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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [FW-1] Spam blacklist...How to stop open relays at the firewa ll(FW-1 ) HELP!!!!!!!!!
I'm wondering if our mail servers are being exploited in the same way. Is there any way to tell if our Exchange 5.5 server is being used by spammers? Thanks, John FW-1 4.1 NT -----Original Message----- From: Tim Anderson [mailto:[email protected]] Sent: Wednesday, October 24, 2001 7:24 AM To: [email protected] Subject: Re: [FW-1] Spam blacklist...How to stop open relays at the firewa ll(FW-1 ) HELP!!!!!!!!! What type of mail relay are you using? If it is Exchange you can refuse relaying very easily except for appropriate inbound mail. I am sure Sendmail has similar features. Tim Anderson -----Original Message----- From: Reed Mohn, Anders [mailto:[email protected]] Sent: Wednesday, October 24, 2001 3:48 AM To: [email protected] Subject: Re: [FW-1] Spam blacklist...How to stop open relays at the firewa ll(FW-1 ) HELP!!!!!!!!! Sorry for pointing out the obvious here, but: The best way is, of course, to fix the mailserver. One day, someone will find a loophole through the firewall, and you will be up that creek again. Cheers, Anders :) -----Original Message----- From: Timothy K. Cornelius [mailto:[email protected]] Sent: 23. oktober 2001 23:27 To: [email protected] Subject: Re: [FW-1] Spam blacklist...How to stop open relays at the firewall(FW-1 ) HELP!!!!!!!!! At this time our internet mailserver(behind the FW-1) has been designated as an open relay mailserver and has been blacklisted by several spam blocker websites( www.orbz.org <http://www.orbz.org> is one of them) after reading up on how to stop this at the firewall I added two rules on the firewall with services w/resources. the resource(SMTP->our-mail-only-in) is SMTP and the match is coming in the sender is * and the recipient is *loi.org. The other is going out, the resource(SMTP->our-mail-only-out) is SMTP and the match is sender is *loi.org and the recipient is * I have also created a rule below these two that denies and mail service plus 2 services with resources (SMTP->openrelay-in and SMTP->openrelay-out) these are the same as the first two. Is this not the correct way to handle stopping an open relay mailserver or is there a better way? PLEASE HELP ME ASAP!!!!!!!!!!!!!!! our mail services are just about non-existent, except my Firewall email groups. 1 Source: any Dest.: mailserver Service: SMTP->our-mail-only-in Action: accept 2 Source:mailserver Dest: any Service:SMTP->our-mail-only-out Action: accept Thanks in advance, Tim --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.286 / Virus Database: 152 - Release Date: 10/9/2001 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.286 / Virus Database: 152 - Release Date: 10/9/2001 =============================================== To unsubscribe from this mailing list, please see the instructions at http://www.checkpoint.com/services/mailing.html =============================================== =============================================== To unsubscribe from this mailing list, please see the instructions at http://www.checkpoint.com/services/mailing.html =============================================== =============================================== To unsubscribe from this mailing list, please see the instructions at http://www.checkpoint.com/services/mailing.html ===============================================
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