SELinux is preventing unbound-anchor from name_bind access on the udp_socket port 61000.

*****  Plugin bind_ports (92.2 confidence) suggests   ************************

If you want to allow unbound-anchor to bind to network port 61000
Then you need to modify the port type.
Do
# semanage port -a -t PORT_TYPE -p udp 61000
    where PORT_TYPE is one of the following: afs3_callback_port_t, afs_bos_port_t, afs_fs_port_t, afs_ka_port_t, afs_pt_port_t, afs_vl_port_t, amanda_port_t, amavisd_recv_port_t, amavisd_send_port_t, amqp_port_t, aol_port_t, apc_port_t, apcupsd_port_t, appswitch_emp_port_t, asterisk_port_t, babel_port_t, bacula_port_t, bctp_port_t, bfd_control_port_t, bgp_port_t, boinc_client_port_t, boinc_port_t, brlp_port_t, certmaster_port_t, clamd_port_t, clockspeed_port_t, cluster_port_t, cma_port_t, cobbler_port_t, collectd_port_t, commplex_link_port_t, commplex_main_port_t, condor_port_t, conman_port_t, connlcli_port_t, conntrackd_port_t, couchdb_port_t, ctdb_port_t, cvs_port_t, cyphesis_port_t, cyrus_imapd_port_t, daap_port_t, dbskkd_port_t, dcc_port_t, dccm_port_t, dey_keyneg_port_t, dey_sapi_port_t, dhcpc_port_t, dict_port_t, distccd_port_t, dns_port_t, dnssec_port_t, dogtag_port_t, embrace_dp_c_port_t, ephemeral_port_t, epmd_port_t, fac_restore_port_t, firepower_port_t, flash_port_t, fmpro_internal_port_t, freeipmi_port_t, gatekeeper_port_t, gds_db_port_t, gear_port_t, geneve_port_t, giftd_port_t, git_port_t, glance_port_t, glance_registry_port_t, gluster_port_t, gpsd_port_t, hadoop_datanode_port_t, hadoop_namenode_port_t, hddtemp_port_t, howl_port_t, hplip_port_t, http_cache_port_t, i18n_input_port_t, ibm_dt_2_port_t, imaze_port_t, intermapper_port_t, interwise_port_t, ionixnetmon_port_t, ipp_port_t, ipsecnat_port_t, ircd_port_t, iscsi_port_t, isns_port_t, jabber_client_port_t, jabber_interserver_port_t, jabber_router_port_t, jacorb_port_t, jboss_debug_port_t, jboss_management_port_t, jboss_messaging_port_t, kerberos_port_t, keystone_port_t, kubernetes_port_t, l2tp_port_t, lirc_port_t, llmnr_port_t, lltng_port_t, lsm_plugin_port_t, luci_port_t, mail_port_t, mailbox_port_t, matahari_port_t, memcache_port_t, milter_port_t, mmcc_port_t, mongod_port_t, monopd_port_t, mountd_port_t, movaz_ssc_port_t, mpd_port_t, ms_streaming_port_t, msnp_port_t, mssql_port_t, munin_port_t, mxi_port_t, mysqld_port_t, mysqlmanagerd_port_t, mythtv_port_t, nessus_port_t, netport_port_t, netsupport_port_t, neutron_port_t, nfs_port_t, nmea_port_t, nodejs_debug_port_t, nsca_port_t, nsd_control_port_t, ntop_port_t, oa_system_port_t, ocsp_port_t, openflow_port_t, openhpid_port_t, openqa_port_t, openqa_websockets_port_t, openvpn_port_t, openvswitch_port_t, oracle_port_t, osapi_compute_port_t, ovsdb_port_t, pdps_port_t, pegasus_http_port_t, pegasus_https_port_t, pgpkeyserver_port_t, pingd_port_t, pki_kra_port_t, pki_ocsp_port_t, pki_ra_port_t, pki_tks_port_t, pki_tps_port_t, pktcable_cops_port_t, postfix_policyd_port_t, postgresql_port_t, postgrey_port_t, pptp_port_t, prelude_port_t, presence_port_t, preupgrade_port_t, priority_e_com_port_t, prosody_port_t, ptal_port_t, pulseaudio_port_t, puppet_port_t, pxe_port_t, pyzor_port_t, qpasa_agent_port_t, rabbitmq_port_t, radacct_port_t, radius_port_t, radsec_port_t, razor_port_t, redis_port_t, repository_port_t, ricci_modcluster_port_t, ricci_port_t, rkt_port_t, rtp_media_port_t, rtsclient_port_t, rtsp_port_t, salt_port_t, sap_port_t, saphostctrl_port_t, servistaitsm_port_t, sge_port_t, shellinaboxd_port_t, sieve_port_t, sip_port_t, sixxsconfig_port_t, smntubootstrap_port_t, soundd_port_t, speech_port_t, squid_port_t, ssdp_port_t, statsd_port_t, svn_port_t, swift_port_t, sype_transport_port_t, syslog_tls_port_t, tangd_port_t, tcs_port_t, tor_port_t, traceroute_port_t, tram_port_t, transproxy_port_t, trisoap_port_t, trivnet1_port_t, unreserved_port_t, ups_port_t, us_cli_port_t, varnishd_port_t, versa_tek_port_t, virt_migration_port_t, virt_port_t, virtual_places_port_t, vnc_port_t, wap_wsp_port_t, wccp_port_t, websm_port_t, whois_port_t, winshadow_port_t, wsdapi_port_t, wsicopy_port_t, xen_port_t, xfs_port_t, xinuexpansion3_port_t, xinuexpansion4_port_t, xodbc_connect_port_t, xserver_port_t, zabbix_agent_port_t, zabbix_port_t, zebra_port_t, zented_port_t, zookeeper_client_port_t, zookeeper_election_port_t, zookeeper_leader_port_t, zope_port_t.

*****  Plugin catchall_boolean (7.83 confidence) suggests   ******************

If you want to allow nis to enabled
Then you must tell SELinux about this by enabling the 'nis_enabled' boolean.

Do
setsebool -P nis_enabled 1

*****  Plugin catchall (1.41 confidence) suggests   **************************

If you believe that unbound-anchor should be allowed name_bind access on the port 61000 udp_socket by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'unbound-anchor' --raw | audit2allow -M my-unboundanchor
# semodule -X 300 -i my-unboundanchor.pp

Additional Information:
Source Context                system_u:system_r:named_t:s0
Target Context                system_u:object_r:port_t:s0
Target Objects                port 61000 [ udp_socket ]
Source                        unbound-anchor
Source Path                   unbound-anchor
Port                          61000
Host                          localhost
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.14.3-41.el8_2.2.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     localhost
Platform                      Linux localhost 4.18.0-193.el8.x86_64 #1 SMP Fri Mar
                              27 14:35:58 UTC 2020 x86_64 x86_64
Alert Count                   1
First Seen                    2020-05-02 15:11:35 CEST
Last Seen                     2020-05-02 15:11:35 CEST
Local ID                      ee2a2c0e-2bb3-42ed-966a-1af4fb01a009

Raw Audit Messages
type=AVC msg=audit(1588425095.107:63): avc:  denied  { name_bind } for  pid=2018 comm="unbound-anchor" src=61000 scontext=system_u:system_r:named_t:s0 tcontext=system_u:object_r:port_t:s0 tclass=udp_socket permissive=0

Hash: unbound-anchor,named_t,port_t,udp_socket,name_bind