On 12/10/2010 08:46 AM, Baird, Josh wrote: > > Maybe I am missing something here.. but what does 'sudo' have to do > with DNS resolution? > > *From:* centos-bounces at centos.org [mailto:centos-bounces at centos.org] > *On Behalf Of *Steve Clark > *Sent:* Friday, December 10, 2010 7:44 AM > *To:* CentOS mailing list > *Subject:* [CentOS] sudo doing DNS lookup > > Hi, > > I have a confusing problem. I have two centos 5,5 boxes. Both have > sudo.i386 1.7.2p1-9.el5_5 > installed > > I am using the same sudoers file, but the one on box A keeps trying to > do DNS lookups > while the one on box B does not. How do I disable this DNS lookup? > > Thanks for any info. > > That is a very good question. But here is part of an strace of sudo cat /etc/hosts socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 4 connect(4, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("198.6.1.4")}, 28) = 0 fcntl64(4, F_GETFL) = 0x2 (flags O_RDWR) fcntl64(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0 gettimeofday({1291986809, 169934}, NULL) = 0 poll([{fd=4, events=POLLOUT}], 1, 0) = 1 ([{fd=4, revents=POLLOUT}]) send(4, "\1\231\1\0\0\1\0\0\0\0\0\0\5Z7070\tnetwolves\3com"..., 51, MSG_NOSIGNAL) = 51 poll([{fd=4, events=POLLIN}], 1, 5000) = 1 ([{fd=4, revents=POLLIN}]) ioctl(4, FIONREAD, [113]) = 0 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 close(4) -- Stephen Clark *NetWolves* Sr. Software Engineer III Phone: 813-579-3200 Fax: 813-882-0209 Email: steve.clark at netwolves.com http://www.netwolves.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20101210/b640705c/attachment-0005.html>