@slrey 哎，等等。。。 我确实插了一个 xbox 无线接收器。

@choury

https://i.miji.bid/2023/08/08/2514a2afa78d0f2a8c524b53482698b4.png

ls /sys/class/net/wlp0s20f0u1/ -lh
总计 0
-r--r--r-- 1 root root 4.0K 8 月 8 日 14:09 addr_assign_type
-r--r--r-- 1 root root 4.0K 8 月 8 日 14:09 address
-r--r--r-- 1 root root 4.0K 8 月 8 日 17:26 addr_len
-r--r--r-- 1 root root 4.0K 8 月 8 日 17:26 broadcast
-rw-r--r-- 1 root root 4.0K 8 月 8 日 17:26 carrier
-r--r--r-- 1 root root 4.0K 8 月 8 日 17:26 carrier_changes
-r--r--r-- 1 root root 4.0K 8 月 8 日 17:26 carrier_down_count
-r--r--r-- 1 root root 4.0K 8 月 8 日 17:26 carrier_up_count
lrwxrwxrwx 1 root root 0 8 月 8 日 14:09 device -> ../../../1-1:1.0
-r--r--r-- 1 root root 4.0K 8 月 8 日 14:09 dev_id
-r--r--r-- 1 root root 4.0K 8 月 8 日 14:09 dev_port
-r--r--r-- 1 root root 4.0K 8 月 8 日 17:26 dormant
-r--r--r-- 1 root root 4.0K 8 月 8 日 17:26 duplex
-rw-r--r-- 1 root root 4.0K 8 月 8 日 17:26 flags
-rw-r--r-- 1 root root 4.0K 8 月 8 日 17:26 gro_flush_timeout
-rw-r--r-- 1 root root 4.0K 8 月 8 日 17:26 ifalias
-r--r--r-- 1 root root 4.0K 8 月 8 日 14:09 ifindex
-r--r--r-- 1 root root 4.0K 8 月 8 日 14:09 iflink
-r--r--r-- 1 root root 4.0K 8 月 8 日 17:26 link_mode
-rw-r--r-- 1 root root 4.0K 8 月 8 日 17:26 mtu
-r--r--r-- 1 root root 4.0K 8 月 8 日 14:09 name_assign_type
-rw-r--r-- 1 root root 4.0K 8 月 8 日 17:26 napi_defer_hard_irqs
-rw-r--r-- 1 root root 4.0K 8 月 8 日 17:26 netdev_group
-r--r--r-- 1 root root 4.0K 8 月 8 日 17:26 operstate
lrwxrwxrwx 1 root root 0 8 月 8 日 14:09 phy80211 -> ../../ieee80211/phy0
-r--r--r-- 1 root root 4.0K 8 月 8 日 14:09 phys_port_id
-r--r--r-- 1 root root 4.0K 8 月 8 日 14:09 phys_port_name
-r--r--r-- 1 root root 4.0K 8 月 8 日 17:26 phys_switch_id
drwxr-xr-x 2 root root 0 8 月 8 日 16:36 power
-rw-r--r-- 1 root root 4.0K 8 月 8 日 17:26 proto_down
drwxr-xr-x 4 root root 0 8 月 8 日 16:36 queues
-r--r--r-- 1 root root 4.0K 8 月 8 日 14:12 speed
drwxr-xr-x 2 root root 0 8 月 8 日 16:36 statistics
lrwxrwxrwx 1 root root 0 8 月 8 日 14:09 subsystem -> ../../../../../../../../class/net
-r--r--r-- 1 root root 4.0K 8 月 8 日 17:26 testing
-rw-r--r-- 1 root root 4.0K 8 月 8 日 17:26 threaded
-rw-r--r-- 1 root root 4.0K 8 月 8 日 17:26 tx_queue_len
-r--r--r-- 1 root root 4.0K 8 月 8 日 14:09 type
-rw-r--r-- 1 root root 4.0K 8 月 8 日 14:09 uevent
drwxr-xr-x 2 root root 0 8 月 8 日 14:12 wireless

