Security Basics mailing list archives
RE: email gateway (transparent) - full transparent
From: "Shawn Jackson" <sjackson () horizonusa com>
Date: Fri, 14 Nov 2003 12:57:03 -0800
If you're using Linux routers at your remote sites you can 'intercept' the STMP request and mangle the header to point to your MX servers. Of course that would require use of IPTABLES/IPCHAINS in addition to your routing software, I.e. SQUID. Shawn Jackson Systems Administrator Horizon USA 1190 Trademark Dr #107 Reno NV 89521 www.horizonusa.com Email: sjackson () horizonusa com Phone: (775) 858-2338 (800) 325-1199 x338 -----Original Message----- From: arek () chelmnet pl [mailto:arek () chelmnet pl] Sent: Thursday, November 13, 2003 11:33 AM To: security-basics () securityfocus com Subject: RE: email gateway (transparent) - full transparent I'm using posftix+amavis+ polish (mks-vir) for virus scanning pop-before smtp + ordb + few others db + local regexp database for stop relaying and anti spam. The result in relaying is 100% accurate, but spam is comming from time to time ( eg. V1@GRA). But where my problem is: My problem is with my local users (about 3k LAN users in about 500 buildings), they send spam (viruses, worms etc) not using my MTA. I'm looking for transparent method (like redirect for transparent-proxy w3cache, squid) to force traffic on port 25 to go via my MTA. Do you have any ideas or experiences with that ? I thought about writing own code for that, but im far far away from that (begging with C proggramming and kernel hacking), instead i'm good in mixing every working capabilities wich are accessible and done before by somebody else ;) BTW. Well, if somebody is wondering how such LAN can work with linux routers + sql_db + local_scripting + php + bash = CRM and NETWORK_ADMINISTRATION, BILLING_SOFTWARE, AUTOMATIC_EMAIL_OFFICE visit my own software (sorry - but is not in english and has 1mega pictures) http://nsm.pl/~arek/superedit . I'm interested in sharing my soft for development purposes or any other. Arkadiusz Binder ------------------------------------------------------------------------ --- Forum Systems PRESIDIO: PGP / XML GATEWAY APPLIANCE The Presidio integrates PGP data encryption and XML Web Services security to simplify the management and deployment of PGP and reduce overall PGP costs by up to 80%. FREE WHITEPAPER & 30 Day Trial - http://www.securityfocus.com/sponsor/ForumSystems_security-basics_031027 ------------------------------------------------------------------------ ---- --------------------------------------------------------------------------- Forum Systems PRESIDIO: PGP / XML GATEWAY APPLIANCE The Presidio integrates PGP data encryption and XML Web Services security to simplify the management and deployment of PGP and reduce overall PGP costs by up to 80%. FREE WHITEPAPER & 30 Day Trial - http://www.securityfocus.com/sponsor/ForumSystems_security-basics_031027 ----------------------------------------------------------------------------
Current thread:
- RE: email gateway (transparent) - full transparent Shawn Jackson (Nov 16)