OpenSSL: socket: Connection refused connect:errno=111

digital-certificateopensslsslssl-certificatex509certificate

I am trying to connect to one Linux server from a client,

openssl s_client -connect <IP of Server>:443

I am getting the following error:

socket: Connection refused
connect:errno=111

Best Solution

Check the ports of the server by any tool. For Example,

 nmap <IP>

Starting Nmap 5.21 ( http://nmap.org ) at 2015-05-05 09:33 IST
Nmap scan report for <IP>
Host is up (0.00036s latency).
Not shown: 996 closed ports
PORT    STATE SERVICE
22/tcp  open  ssh
111/tcp open  *****
139/tcp open  *****
443/tcp open  openssl
MAC Address: 18:03:73:DF:DC:62 (Unknown)

Check the port number is in openstate.

Related Solutions

Using OpenSSL what does “unable to write ‘random state'” mean

In practice, the most common reason for this happening seems to be that the .rnd file in your home directory is owned by root rather than your account. The quick fix:

sudo rm ~/.rnd

For more information, here's the entry from the OpenSSL FAQ:

Sometimes the openssl command line utility does not abort with a "PRNG not seeded" error message, but complains that it is "unable to write 'random state'". This message refers to the default seeding file (see previous answer). A possible reason is that no default filename is known because neither RANDFILE nor HOME is set. (Versions up to 0.9.6 used file ".rnd" in the current directory in this case, but this has changed with 0.9.6a.)

So I would check RANDFILE, HOME, and permissions to write to those places in the filesystem.

If everything seems to be in order, you could try running with strace and see what exactly is going on.

Git – SSL certificate rejected trying to access GitHub over HTTPS behind firewall

The problem is that you do not have any of Certification Authority certificates installed on your system. And these certs cannot be installed with cygwin's setup.exe.

Update: Install Net/ca-certificates package in cygwin (thanks dirkjot)

There are two solutions:

Actually install root certificates. Curl guys extracted for you certificates from Mozilla.

cacert.pem file is what you are looking for. This file contains > 250 CA certs (don't know how to trust this number of ppl). You need to download this file, split it to individual certificates put them to /usr/ssl/certs (your CApath) and index them.

Here is how to do it. With cygwin setup.exe install curl and openssl packages execute:
```
$ cd /usr/ssl/certs
$ curl http://curl.haxx.se/ca/cacert.pem |
  awk '{print > "cert" (1+n) ".pem"} /-----END CERTIFICATE-----/ {n++}'
$ c_rehash
```
Important: In order to use c_rehash you have to install openssl-perl too.
Ignore SSL certificate verification.

WARNING: Disabling SSL certificate verification has security implications. Without verification of the authenticity of SSL/HTTPS connections, a malicious attacker can impersonate a trusted endpoint (such as GitHub or some other remote Git host), and you'll be vulnerable to a Man-in-the-Middle Attack. Be sure you fully understand the security issues and your threat model before using this as a solution.
```
$ env GIT_SSL_NO_VERIFY=true git clone https://github...
```

Best Solution

Related Solutions

Using OpenSSL what does “unable to write ‘random state'” mean

Git – SSL certificate rejected trying to access GitHub over HTTPS behind firewall

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