Add script to test the dns seeds #11967

pull jonasschnelli wants to merge 1 commits into bitcoin:master from jonasschnelli:2017/12/seed_test changing 1 files +99 −0

jonasschnelli commented at 8:57 PM on December 20, 2017: contributor

Simple script parses the chainparams.cpp file and tests the listed seeds for...

how many IPv4 addresses they can resolve (threshold for success is 4)
how many IPv6 addresses they can resolve (threshold for success is 4)
how many connectable IPv4 peers are returned (threshold for success is 4)

Useful for monitoring as it can also test a single seed by passing in the seed domain as parameter.

My python skills are very limited,... please nitpick.

Example output:

Testing seed.bitcoin.sipa.be ...
  found IPv4: 50
  Testing port 8333...!.!.....!.!.........!.!.........!.!...........!.!........ 40 connectable peers
  found IPv6: 30
Status: OKAY

Testing dnsseed.bluematt.me ...
  found IPv4: 42
  Testing port 8333.......................................... 42 connectable peers
  found IPv6: 24
Status: OKAY

Testing dnsseed.bitcoin.dashjr.org ...
  found IPv4: 48
  Testing port 8333.........!.!.!.!.!.........................!.!...!.!.... 38 connectable peers
  found IPv6: 28
Status: OKAY

Testing seed.bitcoinstats.com ...
  found IPv4: 50
  Testing port 8333.................................................. 50 connectable peers
  found IPv6: 50
Status: OKAY

Testing seed.bitcoin.jonasschnelli.ch ...
  found IPv4: 48
  Testing port 8333.........................!.!...................... 46 connectable peers
  found IPv6: 28
Status: OKAY

Testing seed.btc.petertodd.org ...
  found IPv4: 48
  Testing port 8333.....!.!.!.!...!.!.....!.!...........!.!.........!.!........ 36 connectable peers
  found IPv6: 28
Status: OKAY

Testing testnet-seed.bitcoin.jonasschnelli.ch ...
  found IPv4: 46
  Testing port 8333.!..!.!.......!.!.!.!...!.!.!.!.!.!.!.!.!.!...!.!...!.!.!.!.!.!...!.!.!.!.!. 16 connectable peers
  found IPv6: 26
Status: OKAY

Testing seed.tbtc.petertodd.org ...
  found IPv4: 48
  Testing port 8333..!.!.!...!.!...!.!.!.!.!.!.!.!.!.!.!.!.!.!...!.!...!.!...!.!.!.!.!.!...!.!.!.!..! 14 connectable peers
  found IPv6: 28
Status: OKAY

Testing seed.testnet.bitcoin.sprovoost.nl ...
  found IPv4: 42
  Testing port 8333.!.!.!.!.!.!.!.!...!.!.!.!.!.!.!.!.!.!.!.!...!.!.!.!.!.!.!.!.!.!.!.!.....!.! 8 connectable peers
  found IPv6: 24
Status: OKAY

Testing testnet-seed.bluematt.me ...
  found IPv4: 2
  Testing port 8333.. 2 connectable peers
  found IPv6: 4
Status: Failed

Add script to test the dns seeds a27801080a
jonasschnelli added the label Scripts and tools on Dec 20, 2017
laanwj commented at 9:01 PM on December 20, 2017: member

Wouldn't maintainer-tools be a better place for this? I already have a script for that there: https://github.com/bitcoin-core/bitcoin-maintainer-tools/blob/master/check-dnsseeds.py Let's improve it there.
laanwj commented at 9:06 PM on December 20, 2017: member

Concept ACK anyhow
jonasschnelli commented at 10:15 PM on December 20, 2017: contributor

Argh. How could I miss that... yes. let me move it there.
fanquake commented at 1:08 AM on December 21, 2017: member

Closing, as this will be added/used to improve the script in the https://github.com/bitcoin-core/bitcoin-maintainer-tools/ repo.
fanquake closed this on Dec 21, 2017
laanwj commented at 8:36 AM on December 21, 2017: member

@jonasschnelli at least your implementation seems to be a lot better/thorough than my one-off hacky script :)
DrahtBot locked this on Sep 8, 2021

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