Transport Layer Security is a cryptographic protocol for encrypting and authenticating network communications, and replaces SSL. It is commonly used to secure Internet protocols such as HTTP.

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11 views

How to check if clients connect to IMAP/POP via TLS or SSL?

I am willing to disable SSL on my dovecot servers (Debian GNU/Linux), leaving TLS as the only option. Before doing so, I would like to know who is still connecting via SSL with older or misconfigured ...
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0answers
11 views

Send data over DTLS with socat

I'm trying to exchange files over DTLS with socat with one-liner client/server. I'm able to do it with UDP: server:socat -d -d -lh -lu UDP-LISTEN:5000,reuseaddr,fork OPEN:out.dat,create client:socat ...
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3answers
94 views

Windows Server 2008 R2 - SHA2 based Cipher Suites

I am currently in the process of upgrading the SSL certificates for various websites that I manage from SHA1 to SHA2 compatible certificates. To date we have always used 'RSA' as the key exchange ...
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2answers
37 views

Consequences of disabling SSL2 and SSL3 on our webserver

Our system is quite old and as a result gets an F grade for SSL from Qualsys SSL because the server supports SSL2 and SSl3. We have now identified all the browsers people are using. The oldest is ...
3
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2answers
37 views

How to create TLS SHA256 certificate request

One of our business partners is requesting us to use a TLS SHA256 certificate to connect to their APIs. I am not sure how to generate these requests. I have used openssl in the past to create these ...
1
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1answer
53 views

nginx: How to log TLS error (if unsupported ciphers / protocol)

I'm in the progress of switching to 100% https. Server is running nginx+libressl. Before going https:100% I'm interested in seeing which clients would no longer be able to connect to my site. E.g. ...
2
votes
1answer
587 views

Node.js with SSL/TLS protocol v1.2

I would like to use TLS 1.2 on my node.js server. I'm currently using openssl 1.0.0e. If I upgrade to openssl 1.0.1, do I need to rebuild node.js to upgrade to TLS 1.2? Are there configuration or ...
2
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1answer
40 views

Reverse proxy TLS version

I have a TMG 2010 (Forefront Threat Manager Gateway 2010) sitting on Windows Server 2003 R2 and I have several websites published through it. One of the websites is sitting on Windows Server 2012 R2. ...
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0answers
31 views

Outlook/Exchange certificate errors after setting clientaccessserver, etc… properties

After updating exchange 2010 using the commands for Set-ActiveSyncVirtualDirectory, Set-ClientAccessServer, Set-ECPVirtualDirectory, Set-OABVirtualDirectory, Set-OWAVirtualDirectory, & ...
4
votes
1answer
36 views

Completely getting rid of SSLv3 on Apache

Our security team is asking that we completely disable SSLv3 on some of our servers running Apache. I've used the SSLProtocol entry in the ssl.conf file (like SSLProtocol ALL -SSLv2 -SSLv3) and ...
0
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1answer
43 views

Weblogic Mitigate POODLE vulnerability after upgrade and still use CBC ciphers

I recently upgraded my Weblogic server to 10.3.6 with java 7. So with that I have TLS1.0 - TLS 1.2 enabled via the setEnv.sh. Some of the ciphers I am using to make sure that they are compatible ...
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0answers
46 views

Nginx TLS renegotiation

Our webserver has recently failed a PCI compliance test due to existence of "TLS Session Renegotiation Vulnerability" (CVE-2009-3555) However I'm not sure whether those results are right. We're using ...
2
votes
1answer
88 views

IIS 7.5 and above - enable schannel cipher DHE_RSA_AES_128_GCM following patch KB2992611 - Is this safe?

I recently became aware that following the release of patch KB2992611 in November, Microsoft made available four new cipher suites for schannel (and thus IIS); TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 ...
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votes
0answers
14 views

Steps for setting up certificate based authentication

We have developed wcf service which we need to expose to customers. We plan to use certificates for security and authentication of clients. How do we go about this, what are the steps involved? ...
1
vote
1answer
51 views

SSL_VERSION_OR_CIPHER_MISMATCH in chrome 42

My ssl-enabled site has stopped working in Chrome 42. It still works in Chrome 41. Qualys's test doesn't cover Chrome 42, but it also doesn't raise any issues that indicate it's about to stop ...
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0answers
250 views

Your connection to website is encrypted with obsolete cryptography in Chrome [closed]

I can see the warning in about the our SSL certificate. This is chrome browser alone. See the below screenshot. I have check this problem in some links, they mentioned there is problem in key ...
-2
votes
0answers
33 views

SSL Made my Subdomain Inaccessible

I have an SSL certificate which is for the root domain https://diginomics.com domain only. However, after I successfully installed the certificate it also changed the URL of my subdomain ...
1
vote
1answer
60 views

How to disable RC4 in Windows 2012?

