我正在尝试将通过以太网连接的 debian bullseye 台式机设置为 wifi 接入点。我想使用我的 ISP 路由器（freebox delta，FWIW）DHCP 东西。我已经按照说明在运行 LibreELEC 的 raspberry pi 4 上成功完成了同样的事情这里，但 libreelec 不使用网络管理器。由于我对网络方面的东西相当无知，所以我无法使用网络管理器重现类似的设置。
我发现了类似的问题这里，但说明相当少。我设法让它在 IPv6 上工作，但出于某种原因，我的 Android 手机没有 IPv4（我需要它）。
我正在使用nmtui并且以下是我所做的：
┌───────────────────────────┤ Edit Connection ├───────────────────────────┐
│ │
│ Profile name ethernet-wifi-bridge____________________ │
│ Device nm-bridge_______________________________ │
│ │
│ + BRIDGE <Hide> │
│ | Slaves │
│ | ┌───────────────────────────────────────────────┐ │
│ | │ Connexion Wi-Fi 1 ↑ │ <Add> │
│ | │ Connexion Ethernet 1 ▒ │ │
│ | │ █ │ <Edit...> │
│ | │ ▒ │ │
│ | │ ▒ │ <Delete> │
│ | │ ↓ │ │
│ | └───────────────────────────────────────────────┘ │
│ | Aging time 300_______ seconds │
│ | [X] Enable IGMP snooping │
│ | [X] Enable STP (Spanning Tree Protocol) │
│ | Priority 32768_____ │
│ | Forward delay 15________ seconds │
│ | Hello time 2_________ seconds │
│ | Max age 20________ seconds │
│ | Group forward mask 0_________ │
│ \ │
│ │
│ + IPv4 CONFIGURATION <Manual> <Hide> │
│ | Addresses 192.168.1.141/24_________ <Remove> │
│ | <Add...> │
│ | Gateway 192.168.1.254____________ │
│ | DNS servers 80.67.169.12_____________ <Remove> │
│ | 80.67.169.40_____________ <Remove> │
│ | <Add...> │
│ | Search domains <Add...> │
│ | │
│ | Routing (No custom routes) <Edit...> │
│ | [ ] Never use this network for default route │
│ | [ ] Ignore automatically obtained routes │
│ | [ ] Ignore automatically obtained DNS parameters │
│ | │
│ | [ ] Require IPv4 addressing for this connection │
│ \ │
│ │
│ - IPv6 CONFIGURATION <Automatic> <Show> │
│ │
│ [X] Automatically connect │
│ [X] Available to all users │
│ │
│ <Cancel> <OK> │
└─────────────────────────────────────────────────────────────────────────┘
（我手动设置了 IPv4 地址和网关，因为运行 libreELEC 的 Pi 上需要这个，但我也尝试过自动设置，但效果并没有好转）。
┌─┌─────────────────────────┤ Edit Connection ├──────────────────────────┐┐
│ │ │
│ │ Profile name Connexion Wi-Fi 1_______________________ │
│ │ Device wlp4s0 (B0:A4:60:FB:70:6B)______________ │
│ │ │
│ │ + WI-FI <Hide> │
│ │ | SSID caradubouchik___________________________ │
│ │ | Mode <Access Point> │
│ │ | Channel <Automatic> │
│ │ | │
│ │ | Security <WPA & WPA2 Personal> │
│ │ | Password ________________________________________ │
│ │ | [ ] Show password │
│ │ | │
│ │ | BSSID ________________________________________ │
│ │ | Cloned MAC address ________________________________________ │
│ │ | MTU __________ (default) │
│ │ \ │
│ │ │
│ │ + BRIDGE PORT <Hide> │
│ │ | Priority 32________ │
│ │ | Path cost 100_______ │
│ │ | [ ] Hairpin mode │
│ │ \ │
│ │ [X] Automatically connect │
│ │ [X] Available to all users │
│ │ │
│ │ <Cancel> <OK> │
└─└──────────────────────────────────────────────────────────────────────┘
（密码是隐藏的，但我设置了一个）
┌─┌─────────────────────────┤ Edit Connection ├──────────────────────────┐┐
│ │ │
│ │ Profile name Connexion Ethernet 1____________________ │
│ │ Device enp5s0 (A8:A1:59:66:94:3E)______________ │
│ │ │
│ │ - ETHERNET <Show> │
│ │ │
│ │ + BRIDGE PORT <Hide> │
│ │ | Priority 32________ │
│ │ | Path cost 100_______ │
│ │ | [ ] Hairpin mode │
│ │ \ │
│ │ [X] Automatically connect │
│ │ [X] Available to all users │
│ │ │
│ │ <Cancel> <OK> │
└─└──────────────────────────────────────────────────────────────────────┘
这是nmcli输出：
nm-bridge: connecté à ethernet-wifi-bridge
"nm-bridge"
bridge, 6A:D1:FD:B4:58:75, sw, mtu 1500
ip4 par défaut, ip6 par défaut
inet4 192.168.1.141/24
route4 192.168.1.0/24
route4 0.0.0.0/0
inet6 2a01:e0a:a57:a150:59e7:1659:650b:928c/64
inet6 fe80::75d6:ad05:8657:f3b0/64
route6 2a01:e0a:a57:a150::/64
route6 ::/0
route6 fe80::/64
enp5s0: connecté à Connexion Ethernet 1
"Realtek Matisse GPP Bridge"
ethernet (r8169), A8:A1:59:66:94:3E, hw, mtu 1500
master nm-bridge
wlp4s0: connecté à Connexion Wi-Fi 1
"Intel 6 AX200"
wifi (iwlwifi), B0:A4:60:FB:70:6B, hw, mtu 1500
master nm-bridge
DNS configuration:
servers: 80.67.169.12 80.67.169.40
interface: nm-bridge
servers: 2001:910:800::12 2001:910:800::40
interface: nm-bridge
以下是我的 Android 设备显示的内容：
为什么我的 Android 手机没有 IPv4？我猜是 nmtui 的复选框和/或文本字段出了问题，但我不知道是哪一个。谢谢您的帮助！
编辑：感谢@user1686，我将问题标题改为更具体的内容。因此，网桥不会将 BOOTP/DHCP 请求从 wifi 传输到以太网设备，这由以下人员证明：
~> sudo tcpdump -n -e -i wlp4s0 | grep DHCP
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on wlp4s0, link-type EN10MB (Ethernet), snapshot length 262144 bytes
08:43:53.751959 a0:78:17:7f:86:71 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 342: 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from a0:78:17:7f:86:71, length 300
08:43:53.751971 a0:78:17:7f:86:71 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 342: 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from a0:78:17:7f:86:71, length 300
[...]
