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Questions tagged [tls]

Questions about Transport Layer Security (TLS) protocol, which allows client-server apps to communicate across a network in a way designed to try and prevent eavesdropping and tampering.

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49 views

curl: (35) error:1407742E:SSL routines:SSL23_GET_SERVER_HELLO:tlsv1 alert protocol version /home/mohan/mesg

When I am running the following command: bash <(curl -fsSL https://mesg.com/install) , I am getting this error: curl: (35) error:1407742E:SSL routines:SSL23_GET_SERVER_HELLO:tlsv1 alert protocol ...
-2
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0answers
19 views

Upgrade OpenSSL in Debian Etch to support TLS requests [closed]

I have lot of Debian Etch devices that are running OpenSSl version which only supports SSLV2 and SSLV3 is there a way to have a support of TLSV1 requests on these systems.
2
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0answers
36 views

How to disable TLS 1.0, TLS 1.1 on Apache

I have enabled TLS 1.2 in my web server. But the http://ssllabs.com indicates that, I have enabled TLS 1.0 and 1.1 versions along with the TLS1.2 in my server. I modified my configurations files to ...
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0answers
28 views

Very slow TLS handshake on certain sites across different browsers

I am running Ubuntu 16.04 and have been experiencing a very particular issue with a certain set of webpages. The first visit of some pages (see list below) within a certain timeframe (~5min) is very ...
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0answers
49 views

Installation problem for Anbox in Ubuntu 18.04LTS

proxyconnect tcp: tls: oversized record received with length 20527 trying to install anbox in ubuntu 18.04.1 I have exported proxy in snap also but still its not working. I have installed all the ...
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0answers
42 views

16.04 SERVER USING vsftpd using tls getting ECONNREFUSED

I have 16.04 on a hosted server with a static IP. I have the ufw off for the moment to get ftp working. I configured vsftp, then I added the chroot capability. It was working fine-sign in with a ...
0
votes
1answer
118 views

TLS Downgrade error on Opera or Firefox but not on Chrome

When I try to browse some secure websites on Firefox or Opera, I often get the error "ERR_TLS13_DOWNGRADE_DETECTED", while the page loads properly on Chrome. This occurs with a lot of websites, but ...
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0answers
270 views

How to solve TLS handshake failed error? [duplicate]

I was trying to install sublime text on my ubuntu 18.04. The method I tried to install Sublime Text is to follow this link Linux Package Manager Repositories but it throws below error when I issue the ...
0
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1answer
106 views

How to send TLS syslog message via logger command

I'm working on ubuntu 16.0.4. Is there any way to send TLS syslog message by logger command? Thanks in advanced for any suggestion
1
vote
1answer
161 views

How to disable TLSv1 in Apache

I have installed Apache on an Ubuntu server, and have SSL installed through "Let's Encrypt". The SSL certificate is valid, but when running the URL of the website thought https://whynopadlock.com, it ...
1
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0answers
121 views

Internet error hanging on TLS handshake and TB at connected to pop3

Since yesterday I have a problem with my wired internet connection only on Ubuntu, Win7 works fine (dual boot), Thunderbird hangs at connected to pop3 and receives no e-mails and various websites hang ...
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0answers
171 views

Apache2 - SSL_ERROR_NO_CYPHER_OVERLAP

I have OwnCloud set up on Ubuntu server 18.04 with Apache2, which is only accessible on my internal network. It's been working fine until today I tried to access the web interface (normally I don't ...
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0answers
56 views

nm-applet (network-manager): can't connect through TLS

When I try to connect to a network through TLS authentication I get the following error in my journalctl: NetworkManager[879]: <info> [1538745226.0411] device (wlp3s0): supplicant interface ...
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0answers
342 views

SSL routines:ssl3_read_bytes:tlsv1 alert access denied connect to bitbucket

I have trouble, my ubuntu don't connect to bitbucket.org by https. I install newsletter openssl version kodix@n-kdx-30:~/tmp$ openssl version OpenSSL 1.1.1 11 Sep 2018 but error don't desappear. If ...
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vote
1answer
1k views

Ubuntu 16.04 openssl s_client write:errno=104

I'm getting the following error when trying to connect to github.com, google.com, dropbox.com via https, but stackoverflow.com, askubuntu.com and the majority of https websites work. Relevant details:...
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1answer
295 views

CA root install issue on Ubuntu 16.04 LTS Server

I am setting up nginx reverse proxy on Ubuntu 16.04 LTS Server for Web-Server. There will three different Services running on Ubuntu. Services will communicate each other using API calls. Similarly ...
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0answers
33 views

vsftpd public and ssl tls shares

Could anyone help me to solve such a problem... I have a vsftpd ftp server running with ssl tls. Here is my current conf: listen=YES listen_port=10000 pasv_enable=yes pasv_min_port=10001 ...
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0answers
43 views

