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UNIX for Dummies Questions & Answers
Display multiple output lines
Post 302118512 by ennstate on Tuesday 22nd of May 2007 12:48:25 PM
05-22-2007
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LEARN ABOUT DEBIAN
shishi_realm_for_server_dns
shishi_realm_for_server_dns(3) shishi shishi_realm_for_server_dns(3) NAME
shishi_realm_for_server_dns - API function SYNOPSIS
#include <shishi.h> char * shishi_realm_for_server_dns(Shishi * handle, char * server); ARGUMENTS
Shishi * handle Shishi library handle create by shishi_init(). char * server hostname to find realm for. DESCRIPTION
Find realm for a host using DNS lookups, according to draft-ietf-krb-wg-krb-dns-locate-03.txt. Since DNS lookups may be spoofed, relying on the realm information may result in a redirection attack. In a single-realm scenario, this only achieves a denial of service, but with cross-realm trust it may redirect you to a compromised realm. For this reason, Shishi prints a warning, suggesting that the user should add the proper 'server-realm' configuration tokens instead. To illustrate the DNS information used, here is an extract from a zone file for the domain ASDF.COM: _kerberos.asdf.com. IN TXT "ASDF.COM" _kerberos.mrkserver.asdf.com. IN TXT "MARKETING.ASDF.COM" _ker- beros.salesserver.asdf.com. IN TXT "SALES.ASDF.COM" Let us suppose that in this case, a client wishes to use a service on the host foo.asdf.com. It would first query: _kerberos.foo.asdf.com. IN TXT Finding no match, it would then query: _kerberos.asdf.com. IN TXT RETURN VALUE
Returns realm for host, or NULL if not found. REPORTING BUGS
Report bugs to <bug-shishi@gnu.org>. COPYRIGHT
Copyright (C) 2002-2010 Simon Josefsson. Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. SEE ALSO
The full documentation for shishi is maintained as a Texinfo manual. If the info and shishi programs are properly installed at your site, the command info shishi should give you access to the complete manual. shishi 1.0.1 shishi_realm_for_server_dns(3)