AOL has hard time resolving to us.
Len Conrad
LConrad at Go2France.com
Fri Nov 9 17:16:50 UTC 2001
>ehlo sandia.gov
>250-rly-xa04.mx.aol.com peer name unknown
>250 HELP
>Mail From: <macinen at sandia.gov <mailto:macinen at sandia.gov> >
>421 SERVICE NOT AVAILABLE, TEMPORARY DNS FAILURE
look at these DNS delays:
mgw1# dig sandia.gov
; <<>> DiG 8.3 <<>> sandia.gov
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 6, ADDITIONAL: 6
;; QUERY SECTION:
;; sandia.gov, type = A, class = IN
;; ANSWER SECTION:
sandia.gov. 1H IN A 132.175.109.1
;; AUTHORITY SECTION:
sandia.gov. 1H IN NS ns1.sandia.gov.
sandia.gov. 1H IN NS ns2.sandia.gov.
sandia.gov. 1H IN NS ns3.sandia.gov.
sandia.gov. 1H IN NS ns4.sandia.gov.
sandia.gov. 1H IN NS ns5.sandia.gov.
sandia.gov. 1H IN NS ns0.sandia.gov.
;; ADDITIONAL SECTION:
ns1.sandia.gov. 1H IN A 132.175.1.3
ns2.sandia.gov. 1H IN A 132.175.249.6
ns3.sandia.gov. 1H IN A 134.253.181.25
ns4.sandia.gov. 1H IN A 134.253.16.5
ns5.sandia.gov. 1H IN A 134.253.181.115
ns0.sandia.gov. 1H IN A 132.175.249.1
;; Total query time: 4177 msec
;; FROM: mgw1.meiway.com to SERVER: default -- 212.73.210.69
;; WHEN: Fri Nov 9 18:14:42 2001
;; MSG SIZE sent: 28 rcvd: 248
mgw1# dig sandia.gov mx
; <<>> DiG 8.3 <<>> sandia.gov mx
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 3, ADDITIONAL: 5
;; QUERY SECTION:
;; sandia.gov, type = MX, class = IN
;; ANSWER SECTION:
sandia.gov. 1H IN MX 10 mm02snlnto.sandia.gov.
sandia.gov. 1H IN MX 10 mm01snlnto.sandia.gov.
;; AUTHORITY SECTION:
sandia.gov. 1H IN NS ns0.sandia.gov.
sandia.gov. 1H IN NS ns1.sandia.gov.
sandia.gov. 1H IN NS ns2.sandia.gov.
;; ADDITIONAL SECTION:
mm01snlnto.sandia.gov. 1H IN A 132.175.109.20
mm02snlnto.sandia.gov. 1H IN A 132.175.109.21
ns0.sandia.gov. 1H IN A 132.175.249.1
ns1.sandia.gov. 1H IN A 132.175.1.3
ns2.sandia.gov. 1H IN A 132.175.249.6
;; Total query time: 3492 msec
;; FROM: mgw1.meiway.com to SERVER: default -- 212.73.210.69
;; WHEN: Fri Nov 9 18:14:55 2001
;; MSG SIZE sent: 28 rcvd: 216
... and with 3600 TTL, you're forcing DNS's to hammer through these long
delays and perhaps timeout. goto 86400.
Len
http://MenAndMice.com/DNS-training
http://BIND8NT.MEIway.com : ISC BIND 8.2.4 for NT4 & W2K
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