# simultaneously:
~> sudo tcpdump -n -e -i enp5s0 | grep DHCP
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on enp5s0, link-type EN10MB (Ethernet), snapshot length 262144 bytes
[nothing]
ip addr也许和中有些东西可看route -n？这是 Raspberry Pi 上的输出，其中桥正确地将 DHCP 请求从 wifi 传输到以太网，供参考：
rasptv:~ # ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP8000> mtu 1500 qdisc mq master br0 qlen 1000
link/ether dc:a6:32:59:0b:9a brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP8000> mtu 1500 qdisc fq_codel master br0 qlen 1000
link/ether dc:a6:32:59:0b:9c brd ff:ff:ff:ff:ff:ff
inet6 fe80::dea6:32ff:fe59:b9c/64 scope link
valid_lft forever preferred_lft forever
6: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue qlen 1000
link/ether dc:a6:32:59:0b:9a brd ff:ff:ff:ff:ff:ff
inet 192.168.1.104/24 brd 192.168.1.255 scope global br0
valid_lft forever preferred_lft forever
inet6 2a01:e0a:a57:a150:dea6:32ff:fe59:b9a/64 scope global dynamic
valid_lft 86278sec preferred_lft 86278sec
inet6 fe80::64b2:93ff:fe03:c901/64 scope link
valid_lft forever preferred_lft forever
7: tether: <BROADCAST,MULTICAST,UP,LOWER_UP8000> mtu 1500 qdisc noqueue qlen 1000
link/ether ae:5e:80:f9:59:f1 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.1/24 brd 192.168.0.255 scope global tether
valid_lft forever preferred_lft forever
inet6 fe80::ac5e:80ff:fef9:59f1/64 scope link
valid_lft forever preferred_lft forever
rasptv:~ # route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.254 0.0.0.0 UG 0 0 0 br0
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 tether
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 br0
这是在非 DHCP 传输机器上的情况：
~> sudo ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master nm-bridge state UP group default qlen 1000
link/ether a8:a1:59:66:94:3e brd ff:ff:ff:ff:ff:ff
3: wlp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master nm-bridge state UP group default qlen 1000
link/ether b0:a4:60:fb:70:6b brd ff:ff:ff:ff:ff:ff
4: nm-bridge: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 6a:d1:fd:b4:58:75 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.141/24 brd 192.168.1.255 scope global noprefixroute nm-bridge
valid_lft forever preferred_lft forever
inet6 2a01:e0a:a57:a150:59e7:1659:650b:928c/64 scope global dynamic noprefixroute
valid_lft 86360sec preferred_lft 86360sec
inet6 fe80::75d6:ad05:8657:f3b0/64 scope link noprefixroute
valid_lft forever preferred_lft forever
5: br-61d11f468acb: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:0d:6a:ed:12 brd ff:ff:ff:ff:ff:ff
inet 172.18.0.1/16 brd 172.18.255.255 scope global br-61d11f468acb
valid_lft forever preferred_lft forever
6: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:c9:d9:55:1d brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
valid_lft forever preferred_lft forever
7: br-feed140e8225: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:00:ed:09:58 brd ff:ff:ff:ff:ff:ff
inet 172.21.0.1/16 brd 172.21.255.255 scope global br-feed140e8225
valid_lft forever preferred_lft forever
~> sudo route -n
Table de routage IP du noyau
Destination Passerelle Genmask Indic Metric Ref Use Iface
0.0.0.0 192.168.1.254 0.0.0.0 UG 425 0 0 nm-bridge
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
172.18.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-61d11f468acb
172.21.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-feed140e8225
192.168.1.0 0.0.0.0 255.255.255.0 U 425 0 0 nm-bridge
Docker 已安装在这里，但我认为它与此问题无关，是吗？我需要设置此tether接口吗？任何帮助表示感谢！
答案1
感谢 r/techsupport subreddit 的 discord 频道，我通过添加重启持久 iptables 规则实现了此功能。
> cat /etc/NetworkManager/dispatcher.d/99-bridge
#!/bin/sh
INTERFACE=$1
ACTION=$2
if [ "$INTERFACE" = "nm-bridge" ]; then
if [ "$ACTION" = "up" ]; then
iptables -A FORWARD -i nm-bridge -j ACCEPT
fi
fi