus remotelly using VPN (no quickconnect, port...
  2. R

    Security SSL Certificates

    Hi All, I have a question about my NAS, and the SSL certificates. I get a security report every month, and my NAS boxes flag, because the SSL certificate isn't registered against my domain, but instead Synology domain name. When i select to add a new cert from Lets encrypt, under security tab in...
  3. Robbie

    SSL Expired & No Renewal

    Ran into this today on one of my NASes - the RS819: I did the usual and clicked renew and all it did was drop an archive file with a csr and key file into my download box. I checked the Syno KB and it states that once the default self-signed expires (after a year) it cannot be renewed. The...
  4. X

    Need a process-check for setting up SSL-Secured Synology Drive connections

    (also posted this on reddit/synology, but no responses) Hi- Setting up two identical DS’s for a new client. One will be in their small office (primary NAS), the other at the owner’s home as an offsite Drive sync copy. Users will have the Drive client installed on their work machines and mobile...
  5. X

    Synology Photos app ONLY not accepting imported SSL Cert?

    Hi there, So I had an earlier issue that my connection to Synology Photos was super slow locally. This was because I was using an external address to access the server instead of an internal IP, but in terms of keeping the connection the same for the mobile app, it was required for me to keep...
  6. ed.j

    SSL Certificate - necessary?

    I am connecting to my DS main login screen through https via static IP (ie remotely). It was bugging me having to click the "certificate not trusted" warnings because the standard synology certificate is not SSL/HTTPS (I think?) So I looked into an LE SSL certificate. Took me ages but I got...
  7. B

    DSM 7.0 Certificates cannot be deleted

    I played around with QuickConnect just to see how it works. It created a QC certificate. So far so good. Then I switched back to the original Synology Certificate and wanted to delete the QC certificate. I also unlinked my QC ID from my DS 920+. The problem is that I cannot delete the QC...
  8. vivian

    Your connection isn't private - LE Cert is Valid?

    This clearly baffles me and has been for some time. Every week at various times (I have not seen a pattern yet). I get the following: I do know that the certificate needs to be valid and any URL I access needs to use that cert. Which I do and have set them all correctly in the Reverse Proxy...
  9. H

    Please Help: Issue with Nginx Proxy and SSL Certificate!

    Hi all, I've been trying to install Nginx Proxy Manager and having major difficulties getting NPM set up with Lets Encrypt. I have provided pictures of my error messages for you but I have also copied and pasted the text for your ease of reference near the bottom of this email. My current...
  10. J

    Error Failed to verify SSL with task for file server

    Hi, I have a task how run every hours. This task is for a file serveur. This task run since a few month corectly but since 4 day, i have sometimes an error Failed to verify SSL and the next run of the task, this error disapeard. What do i do to remove this error ? Many thanks Jean-François
  11. P

    Beware: ABB will silently stop working if SSL certificate is changed

    I am positing a warning for others: If the SSL certificate on your NAS is changed, all of your Active Backup for Business tasks will stop working. But it will not show up as a failure! The tasks will still show as "successful", just as of some date in the past! This is a huge issue, as you...
  12. G

    Synology Drive Windows Client and HAProxy SSL Offloading

    Hi all, I have a pfSense running HAProxy and it's running very reliable for quite a while. Recently I added an entry for TCP and port 6690, with SSL Offloading enabled, this is for the Synology Windows Client to connect. As long as SSL offloading is enabled the client will always time out...
  13. N

    Howto Block DSM redirect error page.

    Hello again. I have 443 open and forwarded to the NAS. This lets me use PhotoStation, DS Photo and DS File from the interwebs. (Plus it apparently needs to be open for Lets Encrypt). But, by the same token a Browser request to 'www .mydomain .com' - whilst not loading a page - provides an...
  14. Z

    LDAP over SSL

    Hi all, So, I've got a NAS running with its own domain and a Let's Encrypt certificate. I've got the LDAP Server package installed. When running tests, I figured out that I can connect and browse the LDAP directory over an unsecured connection, but if I try to enable SSL - it fails. Both port...
  15. B

    Question ssl certificate

    Hi everyone, I've got a domain exclusively for short links. Currently I'm using it under http but want to use it under https. What makes more sense, buying a ssl certificate and install it in synology or install certbot in my syno 918+ and generate a certificate via let's encrypt? Any advice...
  16. J

    Solved SSL Certificate for LAN

    For several reasons I do not expose my Synology NAS DiskStation to the Internet and only run Photo Station for LAN users: URL: https://nas.lan/photo local IP segment: 192.168.0.10/24 When they connect, they all get a warning, that the connection is suspicious and the certificate is not valid...
  17. G

    Solved SSL Certificate Error

    I am currently using LE certificate on a DS718+, currently tied to a Synology quickconnect address. There are no issues when accessing the DS from the quickconnect address, however when at the office locallY using the local IP or local host name we get the certificate error. Usually no big deal...
  18. jeyare

    LE SSL certificate

    I found this post for someone of you who uses LE certificates. See there: Why Let’s Encrypt is a really, really, really bad idea… Did I mention it is a really bad idea??? Link
  19. G

    VPN SSL Certificate error

    Currently using Synology’s quickconnect method to remotely connect to my nas. We’ll use DS File for this example. I am able to connect with no issues using quickconnect. However, when I turn on OpenVPN to vpn into the nas and then try to log into ds file I receive a message stating “the ssl...
  20. Rusty

    Tutorial Synology Reverse Proxy

    This tutorial will cover a few short steps that you need to know and setup in order to make your apps and services accessible via the internet (or LAN) using a specific domain name and custom (or default) port. It will also help you to avoid exposing your real IP address, custom port or simply...
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