I am seeing this behavior in the user authentication log a lot. I thing every few minutes:
Never seen this before:
2008:05:11-19:32:31 (none) aua_edir_sync[4977]: id="3006" severity="info" sys="System" sub="auth" name="httpproxy_remove_ip(10.10.10.71): timeout"
2008:05:11-19:32:36 (none) aua_edir_sync[4977]: id="3006" severity="info" sys="System" sub="auth" name="httpproxy_remove_ip(10.10.10.73): timeout"
2008:05:11-19:32:41 (none) aua_edir_sync[4977]: id="3006" severity="info" sys="System" sub="auth" name="httpproxy_remove_ip(10.10.10.73): timeout"
2008:05:11-19:32:46 (none) aua_edir_sync[4977]: id="3006" severity="info" sys="System" sub="auth" name="httpproxy_remove_ip(10.10.10.71): timeout"
2008:05:11-19:32:51 (none) aua_edir_sync[4977]: id="3006" severity="info" sys="System" sub="auth" name="httpproxy_remove_ip(10.10.10.73): timeout"
2008:05:11-19:32:56 (none) aua_edir_sync[4977]: id="3006" severity="info" sys="System" sub="auth" name="httpproxy_remove_ip(10.10.10.71): timeout"
2008:05:11-19:33:01 (none) aua_edir_sync[4977]: id="3006" severity="info" sys="System" sub="auth" name="httpproxy_remove_ip(10.10.10.73): timeout"
2008:05:11-19:33:22 (none) aua_edir_sync[4977]: id="3006" severity="info" sys="System" sub="auth" name="httpproxy_remove_ip(10.10.10.73): timeout"
2008:05:11-19:33:27 (none) aua_edir_sync[4977]: id="3006" severity="info" sys="System" sub="auth" name="httpproxy_remove_ip(10.10.10.73): timeout"
2008:05:11-19:33:32 (none) aua_edir_sync[4977]: id="3006" severity="info" sys="System" sub="auth" name="httpproxy_remove_ip(10.10.10.73): timeout"