nebula

caution
  • 目前直连为主,没有类似 tinc 的通过节点路由的逻辑 - #218
    • 通过 lighthouse 支持路由一个网络
  • 不支持 unsafe_routes 之外自定义路由 - #274
    • 只能使用预先定义的网络 - 不能 ip ro add
    • 不支持 flannel+nebula
  • 不能 ping 节点
# macOS
brew install nebula
# AlpineLinux
apk add nebula
# ca.crt ca.key
nebula-cert ca -name "Wener"
# Lighthouse
# lh-1.crt lh-1.key
nebula-cert sign -name "lh-1" -ip "192.168.100.1/24"
cat <<LH > lh-1.yaml
pki:
ca: /home/admin/ca.crt
cert: /home/admin/lh-1.crt
key: /home/admin/lh-1.key
static_host_map:
"192.168.100.1": ["100.64.22.11:4242"]
lighthouse:
am_lighthouse: true
listen:
host: 0.0.0.0
port: 4242
firewall:
outbound:
- port: any
proto: any
host: any
inbound:
- port: any
proto: icmp
host: any
- port: 22
proto: tcp
group: ssh
LH
# 同步证书到 lighthouse 节点
scp ca.crt lh-1.yaml lh-1.crt lh-1.key [email protected]:~
# 启动服务
ssh [email protected]ouse sudo ./nebula -config lh-1.yaml
# laptop
# 添加 ssh 分组即可访问 lh-1 的 22 端口
nebula-cert sign -name "laptop" -ip "192.168.100.2/24" -groups "laptop,home,ssh"
cat <<LH > laptop.yaml
pki:
ca: ca.crt
cert: laptop.crt
key: laptop.key
static_host_map:
"192.168.100.1": ["100.64.22.11:4242"]
lighthouse:
hosts:
- "192.168.100.1"
listen:
host: 0.0.0.0
port: 4242
firewall:
outbound:
- port: any
proto: any
host: any
inbound:
- port: any
proto: icmp
host: any
LH
sudo nebula -config laptop.yaml

配置#

# This is the nebula example configuration file. You must edit, at a minimum, the static_host_map, lighthouse, and firewall sections
# Some options in this file are HUPable, including the pki section. (A HUP will reload credentials from disk without affecting existing tunnels)
# PKI defines the location of credentials for this node. Each of these can also be inlined by using the yaml ": |" syntax.
pki:
# The CAs that are accepted by this node. Must contain one or more certificates created by 'nebula-cert ca'
ca: /etc/nebula/ca.crt
cert: /etc/nebula/host.crt
key: /etc/nebula/host.key
#blocklist is a list of certificate fingerprints that we will refuse to talk to
#blocklist:
# - c99d4e650533b92061b09918e838a5a0a6aaee21eed1d12fd937682865936c72
# The static host map defines a set of hosts with fixed IP addresses on the internet (or any network).
# A host can have multiple fixed IP addresses defined here, and nebula will try each when establishing a tunnel.
# The syntax is:
# "{nebula ip}": ["{routable ip/dns name}:{routable port}"]
# Example, if your lighthouse has the nebula IP of 192.168.100.1 and has the real ip address of 100.64.22.11 and runs on port 4242:
static_host_map:
"192.168.100.1": ["100.64.22.11:4242"]
lighthouse:
# am_lighthouse is used to enable lighthouse functionality for a node. This should ONLY be true on nodes
# you have configured to be lighthouses in your network
am_lighthouse: false
# serve_dns optionally starts a dns listener that responds to various queries and can even be
# delegated to for resolution
#serve_dns: false
#dns:
