[OpenSER-Users] Enum lookup delays

[Klaus Darilion]

Klaus Darilion schrieb:
> Hi Nick!
> 
> This is a known problem with ENUM - lame delegations will increase DNS 
> lookup duration and you can't avoid it (it also happened to e164.arpa 
> last year when Italy's name server were offline).

Hi! It is again Italy:

dig 1.2.3.9.3.e164.arpa naptr +trace

; <<>> DiG 9.2.4 <<>> 1.2.3.9.3.e164.arpa naptr +trace
;; global options:  printcmd
.                       518400  IN      NS      K.ROOT-SERVERS.NET.
.                       518400  IN      NS      L.ROOT-SERVERS.NET.
.                       518400  IN      NS      M.ROOT-SERVERS.NET.
.                       518400  IN      NS      A.ROOT-SERVERS.NET.
.                       518400  IN      NS      B.ROOT-SERVERS.NET.
.                       518400  IN      NS      C.ROOT-SERVERS.NET.
.                       518400  IN      NS      D.ROOT-SERVERS.NET.
.                       518400  IN      NS      E.ROOT-SERVERS.NET.
.                       518400  IN      NS      F.ROOT-SERVERS.NET.
.                       518400  IN      NS      G.ROOT-SERVERS.NET.
.                       518400  IN      NS      H.ROOT-SERVERS.NET.
.                       518400  IN      NS      I.ROOT-SERVERS.NET.
.                       518400  IN      NS      J.ROOT-SERVERS.NET.
;; Received 244 bytes from 83.136.32.190#53(83.136.32.190) in 23 ms

e164.arpa.              172800  IN      NS      ns0.verio.net.
e164.arpa.              172800  IN      NS      sec3.apnic.net.
e164.arpa.              172800  IN      NS      sunic.sunet.se.
e164.arpa.              172800  IN      NS      ns-pri.ripe.net.
e164.arpa.              172800  IN      NS      tinnie.arin.net.
e164.arpa.              172800  IN      NS      e164-arpa.cnnic.net.cn.
;; Received 205 bytes from 193.0.14.129#53(K.ROOT-SERVERS.NET) in 30 ms

9.3.e164.arpa.          14400   IN      NS      dns2.istsupcti.it.
9.3.e164.arpa.          14400   IN      NS      dns.istsupcti.it.
;; Received 86 bytes from 192.102.248.135#53(ns0.verio.net) in 159 ms

;; connection timed out; no servers could be reached


As a workaround you can configure the Italien zone 9.3.e164.arpa in your 
resolver.

regards
Klaus




> 
> You should adjust DNS timeouts (see core cookbook on openser wiki) and 
> make sure to reply with 100 trying before the ENUM lookup.
> 
> regards
> klaus
> 
> Nick Warr schrieb:
>> I'm having some real problems with enum lookup delays (20 or 30 seconds 
>> before they come back) I'm using e164.arpa then nrenum.net, these seem 
>> to have worked fine until yesterday evening it seems...
>>
>> Does anyone have any info on whether either of these services is having 
>> problems???
>>
>> _______________________________________________
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>> Users at lists.openser.org
>> http://lists.openser.org/cgi-bin/mailman/listinfo/users
> 
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