Connectiong to wg0 from LAN does not give access to other hosts on LAN

[alext34ms]

I have set up a bare bone installation of the wireguard-vyatta-ubnt on an ER-X and things are rocking when I connect to the router from the outside WAN interface. I have all the correct access to internal hosts.

If I on the other hand set up a tunnel from the LAN, I have internet access, but no connectivity to other hosts on my LAN networks.

Any tips or suggestions on this issue? Is this a routing issue?

My config:

firewall {
    all-ping enable
    broadcast-ping disable
    ipv6-name WANv6_IN {
        default-action drop
        description "WAN inbound traffic forwarded to LAN"
        enable-default-log
        rule 10 {
            action accept
            description "Allow established/related sessions"
            state {
                established enable
                related enable
            }
        }
        rule 20 {
            action drop
            description "Drop invalid state"
            state {
                invalid enable
            }
        }
    }
    ipv6-name WANv6_LOCAL {
        default-action drop
        description "WAN inbound traffic to the router"
        enable-default-log
        rule 10 {
            action accept
            description "Allow established/related sessions"
            state {
                established enable
                related enable
            }
        }
        rule 20 {
            action drop
            description "Drop invalid state"
            state {
                invalid enable
            }
        }
        rule 30 {
            action accept
            description "Allow IPv6 icmp"
            protocol ipv6-icmp
        }
        rule 40 {
            action accept
            description "allow dhcpv6"
            destination {
                port 546
            }
            protocol udp
            source {
                port 547
            }
        }
    }
    ipv6-receive-redirects disable
    ipv6-src-route disable
    ip-src-route disable
    log-martians enable
    name WAN_IN {
        default-action drop
        description "WAN to internal"
        rule 10 {
            action accept
            description "Allow established/related"
            log disable
            state {
                established enable
                related enable
            }
        }
        rule 20 {
            action accept
            description "Allow ICMP"
            log enable
            protocol icmp
        }
        rule 30 {
            action drop
            description "Drop invalid state"
            log enable
            state {
                invalid enable
            }
        }
    }
    name WAN_LOCAL {
        default-action drop
        description "WAN to router"
        rule 10 {
            action accept
            description "Allow established/related"
            state {
                established enable
                related enable
            }
        }
        rule 20 {
            action accept
            description WireGuard
            destination {
                port 51820
            }
            log disable
            protocol udp
        }
        rule 30 {
            action drop
            description "Drop invalid state"
            state {
                invalid enable
            }
        }
    }
    receive-redirects disable
    send-redirects enable
    source-validation disable
    syn-cookies enable
}
interfaces {
    ethernet eth0 {
        description Local
        duplex auto
        speed auto
    }
    ethernet eth1 {
        description Local
        duplex auto
        speed auto
    }
    ethernet eth2 {
        description Local
        duplex auto
        speed auto
    }
    ethernet eth3 {
        description Local
        duplex auto
        speed auto
    }
    ethernet eth4 {
        address dhcp
        description Internet
        dhcpv6-pd {
            pd 0 {
                interface switch0 {
                    host-address ::1
                    prefix-id :1
                    service slaac
                }
                prefix-length /48
            }
            rapid-commit enable
        }
        duplex auto
        firewall {
            in {
                ipv6-name WANv6_IN
                name WAN_IN
            }
            local {
                ipv6-name WANv6_LOCAL
                name WAN_LOCAL
            }
        }
        poe {
            output off
        }
        speed auto
    }
    loopback lo {
    }
    switch switch0 {
        address 192.168.1.1/24
        description Local
        mtu 1500
        switch-port {
            interface eth0 {
            }
            interface eth1 {
            }
            interface eth2 {
            }
            interface eth3 {
            }
            vlan-aware disable
        }
        vif 10 {
            address 10.100.100.1/24
            description GUEST
        }
        vif 11 {
            address 10.100.200.1/24
            description DARK
            mtu 1500
        }
    }
    wireguard wg0 {
        address 172.16.100.1/24
        listen-port 51820
        peer XXX= {
            allowed-ips 172.16.100.100/32
            description XXX
        }
        private-key ****************
        route-allowed-ips true
    }
}
service {
    dhcp-server {
        disabled false
        hostfile-update disable
        shared-network-name DARK {
            authoritative disable
            subnet 10.100.200.0/24 {
                default-router 10.100.200.1
                dns-server 10.100.200.1
                lease 86400
                start 10.100.200.100 {
                    stop 10.100.200.200
                }
            }
        }
        shared-network-name GUEST {
            authoritative disable
            subnet 10.100.100.0/24 {
                default-router 10.100.100.1
                dns-server 10.100.100.1
                lease 86400
                start 10.100.100.100 {
                    stop 10.100.100.200
                }
            }
        }
        shared-network-name LAN {
            authoritative disable
            subnet 192.168.1.0/24 {
                default-router 192.168.1.1
                dns-server 192.168.1.1
                lease 86400
                start 192.168.1.100 {
                    stop 192.168.1.200
                }
            }
        }
        static-arp disable
        use-dnsmasq enable
    }
    dns {
        forwarding {
            cache-size 150
            listen-on switch0
            listen-on switch0.10
            listen-on switch0.11
            listen-on wg0
        }
    }
    gui {
        http-port 80
        https-port 443
        older-ciphers enable
    }
    nat {
        rule 5010 {
            description "masquerade for WAN"
            outbound-interface eth4
            type masquerade
        }
    }
    ssh {
        port 22
        protocol-version v2
    }
    unms {
        disable
    }
}
system {
    analytics-handler {
        send-analytics-report false
    }
    crash-handler {
        send-crash-report false
    }
    domain-name XXXX.net
    host-name XXXX
    login {
        user XXXX {
            authentication {
                encrypted-password ****************
                public-keys XXXX {
                    key ****************
                    type ssh-rsa
                }
            }
            level admin
        }
    }
    name-server 8.8.8.8
    name-server 8.8.4.4
    ntp {
        server 0.ubnt.pool.ntp.org {
        }
        server 1.ubnt.pool.ntp.org {
        }
        server 2.ubnt.pool.ntp.org {
        }
        server 3.ubnt.pool.ntp.org {
        }
    }
    offload {
        hwnat disable
        ipsec disable
    }
    syslog {
        global {
            facility all {
                level notice
            }
            facility protocols {
                level debug
            }
        }
    }
    time-zone UTC
    traffic-analysis {
        dpi disable
        export disable
    }
}

[alext34ms]

Bump

[iGadget]

I'm running into the same issue on my ER-Lite. Although I must admit I set up Wireguard on my ER-Lite ages ago and it's very well possible I didn't set it up correctly to even work with the scenario of using Wireguard internally. It's on my to-do list to dive into this, but at the same time I'm also looking into solutions like Netmaker which I'll probably not be deploying on the ER-Lite.