HoSProxy - Http over SMTP Proxy


HoSProxy is a tool designed to let you access the web in a LAN without internet connection but with access to an E-mail system only.

HoS means Http over SMTP, that is to say, using the E-mail system as http-proxy to navigate the web.


How does it work?

HoSProxy is made up of two parts:
  • HosTunnel: You need an external server (outside LAN) which must be running HoSTunnel (with root privileges to listen on port 25) and which receives and sends emails with encoded and packaged http requests/responses.

  • HoSProxy: An internal proxy connected to the web browser, that sends HTTP request trough emails via the company SMTP server, and polls for responses in the company POP/IMAP server.

The configuration file is hosproxy.cfg.

Once HoSProxy is configured, it listens in 8008 port and you only have to connect your web browser to that port and enjoy the web ;).

The mechanism of HosProxy is shown in the following picture:

Examples
You only need to configure HoSProxy, not HosTunnel.
HoSProxy contains the following config file (hosproxy.cfg) 

[CFG] 

# Your smtp server for outgoing mails, for example:
#smtp.myserver.com 
local_smtp_server=
# Y or N
smtp-auth=N
smtp-user=cdelojo@edge-security.com
smtp-pass=


# Specify your Mail access server protocol (pop, imap,
#imapssl, popssl)
mail_retrieve_protocol=pop
# Your mail access server server for incoming mails, for
#example: pop3.myserver.com
mail_access_server=

#Your username to connect to your mail access server
mas_user=cdelojo@edge-security.com
#YOUR PASSWORD WILL BE PROMPTED IF YOU WANT but you can
#configure it
mas_passwd=

#Your email, account used for recive http responses ;)
email=cdelojo@edge-security.com

#This is the e-mail address to send the HTTP-requests, the
#user name can be random eg. asdf@external-server.com
ext_email=asdf@ligual.net

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