On Sun, 16 Nov 2003 13:39:40 -0600, Cowles, Steve wrote > Mike Vanecek wrote: > > Two questions. > > > > 1. Why do I not run into the same reverse lookup problem? Is it > > because I have a static ip? > > Probably. FWIW: I have a static IP address through Verizon and never > had a problem deliving e-mail even though reverse lookup queries did > not match the name lookup. After three years, I finally found the > right department at Verizon and got my PTR record changed. I am using Cox-Internet. Not always the most helpful. > > > > 2. If I understand things correctly ... The only way host ip-address > > will return my domain-name is for my isp to put a PTR record in their > > zone definitions (which most are reluctant to do)? Any other way to > > get a reverse lookup to point to my domain name as opposed to the isp > > name? > > Not that I'm aware of. Your ISP has to either: > > 1) Delegate the PTR record lookup at your DNS server. > > 2) Change the PTR record to what you specify in their zone files. > This is what Verizon did for me. They would not delegate (add a NS > record) to my DNS server. BTW: Based on my conversations with > Verizon, they only make these PTR record changes for Business > (static) accounts, not residential (DHCP assigned) accounts. Yea, mine with Cox-Internet is a commercial account, so ... For what they charge me for a static ip address you would think they would bring me hot tea in the morning. I maintain my zone records at UltraDNS. I have asked Cox-Internet if they want to maintain them. However, I have complete control over them at UltraDNS and will probably not move them. I have another server configured on a Velocity virtual domain server. No problems there since they maintain their own block of ip addresses and can insert a PTR record in the zone (as well as maintain my zone records). However, they control the OS and I need to be able to have one that can be changed at will. > If you want to understand why your ISP must make the PTR record change... > > Type: dig +trace -x yy.yy.yy.yy > > where yy.yy.yy.yy is your static IP address. The above dig command will > follow the query back from the root name servers. The final "answer" > should come from your ISP's name servers. The more I use dig, the more I appreciate it power. I tried calling tech support, but could not get by level 1 who was of little help. I have sent an email to support. We will see where that goes. Thank you for the information. -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
