Date: 2 Jan 1997 20:54:17 GMT From: peter@spinner.DIALix.COM (Peter Wemm) To: freebsd-current@freebsd.org Subject: Re: Resolver Error 0 (no error) Message-ID: <5ah79p$8rh$3@haywire.DIALix.COM> References: <199701020846.JAA03861@uriah.heep.sax.de>
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In article <199701021626.LAA10553@skynet.ctr.columbia.edu>,
wpaul@skynet.ctr.columbia.edu (Bill Paul) writes:
> This reminds me:
>
> [/homes/wpaul]:marple{15}% traceroute freebsd.org
> traceroute to freebsd.org (204.216.27.18), 30 hops max, 40 byte packets
> 1 ctr-gw.ctr.columbia.edu (128.59.74.1) 2.741 ms 2.465 ms 2.467 ms
> 2 mudd-gw.net.columbia.edu (128.59.62.1) 4.353 ms 3.124 ms 3.038 ms
> 3 128.59.45.2 (128.59.45.2) 45.279 ms 49.961 ms 51.045 ms
> 4 nyser-gw.net.columbia.edu (128.59.247.1) 189.497 ms 112.663 ms 100.243 ms
> 5 169.130.12.5 (169.130.12.5) 91.750 ms 98.124 ms 102.126 ms
> 6 169.130.1.101 (169.130.1.101) 82.285 ms 74.644 ms 79.732 ms
> 7 144.228.60.1 (144.228.60.1) 281.282 ms 141.881 ms 219.776 ms
> 8 198.67.2.11 (198.67.2.11) 118.587 ms 110.496 ms 113.735 ms
> 9 144.228.10.102 (144.228.10.102) 259.932 ms 149.262 ms 149.992 ms
> 10 144.228.10.50 (144.228.10.50) 231.764 ms 217.007 ms 238.777 ms
> 11 pb-nap.crl.net (198.32.128.20) 147.369 ms 156.685 ms 149.741 ms
> 12 E0-CRL-SFO-02-E0X0.US.CRL.NET (165.113.55.2) 166.600 ms 183.481 ms 253.803 ms
> 13 T1-CDROM-00-EX.US.CRL.NET (165.113.118.2) 131.645 ms 135.416 ms 163.520 ms
> 14 freefall.FreeBSD.ORG (204.216.27.18) 160.483 ms * 312.308 ms
> [/homes/wpaul]:marple{16}% uname -sr
> FreeBSD 2.2-BETA_A
>
> Hops 5 through 10 didn't reverse resolve correctly, but:
Actually they did.. :-] They resolved to illegal unpresentable data..
> [/homes/wpaul]:marple{17}% nslookup 169.130.12.5
> Server: sirius.ctr.columbia.edu
> Address: 128.59.64.60
>
> Name: ny-nyc-2-H4/0-T3.nysernet.net
> Address: 169.130.12.5
>
> With FreeBSD 2.1.0:
>
> [/home/wpaul]:OmniVAX{36}% traceroute freebsd.org
> traceroute to freebsd.org (204.216.27.18), 30 hops max, 40 byte packets
> 1 ctr-gw.ctr.columbia.edu (128.59.64.1) 169.288 ms 226.311 ms 197.468 ms
> 2 mudd-gw.net.columbia.edu (128.59.62.1) 175.367 ms 227.903 ms 347.029 ms
> 3 128.59.45.2 (128.59.45.2) 222.734 ms 233.502 ms 218.619 ms
> 4 nyser-gw.net.columbia.edu (128.59.247.1) 208.978 ms 309.440 ms 224.325 ms
> 5 ny-nyc-2-H4/0-T3.nysernet.net (169.130.12.5) 298.337 ms 271.123 ms 266.279 ms
> 6 ny-pen-1-H2/0-T3.nysernet.net (169.130.1.101) 363.654 ms 297.084 ms 362.543 ms
> 7 sl-pen-1-F0/0.sprintlink.net (144.228.60.1) 295.228 ms 426.730 ms 339.896 ms
> 8 sl-pen-11-F/T.sprintlink.net (198.67.2.11) 239.456 ms 283.974 ms 248.982 ms
> 9 sl-stk-1-H12/0-T3.sprintlink.net (144.228.10.102) 448.619 ms 335.131 ms *
> 10 * * sl-stk-nap-H2/0-T3.sprintlink.net (144.228.10.50) 433.355 ms
> 11 pb-nap.crl.net (198.32.128.20) 371.726 ms 397.078 ms 362.136 ms
> 12 E0-CRL-SFO-02-E0X0.US.CRL.NET (165.113.55.2) 373.627 ms 464.830 ms 397.843 ms
> 13 T1-CDROM-00-EX.US.CRL.NET (165.113.118.2) 398.602 ms 393.075 ms 479.812 ms
> 14 freefall.FreeBSD.ORG (204.216.27.18) 343.168 ms 467.463 ms 371.996 ms
And check to see what freebsd-2.1.0 does when getting a PTR record containing
an '&', '|' or ';' character and consider the implications for hostnames
being passed to commands from gethostbyaddr() via system().
> Granted this is Sprint we're talking about here, but this seems a little
> odd. My named is from BIND 4.9.5-REL.
>
> -Bill
The version of named you are running would complain bitterly if it you tried
to do a zone transfer of the sprintlink reverse mapping tables.
The Authors of BIND didn't make the decision to make this change lightly..
Bind's resolver is now inline with other vendors.
Fortunately, DNS corruption seems to be forcing the old named's out of
business, so it will not be long before the last of these illegal names
are gone. (Incidently, it's the checks in the recent bind's that make it
more resistant to corruption that are causing the timeouts Joerg is seeing).
-Peter
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