**Requirement**: SSH connection from Client to Server should work.(Client has only port 80 and 443 open, Server has port 80, 443 and 22 open)

**Server**: Ubuntu
**Client**: Ubuntu or Windows

**Solution 1: Let SSH Server listen on a new port 443**

This Solution works for both type of Client, i.e, it works for Ubuntu and Windows.

__On Server:__

$ sudo nano /etc/ssh/sshd_config

Change 
Port 22
to
Port 443

__On Client:__

ssh -p 443 username_on_Server@IP_of_Server 

sftp -P 443 username_on_Server@IP_of_Server

**Solution 2**: Use httptunnel

1. This solution works only for ubuntu client. It doesn't work on windows client.

2. Download "HTTPTunnel_v1.2.1_platformindependent.tgz" from http://sourceforge.net/projects/http-tunnel/files/http-tunnel/HTTPTunnel%20v1.2.1/ to Client and Server.

3. Install HTTPTunnel on Client and Server.
$tar -xvzf HTTPTunnel_v1.2.1_platformindependent.tgz
$cd HTTPTunnel_v1.2.1
$cp -R common perl
$cd perl

4. Start HTTPTunnel on Client
$perl httptunnel_client.pl

5. Start HTTPTunnel on Server
$perl httptunnel_server.pl

6. On Client, open browser to URL http://localhost:1079

7. Config Client  http://localhost:1079
  On Tab "Tunnel Client", modify the "Portmapping Proxy" with following parameter:
   Map port: 10022
   to port: 22
   on server: IP_of_Server
  Make sure that port 10022 is unused: command "$sudo lsof -i :10022" must list nothing
  Otherwise set another value to "Map port" greater than 1024

8. On Server, open browser to URL http://localhost
    Make sure, that port 80 is unused. Otherwise stop the process which use port 80.
    "$sudo lsof -i :80" 
    "$sudo kill pid_number"

9. On Client, use following command to connect Server:
    $ssh -p 10022 username_in_Server@localhost

10. On Client, also FileZilla works with following Setting:
     Host: localhost
     Port: 10022
     Protocol: SFTP-SSH File Transfer Protocol
     Logon Type: Ask for password
     user: username in Server

If you want the connection be encrypted, please install Crypt::OpenSSL::RSA and Mcrypt for perl on Ubuntu:

11. upgrade and update
$sudo apt-get upgrade
$sudo apt-get update

12. Install perl modus Crypt::OpenSSL::RSA

$sudo apt-get install libssl-dev
$sudo perl -MCPAN -e 'install Crypt::OpenSSL::RSA'

13. Prepare for installing perl modus Mcrypt

$sudo apt-get install synaptic
$sudo synaptic

install following packages from synaptic:

libyaml-libyaml-perl
libyaml-perl
libmcrypt-dev

14. Create syslink for libltdl.so
sudo ln -s /usr/lib/x86_64-linux-gnu/libltdl.so.7 /usr/lib/x86_64-linux-gnu/libltdl.so

15. Install Mcrypt
$sudo perl -MCPAN -e 'install Mcrypt'

16. Start server again, Warning about Encryption is not shown anymore.
$perl httptunnel_server.pl