1DNSREPLAY(1)             PowerDNS Authoritative Server            DNSREPLAY(1)
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NAME

6       dnsreplay - A PowerDNS nameserver debugging tool
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SYNOPSIS

9       dnsreplay [OPTION]... FILENAME ADDRESS [PORT]
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DESCRIPTION

12       This  program  takes recorded questions and answers and replays them to
13       the specified nameserver and reporting afterwards which  percentage  of
14       answers matched, were worse or better.
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16       dnsreplay  compares  the answers and some other metrics with the actual
17       ones with those found in the dumpfile.
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19       By default it only replay queries with recursion-desired flag set.
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OPTIONS

22       FILENAME
23              is expected to be an PCAP file. The queries are send to the  DNS
24              server specified as ADDRESS and PORT.
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26       ADDRESS
27              IPv4 or IPv6 address of the nameserver to replay FILENAME to.
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29       PORT   if omitted, 53 will be used.
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31       --help, -h
32              Show summary of options.
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34       --ecs-mask <VAL>
35              When  EDNS  forwarding  an IP address, mask out first octet with
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38       --ecs-stamp <FLAG>
39              Add original IP address as EDNS Client Subnet Option  when  for‐
40              warding to reference server
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42       --pcap-dns-port <VAL>
43              Look at packets from or to this port in the PCAP. Default is 53.
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45       --packet-limit <NUM>
46              Stop  after  replaying  NUM packets. Default for NUM is 0, which
47              means no limit.
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49       --quiet <FLAG>
50              If FLAG is set to 1. dnsreplay will not be very noisy  with  its
51              output. This is the default.
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53       --recursive <FLAG>
54              If FLAG is set to 1. dnsreplay will only replay queries with re‐
55              cursion desired flag set. This is the default.
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57       --speedup <FACTOR>
58              Replay queries with this speedup FACTOR. Default is 1.
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60       --timeout-msec <MSEC>
61              Wait at least MSEC milliseconds for a reply. Default is 500.
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BUGS

64       dnsreplay has no certain handling for timeouts. It  handles  around  at
65       most 65536 outstanding answers.
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SEE ALSO

68       pcap(3PCAP), tcpdump(8), dnswasher(1)
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AUTHOR

71       PowerDNS.COM BV
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74       2001-2021, PowerDNS.COM BV
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79                                 Nov 09, 2021                     DNSREPLAY(1)
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