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Overview
eWall LSP (Layered Service Provider) is unique FREE eWall add-on, an intermediary
layer for standart Winsock2 calls. It's designed to make eWall truly
transparent by providing originating sender IP address to mail server,
thereby making all IP-based mail server features working.
How it works
The picture below demonstrates how eWall works without EWLSP. The mail client connects from IP 64.233.187.99, and eWall
connects to mail server from localhost (127.0.0.1). Thereby, mail server will always see the connection originating from 127.0.0.1.
It makes inoperative some mail server security/anti-spam features, based on sender IP address (for example, DNS Black Lists, SPF, black/white IP lists, POP3 before SMTP, etc.).
After installation EWLSP hooks into Winsock2 chains and monitor the eWall connections.
When mail client raise new connection, EWLSP is passing originating IP address over eWall directly to mail server (as shown on another picture below).
EWLSP works only in context of eWall and mail server processes and self-disabling for other applications.
EWLSP makes eWall unique application, an invisible guard for your favorite mail server, and eWall become transparent.
Limitations
Both eWall and mail server must be installed on same PC, otherwise no magic. Also, if there any other LSP installed, and EWLSP interfere
with them, it's recommended uninstall EWLSP. The EWLSP functionality heavily depends on mail server model
and Winsock2 calls (blocking, IOCP, extensions etc.), and due to LSP plugin complication it's very
hard to satisfy to every model, thereby EWLSP is oriented on common ones and may not work with some
mail servers, for example MS Exchange. If after installation EWLSP doesn't work or you experience some anomalies,
uninstall EWLSP.
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Christian Bartsch
Chief Editor/CEO
Digital-Movie.de |
| We're a company providing content in the entertainment business. Early this
year we decided to set up our own mail server, as problems and spam via the
provider's mail server were increasing. We are currently using a combination
of ArGoMail and eWall in combination with Paranoid. After only two weeks of
training, eWall with Paranoid was ready for stopping spam directly on the
server. Now our employees can focus on what they are supposed to do: write
good articles. In the meantime, eWall focuses on filtering our mails. Over
95% of spam gets caught, with no false positives at all. eWall with Paranoid
is an unbeatable bundle at an unbeatable price. Thanks Server Side
Solutions! Our mailboxes now are mailboxes again and not huge dustbins for
the spammers of the world. |
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