How to bypass gnome nextcloud integration tls error

Whenever I set up nextcloud integration on ubuntu 18.04 the nextcloud folder shows an error Invalid TLS Certificate when I click on it. Is there any way to fix this without the admin adding a ...
0
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0answers
107 views

Issues establishing TLS connections to pure-ftpd after upgrade to Ubuntu 18.04 (from 16.04)

I had set up pure-ftpd under Ubuntu 16.04 to only accept TLS connections. My client software (SQLBackupAndFTP) was able to connect to the ftp server flawlessly. Now, after the upgrade to Ubuntu 18.04 ...
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0answers
153 views

Which Ubuntu version can I find OpenSSL with 3DES

I need to use Ubuntu system to run a python TLS client. However, Ubuntu 18 that I use has a shipped OpenSSL that does not support 3DES which I need in my application. On the other hand Ubuntu 16 does ...
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0answers
402 views

After Ubuntu update to 18.4 SSL Error: bad extension

After a update to 18.4 i cannot use ssl anymore. I can still load the page with firefox. Example 1: openssl s_client -connect www.python.org:443 -tls1_2 CONNECTED(00000003) 140370126008768:error:...
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1answer
699 views

Firefox not creating sslkeylog file after setting SSLKEYLOGFILE variable

I ran this in the terminal: export SSLKEYLOGFILE=/home/user/sslkeylog After opening regular Firefox, the developer version of Firefox and Chromium, "sslkeylog" was never created, even after visiting ...
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2answers
65 views

Building a file in Linux

I am a Windows user but I need to use a Linux tool. I am using Ubuntu. The tool's website here provided a file named: build-x86-64.sh which I installed it. It then says all what you need is to run: % ....
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0answers
665 views

TLS not working at all for Ubuntu in WSL

I recently reinstalled my computer and installed Linux Subsystem which I always do. So this is a complete new install. When I wanted to run composer I noticed something strange. It failed because it ...
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0answers
771 views

How do you connect to VPN with IKEV2 with EAP-TLS authentication on Ubuntu 16.0.4?

I've recently received three files called: vpn-host-certificate.cer company-ca-certificate.cer me.p12 My work environment is Ubuntu 16.0.4. It has been requested that I connect to a VPN that is ...
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0answers
52 views

Pure-ftpd and TLS timing out on MLSD command

I've installed Pure-ftpd on Ubuntu Server 16.04 LTS. It Is in passive mode, with passive IP address set. Port range is open in my router. However, Pure-ftpd sometimes works fine and sometimes gets ...
0
votes
1answer
250 views

FTP sync over SSL/TLS started by command line

I have webspace and develop locally. When I have finised, I want to synchronize using FTP with SSL/TLS (I do not mean openssh's sftp/scp) with my webhoster (with no ssh access so also no rsync or ...
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votes
1answer
667 views

Ubuntu 16.04 apache tls settings wont affect [duplicate]

My setup is fresh Ubuntu 16.04 server installation with Apache 2.4.18 and Openssl 1.0.2g. I have made ssl configs to /etc/apache2/mods-available/ssl.conf and checked that there are no same configs in ...
0
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1answer
264 views

Caldav (and carddav) compatible client with support for TLS Client certificate authentication

I am in search of a Caldav (and carddav) compatible client with support for TLS Client certificate authentication? The solution with Thunderbird + Lightning + SoGO connector I suggested in my answer ...
0
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1answer
258 views

StartTLS fail with LDAP mechanism in saslauthd

I upgraded my mail server from Ubuntu 14.04 to 16.04 and now StartTLS does not work anymore with LDAP mechanism in saslauthd. % sudo testsaslauthd -u clement -p bar 0: NO "authentication failed" ...
2
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1answer
781 views

Ubuntu 16.04 Firefox not creating SSLKEYLOGFILE to be used by wireshark

One should be able create an SSL Pre-Master-Secret key log file from firefox by creating the environment variable export SSLKEYLOGFILE=~/path/to/sslkeylog.log so external programs, i.e. Wireshark, are ...
1
vote
2answers
4k views

OpenLDAP error configuring StartTLS: ldap_modify: Other (e.g., implementation specific) error (80)

Configuring StartTLS for OpenLDAP. Ubuntu server 16.04 Slapd 2.4.42+dfsg-2ubuntu3.2 I have my own internal Certificate authority that is providing certificates. I have set up certificates and key: ...
3
votes
2answers
2k views

To have php 5.3.2 + Openssl 1.0.1 + Ubuntu 16.04

As I had to upgrade to TLS1.2 I had to upgrade to OpenSSL 1.0.1 or higher. To do that, I had to upgrade from Ubuntu 10.04 to Ubuntu 16.04 Ubuntu 10.04 had PHP 5.3.2 MySQL 5.1.66 Apache 2.2....
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1answer
2k views

