from forum post ---> https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1185655#1185655
#
mrjcd@Will-Be-Was:~$ ssh root@citadel-station-homeworld.mrjcd.com
DD-WRT v3.0-r41771 std (c) 2019 NewMedia-NET GmbH
Release: 12/21/19
Board: Linksys EA8500
==========================================================
___ ___ _ _____ ______ ____ ___
/ _ \/ _ \___| | /| / / _ \/_ __/ _ __|_ / / _ \
/ // / // /___/ |/ |/ / , _/ / / | |/ //_ <_/ // /
/____/____/ |__/|__/_/|_| /_/ |___/____(_)___/
DD-WRT v3.0
http://www.dd-wrt.com
==========================================================
BusyBox v1.31.1 (2019-12-21 03:17:59 +03) built-in shell (ash)
root@Citadel-Station-Homeworld:~# ifconfig
ath0 Link encap:Ethernet HWaddr C0:56:27:06:39:FF
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:516926 errors:0 dropped:0 overruns:0 frame:0
TX packets:1283669 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:46461923 (44.3 MiB) TX bytes:1793570275 (1.6 GiB)
ath0.1 Link encap:Ethernet HWaddr C2:56:27:06:39:FF
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2438087 errors:0 dropped:0 overruns:0 frame:0
TX packets:8367994 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:256777756 (244.8 MiB) TX bytes:12265207107 (11.4 GiB)
ath1 Link encap:Ethernet HWaddr C0:56:27:06:3A:00
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:65341 errors:0 dropped:0 overruns:0 frame:0
TX packets:159651 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:11528528 (10.9 MiB) TX bytes:77241917 (73.6 MiB)
br0 Link encap:Ethernet HWaddr C0:56:27:06:39:FD
inet addr:10.72.28.13 Bcast:10.72.28.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2216169 errors:0 dropped:15258 overruns:0 frame:0
TX packets:5529067 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:538115131 (513.1 MiB) TX bytes:7514591348 (6.9 GiB)
br1 Link encap:Ethernet HWaddr C2:56:27:06:39:FF
inet addr:10.15.26.225 Bcast:10.15.26.255 Mask:255.255.255.224
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2285046 errors:0 dropped:87 overruns:0 frame:0
TX packets:8135807 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:173026657 (165.0 MiB) TX bytes:12036525068 (11.2 GiB)
eth0 Link encap:Ethernet HWaddr C0:56:27:06:39:FD
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:15558128 errors:0 dropped:141 overruns:0 frame:0
TX packets:8919504 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3050287734 (2.8 GiB) TX bytes:2293371165 (2.1 GiB)
Interrupt:100
imq0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
UP RUNNING NOARP MTU:1500 Metric:1
RX packets:13554747 errors:0 dropped:0 overruns:0 frame:0
TX packets:13552672 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:30
RX bytes:2156539527 (2.0 GiB) TX bytes:2152131558 (2.0 GiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MULTICAST MTU:65536 Metric:1
RX packets:248 errors:0 dropped:0 overruns:0 frame:0
TX packets:248 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:29954 (29.2 KiB) TX bytes:29954 (29.2 KiB)
tun2 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:10.172.128.241 P-t-P:10.172.128.241 Mask:255.255.255.240
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:4298 errors:0 dropped:0 overruns:0 frame:0
TX packets:2956 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:965912 (943.2 KiB) TX bytes:1538569 (1.4 MiB)
vlan1 Link encap:Ethernet HWaddr C0:56:27:06:39:FD
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1707404 errors:0 dropped:0 overruns:0 frame:0
TX packets:4345969 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:572382637 (545.8 MiB) TX bytes:5790467466 (5.3 GiB)
vlan2 Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx
inet addr:96.46.208.xxx Bcast:96.46.208.159 Mask:255.255.255.224
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5599806 errors:0 dropped:0 overruns:0 frame:0
TX packets:4489763 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:18965886215 (17.6 GiB) TX bytes:751404155 (716.5 MiB)
vlan4 Link encap:Ethernet HWaddr C0:56:27:06:39:FD
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:106 errors:0 dropped:0 overruns:0 frame:0
TX packets:83772 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:9826 (9.5 KiB) TX bytes:10788824 (10.2 MiB)
root@Citadel-Station-Homeworld:~# iptables -t raw -nvL PREROUTING
Chain PREROUTING (policy ACCEPT 10M packets, 20G bytes)
pkts bytes target prot opt in out source destination
0 0 DROP 0 -- !tun2 * 0.0.0.0/0 148.174.192.0/18
root@Citadel-Station-Homeworld:~# uptime
06:51:52 up 23:02, load average: 0.27, 0.23, 0.23
root@Citadel-Station-Homeworld:~# date
Sun Dec 22 06:51:55 CST 2019
root@Citadel-Station-Homeworld:~# exit
Connection to citadel-station-homeworld.mrjcd.com closed.
mrjcd@Will-Be-Was:~$
#
EDIT:
No reset - GUI install r41786 over r41771
she's all good
The ovpn server iptable routing looks more sane now 
mrjcd@Deb:~$ ssh root@citadel-station-homeworld.mrjcd.com
DD-WRT v3.0-r41786 std (c) 2019 NewMedia-NET GmbH
Release: 12/23/19
Board: Linksys EA8500
==========================================================
___ ___ _ _____ ______ ____ ___
/ _ \/ _ \___| | /| / / _ \/_ __/ _ __|_ / / _ \
/ // / // /___/ |/ |/ / , _/ / / | |/ //_ <_/ // /
/____/____/ |__/|__/_/|_| /_/ |___/____(_)___/
DD-WRT v3.0
http://www.dd-wrt.com
==========================================================
BusyBox v1.31.1 (2019-12-23 07:33:46 +03) built-in shell (ash)
root@Citadel-Station-Homeworld:~# iptables -t raw -nvL PREROUTING
Chain PREROUTING (policy ACCEPT 403K packets, 491M bytes)
pkts bytes target prot opt in out source destination
0 0 DROP 0 -- !tun2 * 0.0.0.0/0 10.172.128.240/28
root@Citadel-Station-Homeworld:~# uptime
06:19:29 up 35 min, load average: 0.10, 0.04, 0.01
root@Citadel-Station-Homeworld:~# date
Mon Dec 23 06:19:31 CST 2019
root@Citadel-Station-Homeworld:~# exit
Connection to citadel-station-homeworld.mrjcd.com closed.
mrjcd@Deb:~$