～～～～～～～～～～～～～～～～～～～～～～～

ls /sys/class/net/wlp0s20f0u1/device/ -lh

-rw-r--r-- 1 root root 4.0K 8 月 8 日 17:26 authorized
-r--r--r-- 1 root root 4.0K 8 月 8 日 17:26 bAlternateSetting
-r--r--r-- 1 root root 4.0K 8 月 8 日 14:09 bInterfaceClass
-r--r--r-- 1 root root 4.0K 8 月 8 日 14:09 bInterfaceNumber
-r--r--r-- 1 root root 4.0K 8 月 8 日 17:26 bInterfaceProtocol
-r--r--r-- 1 root root 4.0K 8 月 8 日 17:26 bInterfaceSubClass
-r--r--r-- 1 root root 4.0K 8 月 8 日 14:09 bNumEndpoints
lrwxrwxrwx 1 root root 0 8 月 8 日 14:09 driver -> ../../../../../../bus/usb/drivers/mt76x2u
drwxr-xr-x 3 root root 0 8 月 8 日 16:36 ep_04
drwxr-xr-x 3 root root 0 8 月 8 日 16:36 ep_05
drwxr-xr-x 3 root root 0 8 月 8 日 16:36 ep_06
drwxr-xr-x 3 root root 0 8 月 8 日 16:36 ep_07
drwxr-xr-x 3 root root 0 8 月 8 日 16:36 ep_08
drwxr-xr-x 3 root root 0 8 月 8 日 16:36 ep_09
drwxr-xr-x 3 root root 0 8 月 8 日 16:36 ep_84
drwxr-xr-x 3 root root 0 8 月 8 日 16:36 ep_85
lrwxrwxrwx 1 root root 0 8 月 8 日 17:26 firmware_node -> ../../../../../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:4c/device:4d/device:4e
drwxr-xr-x 3 root root 0 8 月 8 日 14:09 ieee80211
-r--r--r-- 1 root root 4.0K 8 月 8 日 17:26 interface
-r--r--r-- 1 root root 4.0K 8 月 8 日 17:26 modalias
drwxr-xr-x 3 root root 0 8 月 8 日 14:09 net
drwxr-xr-x 2 root root 0 8 月 8 日 16:36 physical_location
drwxr-xr-x 2 root root 0 8 月 8 日 16:36 power
lrwxrwxrwx 1 root root 0 8 月 8 日 14:09 subsystem -> ../../../../../../bus/usb
-r--r--r-- 1 root root 4.0K 8 月 8 日 17:26 supports_autosuspend
-rw-r--r-- 1 root root 4.0K 8 月 8 日 14:09 uevent