I want to disable RC4 in Windows Server 2012. From this link, I should disable the registry key or RC* [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Ciphers\RC*] ...
2
votes
1answer
19 views

How to check SSL connectivity between certificates installed on two different server

Suppose there are two organizations which share information with each other. Every organization installs SSL certificate in their application server and provides the same certificate to other ...
2
votes
1answer
1k views

VSFTPD - FTP over TLS - Upload stops after exactly 82k?

I installed a VSFTP daemon on a CentOS server, using a RSA certificate for logging in using explicit TLS. Now, I cannot upload more than 82k. With files under that limit, there is no problem. The FTP ...
2
votes
1answer
1k views

TLS from Radius for Wifi is rejected by Win7

We do have the following Setup at our company Synology RS812+ hosting LDAP, RADIUS, DNS (Version DSM 5.0-4458 Update 2) 2*Cisco Wifi APs WAP561 (Firmware 1.0.3.4) Cisco Router ISA500 (Firmware ...
1
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1answer
31 views

Freeradius TLS cetificate(win 7 and previous)

I'm configuring FreeRADIUS 2.2.6. I use TLS because TTLS is not supported by windows 7. With Windows 8.1 the WiFi connection works very well without installing certificate With Windows 7 and ...
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2answers
2k views

Disabled SSLv3 to combat Poodle now cannot connect to SQL “Connection forcibly closed by remote host”

I have disabled SSL3 on my web server to combat the Poodle Vulnerability and now I am unable to connect to my SQL server using SQL Authentication. I just get "Connection forcibly closed by remote ...
0
votes
1answer
188 views

How to update libssl for TLS_FALLBACK_SCSV vulnerability on nginx configuration?

I can't get the TLS_FALLBACK_SCSV to work when testing on SSLabs, keeping me from an A+ rating. Seems it an issue of libssl, not nginx configuration. I have updated to OpenSSL 1.0.1k 8 Jan 2015, but ...
15
votes
1answer
16k views

How to inspect remote SMTP server's TLS certificate?

We have an Exchange 2007 server running on Windows Server 2008. Our client uses another vendor's mail server. Their security policies require us to use enforced TLS. This was working fine until ...
0
votes
1answer
69 views

Can I configure IIS 7.5 Forward Secrecy to redirect for unsupported browsers (I.E.)?

I have successfully configured Windows Server 2008 R2 with IIS 7.5 serving my Asp.Net 4 application for forward secrecy utilizing the information from here I still have visitors/user with downlevel ...
8
votes
4answers
10k views

Is STARTTLS more safe than TLS/SSL?

In Thunderbird (and I assume in many other clients, too) I have the option to choose between "SSL/TLS" and "STARTTLS". As far as I understand it, "STARTTLS" means in simple words "encrypt if both ...
0
votes
0answers
17 views

vsftpd service with tls enabled exit code 2

I am trying to set up TLS for VSFTPD on CentOS7. Whenever I try to start the service it fails with exit code 2 and no other information. anonymous_enable=NO local_enable=YES write_enable=YES ...
0
votes
0answers
18 views

JPG file and other of higher size not downloading

We have a SAP application for official use wherein all the documents are uploaded and saved in a server and from where it can be downloaded by anyone after logging in the server with his/her user ID. ...
1
vote
1answer
16 views

Verify TLS encryped communication when querying LDAP server?

I have a web application (not hosted on windows) that authenticates users by querying an LDAP server (a windows domain controller). The app is configured to use STARTTLS to encrypt communication with ...
2
votes
0answers
41 views

rabbitmq-shovel amqps connection handshake failure

I fail to setup a rabbitmq shovel over amqps. The same shovel works fine over amqp. my (edited) uri: ...
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1answer
39 views

DHE cipher suite issue

I am now using this cipher suite: SSLCipherSuite ...
0
votes
1answer
124 views

LDAP Replica with TLS

I'm having trouble to run the replica LDAP with TLS, without TLS, all works !! Provider and Consumer are identical CentOS release 6.5 rpm -qa | grep ldap openldap-clients-2.4.23-34.el6_5.1.x86_64 ...
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0answers
59 views

openvpn TLS handshake fails on client because firewall drops packets (but why?)

