Modem/router in bridge, telnet to modem on same subnet

Hi,

I've got the following:

pc linux (192.168.1.10) => router LEDE (192.168.1.100) === bridged ====> modem (192.168.1.1) === ADSL ===> internet

my modem has port 23 (telnet) open to allow admin login for some basic commands.

I'm a programmer however my networking is shameful. How can I, on the PC, telnet to the modem?

I had tried steps in this post: [SOLVED] How to access the modem (which is in bridge mode)?

ifconfig uci get network.wan.ifname:0 192.168.1.1 netmask 255.255.255.0
iptables -t nat -I POSTROUTING -o uci get network.wan.ifname -d 192.168.1.0/24 -j MASQUERADE

but no joy.

the correct way is here :

if its all on the same netmask just telnet -o 192.168.1.1, i would set my lan to another dhcp range though say like 192.168.2.1

192.168.1.1                          192.168.2.1                192.168.2.2-50
Modem ----------->Bridged mode------->Router---------------------->Lan/Switches/PC/Server
forward dhcp            acquire wan ip address                    range of hosts for dhcp server