Poprawiając polityki bezpieczeństwa natknąłem się na ciekawe narzędzie o nazwie setroubleshoot. Efekt pracy programu na przykładzie jednego komunikatu:

Summary:
SELinux is preventing httpd (httpd_t) "name_bind" to "Unknown" (httpd_t).
Detailed Description:
SELinux denied access requested by httpd. It is not expected that this access is
required by httpd and this access may signal an intrusion attempt. It is also
possible that the specific version or configuration of the application is
causing it to require additional access.
Allowing Access:
You can generate a local policy module to allow this access - see FAQ
(http://fedora.redhat.com/docs/selinux-faq-fc5/#id2961385) Or you can disable
SELinux protection altogether. Disabling SELinux protection is not recommended.
Please file a bug report (http://bugzilla.redhat.com/bugzilla/enter_bug.cgi)
against this package.
Additional Information:
Source Context                system_u:system_r:httpd_t
Target Context                system_u:object_r:httpd_t
Target Objects                None [ tcp_socket ]
Source                        httpd
Source Path                   /usr/sbin/httpd
Port                          80
Host                          "Unknown"
Source RPM Packages           httpd-2.2.3-43.el5.centos.3
Target RPM Packages
Policy RPM                    selinux-policy-2.4.6-279.el5_5.1
Selinux Enabled               True
Policy Type                   strict
MLS Enabled                   True
Enforcing Mode                Enforcing
Plugin Name                   catchall
Host Name                     centos.server.localnet
Platform                      Linux centos.server.localnet 2.6.18-194.3.1.el5 #1
SMP Thu May 13 13:09:10 EDT 2010 i686 i686
Alert Count                   6
First Seen                    Fri Oct  1 21:31:40 2010
Last Seen                     Fri Oct  1 21:37:40 2010
Local ID                      b5f4e8ef-6325-4ccb-ae7f-c898462b77df
Line Numbers                  17, 18, 19, 20, 23, 24, 25, 26, 37, 38, 39, 40
Raw Audit Messages
type=AVC msg=audit(1285961860.699:19487): avc:  denied  { name_bind } for  pid=8616 comm="httpd" src=80 scontext=system_u:system_r:httpd_t:s0 tcontext=system_u:object_r:httpd_t:s0 tclass=tcp_socket
type=SYSCALL msg=audit(1285961860.699:19487): arch=40000003 syscall=102 success=no exit=-13 a0=2 a1=bfa2ec80 a2=186988 a3=8917858 items=0 ppid=8615 pid=8616 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts1 ses=3181 comm="httpd" exe="/usr/sbin/httpd" subj=system_u:system_r:httpd_t:s0 key=(null)