To streamline your guide for setting up Proxmox containers with OpenWRT and configuring the necessary firewall rules for SSH and HTTPS access, here’s a refined and concise approach:

### Proxmox Container Creation

Below are the commands to create three different containers, each with a unique configuration for network interfaces:

#### **Container 1 Setup:**
```bash
pct create 101 /var/lib/vz/template/cache/openwrt-rootfs.tar.xz --unprivileged 1 --arch amd64 --ostype unmanaged --hostname openwrt-0 --storage local-lvm \
--net0 name=eth0,bridge=vmbr0,firewall=1 \
--net1 name=eth1,bridge=vmbr1,firewall=1
```

#### **Container 2 Setup:**
```bash
pct create 101 /var/lib/vz/template/cache/openwrt-rootfs.tar.xz --unprivileged 1 --arch amd64 --ostype unmanaged --hostname openwrt-1 --storage local-lvm \
--net0 name=eth0,bridge=vmbr0,firewall=1 \
--net1 name=eth1,bridge=vmbr2,firewall=1
```

#### **Container 3 Setup:**
```bash
pct create 102 /var/lib/vz/template/cache/openwrt-rootfs.tar.xz --unprivileged 1 --arch amd64 --ostype unmanaged --hostname openwrt-2 --storage local-lvm \
--net0 name=eth0,bridge=vmbr0,firewall=1 \
--net1 name=eth1,bridge=vmbr3,firewall=1
```

### OpenWRT Firewall Configuration

You need to ensure that `eth1` is recognized as the WAN interface on each OpenWRT container. Configure the network settings and define firewall rules to allow SSH and HTTPS access.

#### **Define Network Interfaces**:
Update the `/etc/config/network` to reflect `eth1` as the WAN interface. This setup applies universally across your containers:

```bash
config interface 'wan'
    option ifname 'eth1'
    option proto 'dhcp'
```

#### **Update Firewall Settings**:
In `/etc/config/firewall`, append rules to allow SSH and HTTPS access. The following rules will enable connectivity for management via `eth1`:

```bash
config zone
    option name 'wan'
    list network 'wan'
    option input 'REJECT'
    option output 'ACCEPT'
    option forward 'REJECT'
    option masq '1'
    option mtu_fix '1'

config rule
    option name 'Allow-SSH'
    option src 'wan'
    option proto 'tcp'
    option dest_port '22'
    option target 'ACCEPT'

config rule
    option name 'Allow-HTTPS'
    option src 'wan'
    option proto 'tcp'
    option dest_port '443'
    option target 'ACCEPT'
```

### Applying the Configuration

After updating the configuration files, you should apply the changes:

- **Restart Network Services**:
  ```bash
  /etc/init.d/network restart
  ```

- **Reload Firewall Settings**:
  ```bash
  /etc/init.d/firewall restart
  ```

### Final Considerations

- **Security**: Implement strong authentication methods, such as key-based SSH access.
- **Testing**: Verify connectivity by accessing SSH and HTTPS from a network outside your LAN.
- **Backup Configurations**: Always back up your configurations before making significant changes.

This streamlined guide provides a clear and effective method for deploying Proxmox containers with OpenWRT, configured for remote management access through SSH and HTTPS on the WAN interface.