Date: Thu, 2 Jan 2003 22:44:08 -0500 From: "Matthew Emmerton" <matt@gsicomp.on.ca> To: "Konstantin Borovik" <sysop@fb.homeunix.org>, <freebsd-questions@FreeBSD.ORG> Subject: Re: command host does not check /etc/hosts. Message-ID: <00b601c2b2da$5fa1f760$1200a8c0@gsicomp.on.ca> References: <004501c2b2d9$976940a0$0300000a@winxp>
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> Hi,
>
> Command host does not check /etc/hosts file. Is it a bug or normal
behavior?
> My sendmail could not deliver mail to localhost. I had to comment the
> following lines in the config file.
>
> # Resolve map (to check if a host exists in check_mail)
> #Kresolve host -a<OKR> -T<TEMP>
> #C{ResOk}OKR
>
> My system:
>
> uname -a
>
> FreeBSD fb.homeunix.org 4.7-STABLE FreeBSD 4.7-STABLE #1: Tue Dec 31
> 21:29:27 MST 2002 bkn@fb.homeunix.org:/usr/obj/usr/src/sys/BSD i386
>
> I did some investigation:
>
> ******************************** start
> ****************************************************
>
> bkn@fb /home/bkn> ktrace host localhost
> localhost.ab.hsia.telus.net has address 10.166.205.185
>
> ********************************** end
> ***************************************************
>
> ******************************** start
> ****************************************************
> bkn@fb /home/bkn> kdump | less
>
> ......
> 3032 host CALL readlink(0x18120194,0xbfbff770,0x3f)
> 3032 host NAMI "/etc/malloc.conf"
> 3032 host RET readlink -1 errno 2 No such file or directory
> 3032 host CALL mmap(0,0x1000,0x3,0x1002,0xffffffff,0,0,0)
> 3032 host RET mmap 403931136/0x18138000
> 3032 host CALL break(0x8896000)
> 3032 host RET break 0
> 3032 host CALL break(0x8897000)
> 3032 host RET break 0
> 3032 host CALL gettimeofday(0xbfbff3c8,0)
> 3032 host RET gettimeofday 0
> 3032 host CALL getpid
> 3032 host RET getpid 3032/0xbd8
> 3032 host CALL break(0x8898000)
> 3032 host RET break 0
> 3032 host CALL open(0x807bca2,0,0x1b6)
> 3032 host NAMI "/etc/resolv.conf"
> 3032 host RET open 3
> 3032 host CALL fstat(0x3,0xbfbff2c0)
> 3032 host RET fstat 0
> 3032 host CALL break(0x889c000)
> 3032 host RET break 0
> 3032 host CALL read(0x3,0x8898000,0x4000)
> 3032 host GIO fd 3 read 132 bytes
> "search ab.hsia.telus.net
> nameserver 216.123.198.243
> nameserver 209.115.152.130
> nameserver 209.115.131.51
> nameserver 209.115.152.150
> "
> 3032 host RET read 132/0x84
> 3032 host CALL read(0x3,0x8898000,0x4000)
> 3032 host GIO fd 3 read 0 bytes
> ""
> 3032 host RET read 0
> 3032 host CALL close(0x3)
> 3032 host RET close 0
> 3032 host CALL socket(0x2,0x2,0)
> 3032 host RET socket 3
> 3032 host CALL connect(0x3,0x8893770,0x10)
> 3032 host RET connect 0
> 3032 host CALL sendto(0x3,0xbfbef410,0x2d,0,0,0)
> 3032 host GIO fd 3 wrote 45 bytes
> "\^P\M-%\^A\0\0\^A\0\0\0\0\0\0
> localhost\^Bab\^Dhsia\^Etelus\^Cnet\0\0\^A\0\^A"
> 3032 host RET sendto 45/0x2d
> ......
> ********************************** end
> ***************************************************
>
> Have a nice day.
>
> Konstaintin
>
>
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>
Why does "localhost" resolve to 10.166.205.185?
localhost should always resolve to 127.0.0.1. If it doesn't, something is
severely broken with your (or your ISP's) DNS setup.
--
Matt Emmerton
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