Summary:

SELinux is preventing /usr/sbin/snmptrapd from connecting to port 161.

Detailed Description:

SELinux has denied snmptrapd from connecting to a network port 161 which does
not have an SELinux type associated with it. If snmptrapd should be allowed to
connect on 161, use the semanage command to assign 161 to a port type that
snmpd_t can connect to (agentx_port_t, ldap_port_t, dns_port_t, ocsp_port_t,
kerberos_port_t).
If snmptrapd is not supposed to connect to 161, this could signal a intrusion
attempt.

Allowing Access:

If you want to allow snmptrapd to connect to 161, you can execute
semanage port -a -t PORT_TYPE -p tcp 161
where PORT_TYPE is one of the following: agentx_port_t, ldap_port_t, dns_port_t,
ocsp_port_t, kerberos_port_t.

Additional Information:

Source Context                unconfined_u:system_r:snmpd_t:s0
Target Context                system_u:object_r:reserved_port_t:s0
Target Objects                None [ tcp_socket ]
Source                        snmptrapd
Source Path                   /usr/sbin/snmptrapd
Port                          161
Host                          (removed)
Source RPM Packages           net-snmp-5.4.2.1-19.fc12
Target RPM Packages           
Policy RPM                    selinux-policy-3.6.32-89.fc12
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Plugin Name                   connect_ports
Host Name                     (removed)
Platform                      Linux (removed)
                              2.6.31.12-174.2.22.fc12.i686 #1 SMP Fri Feb 19
                              19:26:06 UTC 2010 i686 i686
Alert Count                   23455
First Seen                    Wed 24 Feb 2010 10:31:02 PM CST
Last Seen                     Mon 01 Mar 2010 01:11:57 AM CST
Local ID                      ee6ba1b2-7b3e-43de-acc7-f24debfcd326
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1267427517.940:24406): avc:  denied  { name_connect } for  pid=26257 comm="snmptrapd" dest=161 scontext=unconfined_u:system_r:snmpd_t:s0 tcontext=system_u:object_r:reserved_port_t:s0 tclass=tcp_socket

node=(removed) type=SYSCALL msg=audit(1267427517.940:24406): arch=40000003 syscall=102 success=no exit=-13 a0=3 a1=bfb85de0 a2=2f357c a3=ea5fa0 items=0 ppid=1 pid=26257 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=1 comm="snmptrapd" exe="/usr/sbin/snmptrapd" subj=unconfined_u:system_r:snmpd_t:s0 key=(null)



Hash String generated from  connect_ports,snmptrapd,snmpd_t,reserved_port_t,tcp_socket,name_connect
audit2allow suggests:

#============= snmpd_t ==============
#!!!! This avc can be allowed using the boolean 'allow_ypbind'

allow snmpd_t reserved_port_t:tcp_socket name_connect;