I configured for my company , a 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. I installed Centos5.2 with ISPConfig and I noticed that for two different zones like hypertec.ca and ciara-us.com that have records in the same subnet like 208.92.134.0 , the reverse zone automatically generated by ISPConfig is setting all the PTR records with the same domain name If I put in the DNS Manager the SOA entry for two domains with two different IPs The Reverse zone file like "pri.134.92.208.in-addr.arpa" still 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 Real problem is with the MX records that need a PTR record with same name as in the MX records and ISPConfig seems to not 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 NS ns2.hypertec.ca. ; Inet Address of name 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 NS ns2.hypertec.ca. ; Inet Address of name hypertec.ca. A 208.92.134.18 ns2 A 208.92.134.19 ns1 A 208.92.134.18 [root@ns1 named]# more pri.example.com $TTL 3600 @ IN SOA ns1.hypertec.ca. postmaster.hypertec.ca. ( 2008071802 ; 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 NS ns2.hypertec.ca. ; Inet Address of n MX 10 mail.clients-ciara.com. example.com. A 208.92.134.18 hypertec-it A 208.92.134.10 [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 there. thanks