@NessajCN

sudo lspci -k

0:00.0 Host bridge: Intel Corporation 8th Gen Core Processor Host Bridge/DRAM Registers (rev 07)
DeviceName: Onboard - Other
Subsystem: Micro-Star International Co., Ltd. [MSI] 8th Gen Core Processor Host Bridge/DRAM Registers
Kernel driver in use: skl_uncore
lspci: Unable to load libkmod resources: error -2
00:01.0 PCI bridge: Intel Corporation 6th-10th Gen Core Processor PCIe Controller (x16) (rev 07)
Subsystem: Micro-Star International Co., Ltd. [MSI] 6th-10th Gen Core Processor PCIe Controller (x16)
Kernel driver in use: pcieport
00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
DeviceName: Onboard - Other
Subsystem: Micro-Star International Co., Ltd. [MSI] Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
00:12.0 Signal processing controller: Intel Corporation Cannon Lake PCH Thermal Controller (rev 10)
DeviceName: Onboard - Other
Subsystem: Micro-Star International Co., Ltd. [MSI] Cannon Lake PCH Thermal Controller
Kernel driver in use: intel_pch_thermal
00:14.0 USB controller: Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host Controller (rev 10)
DeviceName: Onboard - Other
Subsystem: Micro-Star International Co., Ltd. [MSI] Cannon Lake PCH USB 3.1 xHCI Host Controller
Kernel driver in use: xhci_hcd
00:14.2 RAM memory: Intel Corporation Cannon Lake PCH Shared SRAM (rev 10)
DeviceName: Onboard - Other
Subsystem: Intel Corporation Cannon Lake PCH Shared SRAM
00:16.0 Communication controller: Intel Corporation Cannon Lake PCH HECI Controller (rev 10)
DeviceName: Onboard - Other
Subsystem: Micro-Star International Co., Ltd. [MSI] Cannon Lake PCH HECI Controller
Kernel driver in use: mei_me
00:17.0 SATA controller: Intel Corporation Cannon Lake PCH SATA AHCI Controller (rev 10)
DeviceName: Onboard - SATA
Subsystem: Micro-Star International Co., Ltd. [MSI] Cannon Lake PCH SATA AHCI Controller
Kernel driver in use: ahci
00:1b.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #21 (rev f0)
Subsystem: Intel Corporation Cannon Lake PCH PCI Express Root Port
Kernel driver in use: pcieport
00:1d.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #9 (rev f0)
Subsystem: Micro-Star International Co., Ltd. [MSI] Cannon Lake PCH PCI Express Root Port
Kernel driver in use: pcieport
00:1f.0 ISA bridge: Intel Corporation Device a308 (rev 10)
DeviceName: Onboard - Other
Subsystem: Micro-Star International Co., Ltd. [MSI] Device 7b23
00:1f.3 Audio device: Intel Corporation Cannon Lake PCH cAVS (rev 10)
DeviceName: Onboard - Sound
Subsystem: Micro-Star International Co., Ltd. [MSI] Cannon Lake PCH cAVS
Kernel driver in use: snd_hda_intel
00:1f.4 SMBus: Intel Corporation Cannon Lake PCH SMBus Controller (rev 10)
DeviceName: Onboard - Other
Subsystem: Micro-Star International Co., Ltd. [MSI] Cannon Lake PCH SMBus Controller
Kernel driver in use: i801_smbus
00:1f.5 Serial bus controller: Intel Corporation Cannon Lake PCH SPI Controller (rev 10)
DeviceName: Onboard - Other
Subsystem: Micro-Star International Co., Ltd. [MSI] Cannon Lake PCH SPI Controller
Kernel driver in use: intel-spi
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (7) I219-V (rev 10)
DeviceName: Onboard - Ethernet
Subsystem: Micro-Star International Co., Ltd. [MSI] Ethernet Connection (7) I219-V
Kernel driver in use: e1000e
01:00.0 VGA compatible controller: NVIDIA Corporation GA104 [GeForce RTX 3070 Ti] (rev a1)
Subsystem: Micro-Star International Co., Ltd. [MSI] GA104 [GeForce RTX 3070 Ti]
Kernel driver in use: nvidia
01:00.1 Audio device: NVIDIA Corporation GA104 High Definition Audio Controller (rev a1)
Subsystem: Micro-Star International Co., Ltd. [MSI] GA104 High Definition Audio Controller
Kernel driver in use: snd_hda_intel
02:00.0 Non-Volatile memory controller: MAXIO Technology (Hangzhou) Ltd. NVMe SSD Controller MAP1001 (rev 01)
Subsystem: MAXIO Technology (Hangzhou) Ltd. NVMe SSD Controller MAP1001
Kernel driver in use: nvme
03:00.0 Non-Volatile memory controller: INNOGRIT Corporation Device 5216 (rev 01)
Subsystem: INNOGRIT Corporation Device 5216
Kernel driver in use: nvme

我查了 intel 规格，没说支持有线呐： https://www.intel.cn/content/www/cn/zh/products/sku/82186/intel-ethernet-connection-i219v/specifications.html

