openwrt 19.07.03 after install miniupnp luci-i18-upnp. the upnp not working.
un Jul 12 01:09:03 2020 kern.info kernel: [ 109.552130] TCP: request_sock_TCP: Possible SYN flooding on port 5000. Sending cookies. Check SNMP counters.
Sun Jul 12 01:13:04 2020 daemon.err miniupnpd[1987]: Failed to remove PCP mapping internal port 18527, protocol TCP
Sun Jul 12 01:13:04 2020 daemon.err miniupnpd[1987]: Failed to remove PCP mapping internal port 18527, protocol UDP
Sun Jul 12 01:13:10 2020 daemon.err miniupnpd[1987]: PCP MAP: failed to add mapping TCP 18527->192.168.3.202:18527 'PCP MAP e9ac251524071e6a19b830d1'
Sun Jul 12 01:13:10 2020 daemon.err miniupnpd[1987]: PCP MAP: failed to add mapping UDP 18527->192.168.3.202:18527 'PCP MAP c832ed8cb4961647118ebc7e'
Sun Jul 12 01:13:21 2020 daemon.err miniupnpd[1987]: Failed to remove PCP mapping internal port 18527, protocol TCP
Sun Jul 12 01:13:21 2020 daemon.err miniupnpd[1987]: Failed to remove PCP mapping internal port 18527, protocol UDP
Sun Jul 12 01:13:21 2020 daemon.err miniupnpd[1987]: PCP MAP: failed to add mapping TCP 22461->192.168.3.202:22461 'PCP MAP 02b1e6becd38ce1c189f524c'
Sun Jul 12 01:13:21 2020 daemon.err miniupnpd[1987]: PCP MAP: failed to add mapping UDP 22461->192.168.3.202:22461 'PCP MAP a7db22e6ffafa6d3be0518b8'
Sun Jul 12 01:13:24 2020 daemon.err miniupnpd[1987]: Failed to remove PCP mapping internal port 22461, protocol TCP
Sun Jul 12 01:13:24 2020 daemon.err miniupnpd[1987]: Failed to remove PCP mapping internal port 22461, protocol UDP
Sun Jul 12 01:13:26 2020 daemon.err miniupnpd[1987]: PCP MAP: failed to add mapping TCP 22461->192.168.3.202:22461 'PCP MAP bb315bc3b0a7375556488ebc'
Sun Jul 12 01:13:26 2020 daemon.err miniupnpd[1987]: PCP MAP: failed to add mapping UDP 22461->192.168.3.202:22461 'PCP MAP dee3194602853778d975f93c'
Sun Jul 12 01:19:11 2020 authpriv.info dropbear[3347]: Child connection from 192.168.3.202:13784
Sun Jul 12 01:19:14 2020 authpriv.notice dropbear[3347]: Password auth succeeded for 'root' from 192.168.3.202:13784
Sun Jul 12 01:24:01 2020 daemon.notice miniupnpd[1987]: shutting down MiniUPnPd
Sun Jul 12 01:26:17 2020 daemon.notice miniupnpd[3903]: HTTP listening on port 5000
Sun Jul 12 01:26:17 2020 daemon.warn miniupnpd[3903]: no HTTP IPv6 address, disabling IPv6
Sun Jul 12 01:26:17 2020 daemon.notice miniupnpd[3903]: Listening for NAT-PMP/PCP traffic on port 5351
Sun Jul 12 01:27:54 2020 daemon.err miniupnpd[3903]: PCP MAP: failed to add mapping TCP 22461->192.168.3.202:22461 'PCP MAP 4e4186cb0f05b30d17455b7d'
Sun Jul 12 01:27:54 2020 daemon.err miniupnpd[3903]: PCP MAP: failed to add mapping UDP 22461->192.168.3.202:22461 'PCP MAP 37026e1b762b5367d27efb3c'
Sun Jul 12 01:29:08 2020 daemon.err miniupnpd[3903]: Failed to remove PCP mapping internal port 22461, protocol TCP
Sun Jul 12 01:29:08 2020 daemon.err miniupnpd[3903]: Failed to remove PCP mapping internal port 22461, protocol UDP
Sun Jul 12 01:29:20 2020 daemon.err miniupnpd[3903]: PCP MAP: failed to add mapping TCP 22461->192.168.3.202:22461 'PCP MAP 4806a5cb5322766456487931'
Sun Jul 12 01:29:20 2020 daemon.err miniupnpd[3903]: PCP MAP: failed to add mapping UDP 22461->192.168.3.202:22461 'PCP MAP 7ab3abad106e6332406ac1a3'
Sun Jul 12 01:30:18 2020 daemon.err miniupnpd[3903]: Failed to remove PCP mapping internal port 22461, protocol TCP
Sun Jul 12 01:30:19 2020 daemon.err miniupnpd[3903]: Failed to remove PCP mapping internal port 22461, protocol UDP
Sun Jul 12 01:30:21 2020 daemon.err miniupnpd[3903]: PCP MAP: failed to add mapping TCP 22461->192.168.3.202:22461 'PCP MAP 500e60245fc0117c0df77c68'
Sun Jul 12 01:30:21 2020 daemon.err miniupnpd[3903]: PCP MAP: failed to add mapping UDP 22461->192.168.3.202:22461 'PCP MAP cb90da05b748e64bc428c5db'