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6.6

dnsreport.com errors, servers behind NAT/PAT

Asked by klukac in Linux Networking

Tags: behind, nat, programs

Mail from my domain, which is hosted on a server behind a pix firewall, is still being delivered to junk mail, so I checked dnsreport.com and found the following errors:
1.  The parent servers (I checked with f.gtld.biz.) are not providing glue for all your nameservers. [This means that they are supplying the NS records (host.example.com), but not supplying the A records (192.0.2.53), which can cause slightly slower connections, and may cause incompatibilities with some non-RFC-compliant programs.]  Does this mean that I need to ask my ISP to include A records for the servers in my zone?  (They are aware of my servers' external IPs, so I take this to mean that I need to tell them what to do with that information).
2.  One or more of your mailservers is claiming to be a host other than what it really is.  I don't know how a nat'd server can avoid this!  The host name on the server is not the same name I use externally, because the PIX 501 requires separate hostnames for separate IPs.  If there's something that can be done about this, let me know.
3.  Your domain does not have an SPF record.   I went to http://www.openspf.org/ and changed my zone file based on the steps outlined at the site about 1.5 days ago.  Is this an indication that I made some mistake, that it doesn't work in a NAT environment, or that it takes longer to propagate?
Thanks in advance :)
[+][-]07/31/06 05:30 PM, ID: 17220284Accepted Solution

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Zone: Linux Networking
Tags: behind, nat, programs
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Solution Provided By: Netminder
Participating Experts: 2
Solution Grade: B
 
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