Until now I thought one IP address should have exactly one reverse dns entry... I've noticed that ISPconfig creates multiple PTR records in the pri.xxx.xxx.xxx.in-addr.arpa zone, one for each virtualhost and it's aliases. I like to use my ISPConfig-server as master dns server as well. Well, multiple ptr entries are legal but AFAIK not recommended to avoid running into trouble with spam bounce issues. Are there any experiences with this, in particular with ISPConfig?
That's right. We have this on our to-do list (i.e., we want to change this so that ISPConfig creates just one PTR per IP). Normally the PTR records are reated by the ISP who gave you the IP address.
Where to change source? Thanks for your reply! Hm, so it's more or less useless to have PTR's created at all. As I intend to have my virtual addresses on the ISPConfig machine and this machine the same time as their authoritative ns1 - it would be useful to have a hint which file to ask for to comment out the corresponding source line(s) - just to prevent creation of multiple PTR's. And: thanks a lot for your work!
You don't need to comment out the PTR records - they don't hurt. If the PTR records are requested by someone, your ISP's server will be asked, not yours.
it depends if the ISP give you the delegation of your IP addresses or not. generally they don't give it, until it's your own IP addresses block. I think it would be great to have a specific PTR page to manage IPs and their PTR manually, and not automatically based on A records.
BGP company: Reverse PTR records created with the same domain name I configured as network admin , BGP protocol since we have our own block of IP addresses from ARIN, so now I have to register the PTR records for all my clients into my own DNS servers, not at the carriers side I installed Centos5.2 wot ISPConfig and I noticed that for two different zones like hypertec.ca and ciara-us.com that have records in the same subnet or segment like 208.92.134.0 , the reverse zone automaticaly generated by ISPConfig is setting all the PTR records with the same domain name { DNS_SOA} even if I put the SOA entry for two domains with two different IPs The Reverse zone file like "pri.134.92.208.in-addr.arpa" has the PTRs with the right hostnames but with the same domain name. In the following samples I have pc1.ciara-us.com with 208.92.134.15 and at a nslookup 208.92.134.15 the result is pc1.hypertec.ca which is wrong: [root@ns1 named]# nslookup pc1.ciara-us.com Server: 208.92.134.18 Address: 208.92.134.18#53 Name: pc1.ciara-us.com Address: 208.92.134.15 [root@ns1 named]# nslookup 208.92.134.15 Server: 208.92.134.18 Address: 208.92.134.18#53 15.134.92.208.in-addr.arpa name = pc1.hypertec.ca. The problem is with the MX records that need a PTR record with same name ( host.domain) and ISP config cannot generate the correct PTR records Here is a config sample: [root@ns1 named]# more pri.ciara-us.com $TTL 3600 @ IN SOA ns1.hypertec.ca. postmaster.hypertec.ca. ( 2008072205 ; serial, todays date + todays serial # 10 ; refresh, seconds 600 ; retry, seconds 86400 ; expire, seconds 3600 ) ; minimum, seconds ; NS ns1.hypertec.ca. ; Inet Address of name ser ver 1 NS ns2.hypertec.ca. ; Inet Address of name ser ver 2 ; MX 10 mail.clients-ciara.com. ciara-us.com. A 208.92.134.18 pc1 A 208.92.134.15 www A 209.104.84.250 ;;;; MAKE MANUAL ENTRIES BELOW THIS LINE! ;;;; [root@ns1 named]# more pri.hypertec.ca $TTL 3600 @ IN SOA ns1.hypertec.ca. postmaster.hypertec.ca. ( 2008071804 ; serial, todays date + todays serial # 900 ; refresh, seconds 600 ; retry, seconds 86400 ; expire, seconds 3600 ) ; minimum, seconds ; NS ns1.hypertec.ca. ; Inet Address of name ser ver 1 NS ns2.hypertec.ca. ; Inet Address of name ser ver 2 ; hypertec.ca. A 208.92.134.18 ns2 A 208.92.134.19 ns1 A 208.92.134.18 [root@ns1 named]# more pri.134.92.208.in-addr.arpa $TTL 86400 @ IN SOA ns1.hypertec.ca. hostmaster.hypertec.ca. ( 2008072201 ; serial, todays date + todays serial # 28800 ; Refresh 7200 ; Retry 604800 ; Expire 86400) ; Minimum TTL NS ns1.hypertec.ca. NS ns2.hypertec.ca. 18 PTR hypertec.ca. 19 PTR ns2.hypertec.ca. 15 PTR pc1.hypertec.ca. 10 PTR hypertec-it.hypertec.ca. ;;;; MAKE MANUAL ENTRIES BELOW THIS LINE! ;;;; Please help, if there is a posibility I was looking into the file reverse_zone.in-addr.arpa.master file to figure it out but there is only one Variable . thanks
