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On 12/10/2010 08:46 AM, Baird, Josh wrote:
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<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">Maybe
I am missing something here.. but what does ‘sudo’ have to
do with DNS resolution?<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span
style="font-size: 10pt; font-family: "Tahoma","sans-serif"; color: windowtext;">From:</span></b><span
style="font-size: 10pt; font-family: "Tahoma","sans-serif"; color: windowtext;">
<a class="moz-txt-link-abbreviated" href="mailto:centos-bounces@centos.org">centos-bounces@centos.org</a>
[<a class="moz-txt-link-freetext" href="mailto:centos-bounces@centos.org">mailto:centos-bounces@centos.org</a>] <b>On Behalf Of </b>Steve Clark<br>
<b>Sent:</b> Friday, December 10, 2010 7:44 AM<br>
<b>To:</b> CentOS mailing list<br>
<b>Subject:</b> [CentOS] sudo doing DNS lookup<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom: 12pt;"><span
style="font-family: "Arial","sans-serif";">Hi,<br>
<br>
I have a confusing problem. I have two centos 5,5 boxes. Both have<br>
sudo.i386
1.7.2p1-9.el5_5
installed<br>
<br>
I am using the same sudoers file, but the one on box A keeps trying to
do DNS
lookups<br>
while the one on box B does not. How do I disable this DNS lookup?<br>
<br>
Thanks for any info.</span><o:p></o:p></p>
<br>
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<br>
That is a very good question.<br>
<br>
But here is part of an strace of<br>
sudo cat /etc/hosts<br>
<br>
<br>
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 4<br>
connect(4, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("198.6.1.4")}, 28) = 0<br>
fcntl64(4, F_GETFL) = 0x2 (flags O_RDWR)<br>
fcntl64(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0<br>
gettimeofday({1291986809, 169934}, NULL) = 0<br>
poll([{fd=4, events=POLLOUT}], 1, 0) = 1 ([{fd=4, revents=POLLOUT}])<br>
send(4, "\1\231\1\0\0\1\0\0\0\0\0\0\5Z7070\tnetwolves\3com"..., 51,
MSG_NOSIGNAL) = 51<br>
poll([{fd=4, events=POLLIN}], 1, 5000) = 1 ([{fd=4, revents=POLLIN}])<br>
ioctl(4, FIONREAD, [113]) = 0<br>
recvfrom(4, "\1\231\201\203\0\1\0\0\0\1\0\0\5Z7070\tnetwolves\3com"...,
1024, 0, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("198.6.1.4")}, [16]) = 113<br>
close(4) <br>
<br>
<br>
<div class="moz-signature">-- <br>
Stephen Clark<br>
<b>NetWolves</b><br>
Sr. Software Engineer III<br>
Phone: 813-579-3200<br>
Fax: 813-882-0209<br>
Email: <a class="moz-txt-link-abbreviated" href="mailto:steve.clark@netwolves.com">steve.clark@netwolves.com</a><br>
<a class="moz-txt-link-freetext" href="http://www.netwolves.com">http://www.netwolves.com</a><br>
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