RP4 as wifi bridge

I want to use my RP4 as a access point / bridge, meaning i have the Pi connected via LAN to my switch (unmanaged), the Pi should have a static ip (e.g. 192.168.85.4), clients should be able to connect to the wifi of the pi and get a IP from my local DHCP server via LAN (not from the Pi). Everything should be all one network 192.168.85.0/24 with traffic being able to go in both directions (basiaclly removing the Access Point Part of my router). I already tried a lot the past 48 hours but im lost and i cant get it to work (even it should not be that hard i guess). Anyone can guide me through a config? Im using raspi os lite

https://raspberrytips.com/access-point-setup-raspberry-pi/

Well, this is using the Pi as DHCP which i dont want

Don't do that part then!

so just leave the dhcpcd.conf empty? i just saw the guide enables wifi from the raspi-config, that could have been a big issue, because my wifi gor shut down by rfkill before ill give it a try, just reformatted again to have everything clean

setup RaspAP

using raspAP gave me even more trouble. Using network manager gave me the best results so far

so the best method i found so far: - reimage the raspi with current os - update it - raspi config -> set wifi country to germany to disable rfkill - sudo nmcli con add con-name hotspot ifname wlan0 type wifi ssid "Wifi-Name" - sudo nmcli con modify hotspot wifi-sec.key-mgmt wpa-psk - sudo nmcli con modify hotspot wifi-sec.psk "Wifi-PW" - sudo nmcli con modify hotspot 802-11-wireless.mode ap 802-11-wireless.band bg ipv4.method shared rebooted and could connect successfully. - sudo nmtui to change the ip of the wired connection to a static ip. ip a: 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host noprefixroute valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether dc:a6:32:15:c9:7f brd ff:ff:ff:ff:ff:ff inet 192.168.85.3/24 brd 192.168.85.255 scope global noprefixroute eth0 valid_lft forever preferred_lft forever inet6 fe80::7ee8:9477:8c11:6f76/64 scope link noprefixroute valid_lft forever preferred_lft forever 3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether dc:a6:32:15:c9:80 brd ff:ff:ff:ff:ff:ff inet 10.42.0.1/24 brd 10.42.0.255 scope global noprefixroute wlan0 valid_lft forever preferred_lft forever inet6 fd34:76df:1dad:d0ed:6a97:97a0:e31c:901b/64 scope global dynamic noprefixroute valid_lft 1750sec preferred_lft 1750sec inet6 fe80::6d88:421a:707a:aee9/64 scope link noprefixroute valid_lft forever preferred_lft forever The wifi address subnet is 10.42.0.0/24 but id like it to be 192.168.85.0/24 Also the routing works as expected for a hotspot, so i can not ping the wifi clients from the LAN

Issues: - PI serves as DHCP Server for wireless. This should be done by my local DHCP Server. - Routing only works from wireless to lan, not from lan to wireless

there is no specific part that i can leave out for this case