# The DNS host defines the IP to bind the dns listener to. This also allows binding to the nebula node IP.
#host: 0.0.0.0
#port: 53
# interval is the number of seconds between updates from this node to a lighthouse.
# during updates, a node sends information about its current IP addresses to each node.
interval: 60
# hosts is a list of lighthouse hosts this node should report to and query from
# IMPORTANT: THIS SHOULD BE EMPTY ON LIGHTHOUSE NODES
# IMPORTANT2: THIS SHOULD BE LIGHTHOUSES' NEBULA IPs, NOT LIGHTHOUSES' REAL ROUTABLE IPs
hosts:
- "192.168.100.1"
# remote_allow_list allows you to control ip ranges that this node will
# consider when handshaking to another node. By default, any remote IPs are
# allowed. You can provide CIDRs here with `true` to allow and `false` to
# deny. The most specific CIDR rule applies to each remote. If all rules are
# "allow", the default will be "deny", and vice-versa. If both "allow" and
# "deny" rules are present, then you MUST set a rule for "0.0.0.0/0" as the
# default.
#remote_allow_list:
# Example to block IPs from this subnet from being used for remote IPs.
#"172.16.0.0/12": false
# A more complicated example, allow public IPs but only private IPs from a specific subnet
#"0.0.0.0/0": true
#"10.0.0.0/8": false
#"10.42.42.0/24": true
# local_allow_list allows you to filter which local IP addresses we advertise
# to the lighthouses. This uses the same logic as `remote_allow_list`, but
# additionally, you can specify an `interfaces` map of regular expressions
# to match against interface names. The regexp must match the entire name.
# All interface rules must be either true or false (and the default will be
# the inverse). CIDR rules are matched after interface name rules.
# Default is all local IP addresses.
#local_allow_list:
# Example to block tun0 and all docker interfaces.
#interfaces:
#tun0: false
#'docker.*': false
# Example to only advertise this subnet to the lighthouse.
#"10.0.0.0/8": true
# Port Nebula will be listening on. The default here is 4242. For a lighthouse node, the port should be defined,
# however using port 0 will dynamically assign a port and is recommended for roaming nodes.
listen:
# To listen on both any ipv4 and ipv6 use "[::]"
host: 0.0.0.0
port: 4242
# Sets the max number of packets to pull from the kernel for each syscall (under systems that support recvmmsg)
# default is 64, does not support reload
#batch: 64
# Configure socket buffers for the udp side (outside), leave unset to use the system defaults. Values will be doubled by the kernel
# Default is net.core.rmem_default and net.core.wmem_default (/proc/sys/net/core/rmem_default and /proc/sys/net/core/rmem_default)
# Maximum is limited by memory in the system, SO_RCVBUFFORCE and SO_SNDBUFFORCE is used to avoid having to raise the system wide
# max, net.core.rmem_max and net.core.wmem_max
#read_buffer: 10485760
#write_buffer: 10485760
# EXPERIMENTAL: This option is currently only supported on linux and may
# change in future minor releases.
#
# Routines is the number of thread pairs to run that consume from the tun and UDP queues.
# Currently, this defaults to 1 which means we have 1 tun queue reader and 1
# UDP queue reader. Setting this above one will set IFF_MULTI_QUEUE on the tun
# device and SO_REUSEPORT on the UDP socket to allow multiple queues.
#routines: 1
punchy:
# Continues to punch inbound/outbound at a regular interval to avoid expiration of firewall nat mappings
punch: true
# respond means that a node you are trying to reach will connect back out to you if your hole punching fails
# this is extremely useful if one node is behind a difficult nat, such as a symmetric NAT
# Default is false
#respond: true
# delays a punch response for misbehaving NATs, default is 1 second, respond must be true to take effect
#delay: 1s
# Cipher allows you to choose between the available ciphers for your network. Options are chachapoly or aes
# IMPORTANT: this value must be identical on ALL NODES/LIGHTHOUSES. We do not/will not support use of different ciphers simultaneously!
