docker custom network DNS not working

so i've been trying to get DuckDNS & SWAG working, but I've hit a wall

the docker containers are not talking to each other

Everything i've been reading says to use a custom docker network...ok

docker network create dock-net

Verify the new network is created...ok

NETWORK ID     NAME       DRIVER    SCOPE
               br0        macvlan   local
               bridge     bridge    local
NEW NETWORK>>> dock-net   bridge    local
               host       host      local
               none       null      local

Change the docker network type to the new docker network...ok

[
    {
        "Name": "dock-net",
        "Created": "2021-12-27T17:39:21.8788974-05:00",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": {},
            "Config": [
                {
                    "Subnet": "172.18.0.0/16",
                    "Gateway": "172.18.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {
            "36dfbc9358703fa57b6a53cbbb6ebcfd6b90e0192cf925cbac3fa2056aa2cf00": {
                "Name": "radarr",
                "EndpointID": "cae1d2b488ecb3e4387f1c7232119a804b518f04cdb41f9bc84ce61fd68fbc88",
                "MacAddress": "02:42:ac:12:00:02",
                "IPv4Address": "172.18.0.2/16",
                "IPv6Address": ""
            },
            "559235a227d710d95ca88a3dfb12c95ff15767c3a720b9ffcd52157d822947a2": {
                "Name": "SWAG",
                "EndpointID": "a07ef92e3aa626c760bdd10b3b1375985ebdfc3854cad97946ae4f2a2d7d5272",
                "MacAddress": "02:42:ac:12:00:08",
                "IPv4Address": "172.18.0.8/16",
                "IPv6Address": ""
            },
            "96aeaec9617c0010a1abf58106690ab0483b43c8f64e454cdab8ab83b05c7261": {
                "Name": "sonarr",
                "EndpointID": "2ddc448658491f23387d476d7149f5f955d2d09b7fee72a12bde3987f5e6ef3a",
                "MacAddress": "02:42:ac:12:00:03",
                "IPv4Address": "172.18.0.3/16",
                "IPv6Address": ""
            },
            "c28d60ffcd3507e0ae16cdcaf501deafd681fac11010393a4f2640c588fd63e6": {
                "Name": "duckdns",
                "EndpointID": "249e7424ddcaa20d2ebdce39914f23afb7178a146c538fe50e758f0b1a3edd07",
                "MacAddress": "02:42:ac:12:00:06",
                "IPv4Address": "172.18.0.6/16",
                "IPv6Address": ""
            },
            "ecb56b87bc79022227dab1119222cbbd22f57a37db275f4125bdc2371bb99488": {
                "Name": "jackett",
                "EndpointID": "fad5b3b549b3518f8b9175eadacba6479846f020602b0c6853ea9c58bab87cbe",
                "MacAddress": "02:42:ac:12:00:05",
                "IPv4Address": "172.18.0.5/16",
                "IPv6Address": ""
            },
            "efaaafc1aec0cdbb7ba0d0393cefd001708a8e57ab5f8aa5908f6d848e070b10": {
                "Name": "freshrss",
                "EndpointID": "7e51ad157f2b82e226ac509661da7d56c46ea4eacc68655674ded4cb1e0e78e9",
                "MacAddress": "02:42:ac:12:00:04",
                "IPv4Address": "172.18.0.4/16",
                "IPv6Address": ""
            }
        },
        "Options": {},
        "Labels": {}
    }
]

Enable "Host access to custom networks:"...OK

Enable "Preserve user defined networks:"...OK

test connection via ping...

i cannot ping or nslookup from within any docker containers

ive restarted docker, ive restarted the containers

the only thing i haven't done is restarted the unRAID

i'm missing something...but i don't know what it is