I seem to have problem with my openvpn server - client connection. now, the important information is in the log (verb3) of my client: Mon Mar 30 17:09:59 2015 OpenVPN 2.2.2 ...
0
votes
2answers
53 views

SSL cipher suite usage statistics based on captured data

Is there a reasonable method of building SSL cipher usage statistics based on captured packets? Let's say my web server supports a set of ciphers and I would like to find out how many clients ...
9
votes
1answer
466 views

Why is Internet Explorer 11 unable to connect to HTTPS sites when TLS 1.2 is enabled?

Normally I don't use Internet Explorer at all. I use it only in design time for interface tests (development machine and with unencrypted http). Every week I run the SSL Labs server test which says ...
11
votes
3answers
9k views

Fixing BEAST vulnerability on Apache 2.0 running on RHEL 4

I have a web server running Apache 2.0 on RHEL4. This server recently failed a PCI scan. Reason: SSLv3.0/TLSv1.0 Protocol Weak CBC Mode Vulnerability Solution: This attack was identified in 2004 and ...
2
votes
2answers
86 views

How to set up TLS on hMailServer?

Complete noob here. Please be gentle :) I have a Windows 2008 server, running hMailServer. Right now all my communication is unencrypted. I want to start using TLS. So now I've got myself a SSL ...
0
votes
1answer
29 views

SMTP doesn't work on distinct machine [closed]

I'm trying to setup TLS e-mail on remote machine, but it doesn't work. Trying to send e-mail on my local machine (Windows 7 x64 locale ru-ru): 16:33:18 CONNECT : Looking up host name ...
4
votes
2answers
55 views

Is it necessary to purchase an OID for ADCS?

I am interested in utilizing ADCS to generate trusted certificates for internal web applications. However, from my readings it appears that I need to purchase an OID, which looks pretty expensive. Is ...
0
votes
0answers
46 views

How to configure HAProxy to use SNI for SSL enabled backends?

I have several backend web servers that have multiple vhosts and I want to use HAProxy in front of them. It doesn't appear that HAProxy is sending the hostname in the TLS connection to the backend ...
-1
votes
1answer
78 views

Problem with TLS identity not verified

I run a CA server "Microsoft CA Server Enterprise" and I generate certificates then bind the cert to my site. In all clients in my network, I add the cert with certutil -addstore ca org.cer When my ...
0
votes
1answer
33 views

Confused about SSL certificates needed for Windows proxy

I am completely new to security, and I'm confused about what kind and how many SSL certificates I need. I have a REST API server running on a windows server 2012. It's currently listening to HTTP ...
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votes
2answers
29 views

Exim log file errors

1- What is the meaning of these lines in /var/log/exim/main.log? I have these lines repeated more than 700 times in main.log 2015-03-16 21:30:57 TLS error on connection from [192.0.2.1] ...
0
votes
1answer
120 views

Postfix STARTTLS only on port 25

I want to enable STARTTLS on port 25, but for unknown reasons it only works on port 465. master.cf: smtp inet n - - - - smtpd -o syslog_name=postfix/smtp -o ...
2
votes
2answers
378 views

How do I log tls-encrypted smtp traffic?

I'd like to know what my local postfix says to the Amazon SES smtpd after the STARTTLS. In plain text, so I can understand it. Amazon SES requires TLS, so I can't temporarily turn it off. I currently ...
0
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0answers
42 views

gandi sendmail tls slow

I set up a Debian with Sendmail && SSMTP to be able to send mail through my Gandi Mail Account. It works fine, except that the authentication took like 5 seconds to be established which can ...
0
votes
2answers
1k views

Nessus Security Vulnability Fix: SSL Version 2 (v2) Protocol Detection

Below, in quotes, is a medium severity issue discovered after scanning an IIS web server, with a tool called Nessus. "Consult the application's documentation to disable SSL 2.0 and use SSL 3.0, TLS ...
3
votes
3answers
58 views

Why is Android / IE using 3DES when AES is available?

I have a Zimbra installation and want to harden the cipher suites. I disabled some and am quite OK with what is left. The problem now is that the Qualys SSL test shows a lot of clients will use 3DES, ...
-1
votes
1answer
41 views

How to create certificates for local network

I have a local network (a intranet of about 50 to 70 computers) where is a Windows Server 2008 with a ASP.NET MVC application. To encrypt the connection with HTTPS i need a server certificate (not ...