Route between ZeroTier and Physical Networks - ZeroTier Knowledge Base - Confluence
本文由 简悦 SimpRead 转码， 原文地址 zerotier.atlassian.net
This seems to be the simplest pattern for getting remote access to your LAN. It doesn’t require acces……
This seems to be the simplest pattern for getting remote access to your LAN. It doesn’t require access to the LAN’s router or have some of the pitfalls of bridging. This requires a Linux PC or VM, something that runs iptables, on your LAN. A raspberrypi works. This is a NAT/Masquerade setup.
Possible Disadvantages:
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No broadcast/multicast across networks (but the mobile OS’s don’t allow this anyways).
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Can’t initiate connections from the LAN to an external ZeroTier client.
Summary
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Install ZeroTier
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Add a managed route to the ZeroTier network (at my.zerotier.com)
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Enable IP Forwarding
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Configure iptables
Required information
For Example:
Info | Example | Shorthand Name Below |
|---|
Info | Example | Shorthand Name Below |
|---|---|---|
ZeroTier Network ID | d5e04297a19bbd70 | $NETWORK_ID |
ZeroTier Interface Name | zt7nnig26 | $ZT_IFACE |
Physical Interface Name | eth0 | $PHY_IFACE |
ZeroTier subnet | 172.27.0.0/16 | |
Physical subnet | 192.168.100.0/24 | $PHY_SUB |
ZeroTier IP Address of "Router" | 172.27.0.1 | $ZT_ADDR |
Install ZeroTier
https://www.zerotier.com/download/
1 2 sudo zerotier-cli join $NETWORK_ID sudo zerotier-cli listnetworks
Authorize it at my.zerotier.com/network/$NETWORK_ID
The listnetworks output has the ZeroTier Interface name under
Configure the ZeroTier managed route
At my.zerotier.com/network/$NETWORK_ID -> Settings -> Managed Routes
This adds another route to every device joined to the ZeroTier network.
Destination | (Via) |
|---|---|
$PHY_SUB | $ZT_ADDR |
For example:
Destination | (Via) |
|---|---|
192.168.100.0/23 | 172.27.0.1 |
Configure the destination route as slightly larger than the actual physical subnet, here /23 instead of /24 (a smaller number is a bigger subnet in this notation) This makes devices that are on both the physical and the ZeroTier network prefer the physical connection.
Enable IP forwarding
This can vary depending on linux distribution. Typically:
Edit /etc/sysctl.conf to uncomment net.ipv4.ip_forward. This enables forwarding at boot.
To enable it now
1 sudo sysctl -w net.ipv4.ip_forward=1
Configure iptables
Assign some shell variables (personalize these)
1 PHY_IFACE=eth0; ZT_IFACE=zt7nnig26
Add rules to iptables
1 2 3 sudo iptables -t nat -A POSTROUTING -o $PHY_IFACE -j MASQUERADE sudo iptables -A FORWARD -i $PHY_IFACE -o $ZT_IFACE -m state --state RELATED,ESTABLISHED -j ACCEPT sudo iptables -A FORWARD -i $ZT_IFACE -o $PHY_IFACE -j ACCEPT
Save iptables rules for next boot
1 2 sudo apt install iptables-persistent sudo bash -c iptables-save > /etc/iptables/rules.v4
Test!
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Turn off wifi on your phone
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Join it to the zerotier network, authorize it
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Try to access something on the physical LAN