[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [FW-1] Vedr.: [FW-1] Something about Sendmail & FW-1
Do u have a reverse DNS record for your mail server in your extern DNS ? U need to have that ! (Had the same problem with hotmail.com and others).... ____________________________________________________ Med venlig hilsen / Best regards Lars Schmidt-Petersen Tlf. : +45 74 33 53 42 Sønderjyllands Amt - edb-kontoret e-mail : [email protected] Skelbækvej 2 6200 Aabenraa ____________________________________________________ Nick Brandson <[email protected]> Sendt af: Mailing list for discussion of Firewall-1 <[email protected]> 25-08-2003 13:48 Besvar venligst til Mailing list for discussion of Firewall-1 Til: [email protected] cc: Vedr.: [FW-1] Something about Sendmail & FW-1 Dear guru, Got some problems with Sendmail setting (I bet). Having place the Sendmail in DMZ and all the mails CAN be sent and received successfully and normally EXCEPT those mails sending to the mail servers or systems need to do a reversed DNS Lookup, then the user will receive a bounced back message from the mail server saying "550.5.71 <receipent's email> ... Relaying denied. IP name lookup failed [Firewall DMZ Internal IP]". Tried to ask the user to add the Reversed DNS record for the mail server nslookup x.x.x.x can receive the reply from mail.x.com - successful Firewall settings 1. Mail Servers in the DMZ 2. One-to-one (Static) NAT for mail servers 3. Enabled "Auto Arp" & "Client-side NAT" 4. Rule allow "Any -> MailSrvs -> SMTP/POP -> Allow" 5. Hide behind this interface 0.0.0.0 for Internal Segement 6. No Hide mode for DMZ network 7. DNS query is allowed in the Global Property Internal: 192.168.1.0.x/24 DMZ : 192.168.10.x/24 Firewall-Internal: 192.168.1.254 Firewall-DMZ: 192.168.10.254 Is there any setting has to be done in sendmail server? Seems the relay setting is blocked in the sendmail as it showed the firewall dmz IP address in the error message... thanks Nick __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com ================================================= To set vacation, Out-Of-Office, or away messages, send an email to [email protected] in the BODY of the email add: set fw-1-mailinglist nomail ================================================= To unsubscribe from this mailing list, please see the instructions at http://www.checkpoint.com/services/mailing.html ================================================= If you have any questions on how to change your subscription options, email [email protected] ================================================= ================================================= To set vacation, Out-Of-Office, or away messages, send an email to [email protected] in the BODY of the email add: set fw-1-mailinglist nomail ================================================= To unsubscribe from this mailing list, please see the instructions at http://www.checkpoint.com/services/mailing.html ================================================= If you have any questions on how to change your subscription options, email [email protected] =================================================
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