#cipher: chachapoly
# Local range is used to define a hint about the local network range, which speeds up discovering the fastest
# path to a network adjacent nebula node.
#local_range: "172.16.0.0/24"
# sshd can expose informational and administrative functions via ssh this is a
#sshd:
# Toggles the feature
#enabled: true
# Host and port to listen on, port 22 is not allowed for your safety
#listen: 127.0.0.1:2222
# A file containing the ssh host private key to use
# A decent way to generate one: ssh-keygen -t ed25519 -f ssh_host_ed25519_key -N "" < /dev/null
#host_key: ./ssh_host_ed25519_key
# A file containing a list of authorized public keys
#authorized_users:
#- user: steeeeve
# keys can be an array of strings or single string
#keys:
#- "ssh public key string"
# Configure the private interface. Note: addr is baked into the nebula certificate
tun:
# When tun is disabled, a lighthouse can be started without a local tun interface (and therefore without root)
disabled: false
# Name of the device
dev: nebula1
# Toggles forwarding of local broadcast packets, the address of which depends on the ip/mask encoded in pki.cert
drop_local_broadcast: false
# Toggles forwarding of multicast packets
drop_multicast: false
# Sets the transmit queue length, if you notice lots of transmit drops on the tun it may help to raise this number. Default is 500
tx_queue: 500
# Default MTU for every packet, safe setting is (and the default) 1300 for internet based traffic
mtu: 1300
# Route based MTU overrides, you have known vpn ip paths that can support larger MTUs you can increase/decrease them here
routes:
#- mtu: 8800
# route: 10.0.0.0/16
# Unsafe routes allows you to route traffic over nebula to non-nebula nodes
# Unsafe routes should be avoided unless you have hosts/services that cannot run nebula
# NOTE: The nebula certificate of the "via" node *MUST* have the "route" defined as a subnet in its certificate
unsafe_routes:
#- route: 172.16.1.0/24
# via: 192.168.100.99
# mtu: 1300 #mtu will default to tun mtu if this option is not sepcified
# TODO
# Configure logging level
logging:
# panic, fatal, error, warning, info, or debug. Default is info
level: info
# json or text formats currently available. Default is text
format: text
# Disable timestamp logging. useful when output is redirected to logging system that already adds timestamps. Default is false
#disable_timestamp: true
# timestamp format is specified in Go time format, see:
# https://golang.org/pkg/time/#pkg-constants
# default when `format: json`: "2006-01-02T15:04:05Z07:00" (RFC3339)
# default when `format: text`:
# when TTY attached: seconds since beginning of execution
# otherwise: "2006-01-02T15:04:05Z07:00" (RFC3339)
# As an example, to log as RFC3339 with millisecond precision, set to:
#timestamp_format: "2006-01-02T15:04:05.000Z07:00"
#stats:
#type: graphite
#prefix: nebula
#protocol: tcp
#host: 127.0.0.1:9999
#interval: 10s
#type: prometheus
#listen: 127.0.0.1:8080
#path: /metrics
#namespace: prometheusns
#subsystem: nebula
#interval: 10s
# enables counter metrics for meta packets
# e.g.: `messages.tx.handshake`
# NOTE: `message.{tx,rx}.recv_error` is always emitted
#message_metrics: false
# enables detailed counter metrics for lighthouse packets
# e.g.: `lighthouse.rx.HostQuery`
#lighthouse_metrics: false
# Handshake Manger Settings
#handshakes:
# Total time to try a handshake = sequence of `try_interval * retries`
# With 100ms interval and 20 retries it is 23.5 seconds
#try_interval: 100ms
#retries: 20
# wait_rotation is the number of handshake attempts to do before starting to try non-local IP addresses
#wait_rotation: 5
# trigger_buffer is the size of the buffer channel for quickly sending handshakes
# after receiving the response for lighthouse queries
#trigger_buffer: 64
# 防火墙安全配置
# 进出规则默认 deny - 所有配置都是配置允许
# 匹配逻辑 port AND proto AND (ca_sha OR ca_name) AND (host OR group OR groups OR cidr)
firewall:
conntrack:
tcp_timeout: 12m
udp_timeout: 3m
default_timeout: 10m
max_connections: 100000
outbound:
# 允许所有出去流量
- port: any
proto: any
host: any
# 0, any, 80, 1000-200, fragment
- port: any
# 类似 port 但在 ICMP 这样的协议中使用 code 更合理 - 目前未实现
code: any
# tcp, udp, icmp
proto: any
# 主机名 - test-host
host: any
# 在证书中包含的分组
group: any
# 等同于 group, 但支持多个值, 要求都匹配
groups: []
# 地址限定
cidr: 0.0.0.0/0
# ca_name: An issuing CA name
# ca_sha: An issuing CA shasum
inbound:
# 允许 ICMP - 能 Ping
- port: any
proto: icmp
host: any
# Allow tcp/443 from any host with BOTH laptop and home group
- port: 443
proto: tcp
groups:
- laptop
- home