Summary:

SELinux is preventing /usr/sbin/snmpd from binding to port 161.

Detailed Description:

SELinux has denied the snmpd from binding to a network port 161 which does not
have an SELinux type associated with it. If snmpd should be allowed to listen on
161, use the semanage command to assign 161 to a port type that snmpd_t can bind
to (snmp_port_t, agentx_port_t).
If snmpd is not supposed to bind to 161, this could signal an intrusion attempt.

Allowing Access:

If you want to allow snmpd to bind to port 161, you can execute
# semanage port -a -t PORT_TYPE -p tcp 161
where PORT_TYPE is one of the following: snmp_port_t, agentx_port_t.
If this system is running as an NIS Client, turning on the allow_ypbind boolean
may fix the problem. setsebool -P allow_ypbind=1.

Additional Information:

Source Context                system_u:system_r:snmpd_t:s0
Target Context                system_u:object_r:reserved_port_t:s0
Target Objects                None [ tcp_socket ]
Source                        snmpd
Source Path                   /usr/sbin/snmpd
Port                          161
Host                          (removed)
Source RPM Packages           net-snmp-5.4.2.1-19.fc12
Target RPM Packages           
Policy RPM                    selinux-policy-3.6.32-92.fc12
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Plugin Name                   bind_ports
Host Name                     (removed)
Platform                      Linux (removed) 2.6.32.9-67.fc12.i686
                              #1 SMP Sat Feb 27 10:00:02 UTC 2010 i686 i686
Alert Count                   6
First Seen                    Tue 02 Mar 2010 08:13:35 PM CST
Last Seen                     Sat 13 Mar 2010 07:26:44 AM CST
Local ID                      5b13bb7e-ba18-4142-80dc-9434deec1dc4
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1268486804.388:8): avc:  denied  { name_bind } for  pid=1409 comm="snmpd" src=161 scontext=system_u:system_r:snmpd_t:s0 tcontext=system_u:object_r:reserved_port_t:s0 tclass=tcp_socket

node=(removed) type=SYSCALL msg=audit(1268486804.388:8): arch=40000003 syscall=102 success=no exit=-13 a0=2 a1=bfa1a9b0 a2=97831c a3=978dac items=0 ppid=1 pid=1409 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="snmpd" exe="/usr/sbin/snmpd" subj=system_u:system_r:snmpd_t:s0 key=(null)



Hash String generated from  bind_ports,snmpd,snmpd_t,reserved_port_t,tcp_socket,name_bind
audit2allow suggests:

#============= snmpd_t ==============
allow snmpd_t reserved_port_t:tcp_socket name_bind;