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[solved]dig: ";; Got bad packet: bad compression pointer"
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toralf
Developer
Developer


Joined: 01 Feb 2004
Posts: 3943
Location: Hamburg

PostPosted: Sat Jun 03, 2017 9:23 am    Post subject: [solved]dig: ";; Got bad packet: bad compression pointe Reply with quote

I got today at my server
Code:
mr-fox ~ # dig -x 139.199.79.28
;; Got bad packet: bad compression pointer
109 bytes
97 a8 83 83 00 01 00 00 00 01 00 01 02 32 38 02          .............28.
37 39 03 31 39 39 03 31 33 39 07 69 6e 2d 61 64          79.199.139.in-ad
64 72 04 61 72 70 61 00 00 0c 00 01 c0 16 00 06          dr.arpa.........
00 01 00 00 26 8d 00 2a 01 7a 04 61 72 69 6e 03          ....&..*.z.arin.
6e 65 74 00 07 64 6e 73 2d 6f 70 73 c1 f3 78 39          net..dns-ops..x9
53 b5 00 00 07 08 00 00 03 84 00 0a 8c 00 00 00          S...............
2a 30 00 00 29 10 00 00 00 00 00 00 00                   *0..)........
whereas at my desktop it works:
Code:
tfoerste@t44 ~ $  dig -x 139.199.79.28

; <<>> DiG 9.11.0-P5 <<>> -x 139.199.79.28
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: FORMERR, id: 28391
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1280
; COOKIE: 8f9e966b375afeaa (echoed)
;; QUESTION SECTION:
;28.79.199.139.in-addr.arpa.    IN      PTR

;; Query time: 48 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sat Jun 03 11:20:47 CEST 2017
;; MSG SIZE  rcvd: 67

And now - a minute later - I get at my server
Code:
mr-fox ~ # dig -x 139.199.79.28
;; Truncated, retrying in TCP mode.

; <<>> DiG 9.11.0-P5 <<>> -x 139.199.79.28
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 42059
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;28.79.199.139.in-addr.arpa.    IN      PTR

;; AUTHORITY SECTION:
139.in-addr.arpa.       9755    IN      SOA     z.arin.net. dns-ops.arin.net. 2017022901 1800 900 691200 10800

;; Query time: 3 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sat Jun 03 11:22:26 CEST 2017
;; MSG SIZE  rcvd: 109


Could somebody points me to an explanation ? TIA
FWIW: At both systems I do use dnsmasq 2.76-r1, have DNSSEC activated and this in resolv.conf :"nameserver 127.0.0.1" and this for dnsmasq:
Code:
mr-fox ~ # grep -v -e '^$' -e '^#' /etc/dnsmasq.conf
domain-needed
conf-file=/usr/share/dnsmasq/trust-anchors.conf
dnssec
dnssec-check-unsigned
server=2a01:4f8:0:a0a1::add:1010
server=2a01:4f8:0:a102::add:9999
server=2a01:4f8:0:a111::add:9898
server=213.133.98.98
server=213.133.99.99
server=213.133.100.100
cache-size=10000


Update:dnsmasq related, fixed in 2.77/Update


Last edited by toralf on Sun Jun 04, 2017 8:23 am; edited 3 times in total
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gerdesj
l33t
l33t


Joined: 29 Sep 2005
Posts: 622
Location: Yeovil, Somerset, UK

PostPosted: Sun Jun 04, 2017 12:10 am    Post subject: Re: dig: ";; Got bad packet: bad compression pointer&qu Reply with quote

What exactly are you expecting? Your "working" desktop does not return anything either: the request for a PTR record simply fails to find anything. Your server probably is NSSEC challenged in some way.
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