rpz_rewrite(): failure

[Wilfred Sarmiento]

Hi Darren,

Sorry for late response, see below scrubbed config;

We updated the bind to 9.18.14 but still experienced the same issue.


controls {

inet 127.0.0.1 port 953 allow {

127.0.0.1/32;

} keys {

"rndc-key";

};

};

logging {

channel "default_syslog" {

file "/var/local/syslog" versions unlimited size 2147483648;

severity warning;

print-time yes;

print-severity yes;

print-category yes;

};

category "resolver" {

"default_syslog";

};

category "queries" {

"default_syslog";

};

category "lame-servers" {

"null";

};

};

options {

directory "/var/local/bind";

recursive-clients 10000;

statistics-file "/var/local/bind/etc/named.stats";

version "Query Not Allowed.";

allow-recursion {

"globeIP";

};

response-policy {

zone "rpzblacklisted";

};

synth-from-dnssec no;

allow-query {

"globeIP";

};

zone-statistics yes;

};

key "rndc-key" {

algorithm "hmac-md5";

secret
"????????????????????????????????????????????????????????????????????????????????????????";

};

server fe80::/10 {

bogus yes;

};

zone "." in {

type hint;

file "namedb/db.cache";

};

zone "localhost" IN {

type master;

file "namedb/db.localhost";

};

zone "0.0.127.in-addr.arpa" in {

type master;

file "namedb/db.127.0.0";

notify no;

};

zone "rpzblacklisted" {

type slave;

file "/var/local/bind/db.rpzblacklisted";

masters {

x.x.x.x;

};

};

Thank you,
Wil

On Wed, May 10, 2023 at 6:31 PM Darren Ankney <darren.ankney at gmail.com>
wrote:

> Hi Wilfred,
>
> You might want to consider updating your BIND server.  The latest
> 9.18.x is 9.18.14.  There have been many fixes between 9.18.2 and
> 9.18.14 as can be seen here:
> https://bind9.readthedocs.io/en/v9.18.14/notes.html  Also, when
> testing, you may want to consider using dig as it provides far more
> detail.  nslookup usage is no longer recommended as it has been
> deprecated.
>
> As to this specific issue, I'm not sure.  You might get more help from
> others, however, if you share your configuration.  You can get a
> configuration scrubbed of keys using `named-checkconf -px`
>
> Thank you,
>
> Darren Ankney
>
> On Tue, May 9, 2023 at 9:39 AM Wilfred Sarmiento via bind-users
> <bind-users at lists.isc.org> wrote:
> >
> > Hi Bind Users,
> >
> > Any one familiar with the error we encountered on DNS BIND 9.18.2 Ubuntu
> for DNS Caching, below;
> >
> > We are using RPZ for redirecting domains (porn sites) where we already
> have 20k+ entries.
> > The domain (globem2m.com.ph) from below logs is not in the RPZ list but
> was processed for RPZ QNAME rewrite, based on the logs, and query to that
> domain results to SERVFAIL.
> > The issue is isolated to several domains only including globem2m.com.ph,
> all other queries to different domains are successful.
> >
> > To resolve this issue, we have to flush cache or restart the BIND
> service.
> >
> > root at bind# nslookup globem2m.com.ph <server ip>
> >
> >
> > ** server can't find globem2m.com.ph: SERVFAIL
> >
> >
> > Trace logs:
> >
> > : query (cache) 'globem2m.com.ph/A/IN' approved
> >
> > : rpz QNAME rewrite globem2m.com.ph stop on qresult in rpz_rewrite():
> failure
> >
> > : query failed (failure) for globem2m.com.ph/IN/A at query.c:7657
> >
> > fetch completed at resolver.c:4053 for globem2m.com.ph/A in 0.000000:
> failure/success [domain:com.ph
> ,referral:0,restart:1,qrysent:0,timeout:0,lame:0,quota:0,neterr:0,badresp:0,adberr:2,findfail:0,valfail:0]
> >
> > : reset client
> >
> > : servfail cache hit globem2m.com.ph/A (CD=0)
> >
> > : query failed (SERVFAIL) for globem2m.com.ph/IN/A at query.c:6949
> >
> > : reset client
> >
> >
> > Thank you,
> > Wil
> >
> >
> >
> >
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