TLS - handshake timeout

I got a problem with Ubuntu Server 16.04 on dual stack (IPv4/v6). When I request IPv4 only servers, like Paypal or DockerHub, I got TLS handshake timeout: $ curl -vvv https://paypal.com ...
4
votes
1answer
6k views

The TLS connection was non-properly terminated

I'm a beginner ubuntu user, and probably removed something I should have not to. Now when I want to open in either Chrome, Chromium or Firefox some web pages: I cannot upload photos/any file, the ...
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vote
0answers
2k views

LDAPS not working on my Ubuntu machine - 16.04.2 LTS

LDAP works fine on my machine but LDAPS does not seem to work. Tried /etc/ldap.conf and /etc/ldap/ldap.conf with the Cert names to be specified with TLS_CACERTFILE & TLS_CACERT as mentioned in ...
3
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1answer
3k views

Does Ubuntu update its root certificate authority list automatically?

Will the root CA list become outdated if I never restart/upgrade the OS? Or does Ubuntu periodically update the root CA list in the background automatically (without restart/upgrade)?
2
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0answers
553 views

Postfix: turning on “smtpd_tls_security_level = encrypt” breaks mailman

I have an Ubuntu installation (16.04) where I run postfix as my mail server, and mailman to host a couple of mailing lists I manage. I recently discovered the postfix commands: smtp_tls_security_level ...
0
votes
1answer
454 views

How is the Ubuntu root CA store created?

I know that the root store is located at /etc/ssl/certs and can be updated with update-ca-certificates. But where does it get it's certificates from? And how do browsers interact with it which have ...
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vote
0answers
41 views

What encryption algorithms over HTTPS (TLS) are supported by Ubuntu 16.10 trial version?

I am using Ubuntu 16.10 trial version with Firefox, running on a hardware-write-protected USB memory, to do online banking on https sites. My PC has Windows 10 installed on the hard drive but I think ...
2
votes
0answers
4k views

How to enable sslv3 in openssl for ubuntu 16.04

I am researching the attacks against TLS as a part of my Masters topic. But as I am using the ubuntu 16.04 the ssl3 in OpenSSL is permanently disabled here. openssl s_client -connect www.google.com:...
1
vote
1answer
177 views

Installing Ubuntu 16.04 LTS [duplicate]

Paid for and downloaded Ubuntu 16.04 TLS. I have the "ubuntu-16.04.1-desktop-amd64.iso" on a 4gb USB drive. Question How can I install the .iso file? I think I need to convert the .iso file into a ...
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0answers
366 views

Big problems with new ssl cert on aws mail server

I am at a last resort :( I have an Amazon EC2 instance that I run my mail server from. My mail server is setup with ubuntu server 14.04, postfix, dovecot and has been running fine for years however ...
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0answers
168 views

SSLSCAN not getting executed properly after removing TLS1.0

STILL A NEWBIE TO UBUNTU , please excuse if it is a silly question. I was asked to stop supporting TLS1.0 ciphers. Googled and found out that adding below line to ssl.conf can remove TLS1.0 from ...
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votes
2answers
70 views

Folder/Directory Navigation (Ubuntu 14.04 TLS)

I'm completely new to Linux/Ubuntu so apologies for the rather elementary question. Using the "save as" command, I'm trying to save e-mails (from Thunderbird) and documents (from Libre Office) to my ...
0
votes
1answer
648 views

SSMTP SSL connection null

Installed ssmtp on Xenial. Trying to send through gmail. When attempting to send a test message, syslog shows Jun 24 07:42:19 YYYY sSMTP[30547]: Creating SSL connection to host Jun 24 07:42:19 YYYY ...
0
votes
1answer
490 views

openssl update on ubuntu 8.04 [closed]

I have an old e-commerce website on an old but stable Ubuntu 8.04. We're worried about the new OpenSSL requirement for Paypal. Seems that we have to update the TLS protocol to version 1.2 and ...
1
vote
1answer
10k views

OpenVPN TLS HandShake Failed with Linux Server/Windows Client

I recently bought a Odroid C2 with Ubuntu 16.04 operating system. I have installed OpenVPN to be able to have access from everywhere to my home network. I have Samba sharing folders... I followed ...
3
votes
1answer
5k views

SSL/TLS error with links and lynx - possibly due to CloudFlare

I often work in the terminal - for example on a VPS I've set up - including for browsing with links and lynx. Unfortunately I've been getting some errors: links: Error loading https://www....
2
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2answers
4k views

How to establish a webdav connection with TLS client certificate authentication in Ubuntu?

This answer works nice for establishing webdav or webdavs connections with nautilus. However, when I try this on a webdav share secured with a self-signed TLS client certificate authentication, I get:...