我真的纳闷。

@ho121 可是，别的操作系统都不支持无线？

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 noprefixroute
valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:d8:61:8b:2a:e9 brd ff:ff:ff:ff:ff:ff
altname enp0s31f6
inet 192.168.2.10/24 brd 192.168.2.255 scope global noprefixroute eno1
valid_lft forever preferred_lft forever
inet6 fe80::bf6b:bced:af2f:4913/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: wlp0s20f0u1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether fa:36:46:25:21:23 brd ff:ff:ff:ff:ff:ff permaddr 6c:5d:3a:10:89:15


～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～

sudo lspci


00:00.0 Host bridge: Intel Corporation 8th Gen Core Processor Host Bridge/DRAM Registers (rev 07)
00:01.0 PCI bridge: Intel Corporation 6th-10th Gen Core Processor PCIe Controller (x16) (rev 07)
00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
00:12.0 Signal processing controller: Intel Corporation Cannon Lake PCH Thermal Controller (rev 10)
00:14.0 USB controller: Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host Controller (rev 10)
00:14.2 RAM memory: Intel Corporation Cannon Lake PCH Shared SRAM (rev 10)
00:16.0 Communication controller: Intel Corporation Cannon Lake PCH HECI Controller (rev 10)
00:17.0 SATA controller: Intel Corporation Cannon Lake PCH SATA AHCI Controller (rev 10)
00:1b.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #21 (rev f0)
00:1d.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #9 (rev f0)
00:1f.0 ISA bridge: Intel Corporation Device a308 (rev 10)
00:1f.3 Audio device: Intel Corporation Cannon Lake PCH cAVS (rev 10)
00:1f.4 SMBus: Intel Corporation Cannon Lake PCH SMBus Controller (rev 10)
00:1f.5 Serial bus controller: Intel Corporation Cannon Lake PCH SPI Controller (rev 10)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (7) I219-V (rev 10)
01:00.0 VGA compatible controller: NVIDIA Corporation GA104 [GeForce RTX 3070 Ti] (rev a1)
01:00.1 Audio device: NVIDIA Corporation GA104 High Definition Audio Controller (rev a1)
02:00.0 Non-Volatile memory controller: MAXIO Technology (Hangzhou) Ltd. NVMe SSD Controller MAP1001 (rev 01)
03:00.0 Non-Volatile memory controller: INNOGRIT Corporation Device 5216 (rev 01)

你一个编程的，居然依赖这些软件，我真是搞不懂为什么。

@huangya 太感谢了! 搞懂了，谢谢。

@huangya 真的可以了，问题解决。原因应该是跟前面的猜测一致，但是我想请教下，现在的规则是这样的：
iptables -t nat -A PREROUTING -p udp --dport 53 -j REDIRECT --to-ports 53
iptables -t nat -A PREROUTING -p tcp --dport 53 -j REDIRECT --to-ports 53
iptables -t nat -I POSTROUTING -j MASQUERADE
iptables -t nat -I POSTROUTING 1 -d 10.8.0.0/24 -j ACCEPT


就是说，发送到 10.8.0.0/24 的包采用的动作是 ACCEPT，但是这里并没有 return，为何就可以产生效果呢？
iptables 规则的匹配不是从前到后依次匹配，除非无法匹配，或者 return 才会终止匹配后面的规则。

这个地方，ACCEPT 后，并没有 return，那不是最后还是会匹配到 MASQUERADE 上去，导致数据包源地址发生改变？

@huangya 很感谢。PC 上设置静态路由可以解决问题。 但是路由器上设置 iptables 规则没什么效果。 抓包我也抓了下，但是水平有限研究不出来啥。

@huangya 嗯嗯，我抓包看看。

或许如 @Jirajine 所说，去掉 MASQ 就可以了，但是去掉 MASQ 似乎会导致数据包在 192.168.2.2 上循环导致无法正常上网了。

@jasonyang9 我也有这种猜测，但是不知道怎么处理。 @huangya 的办法不错，我试试看应该能解决问题。

但是如果能够在路由器上解决问题就更好了，那样就不用在 PC 上单独配置。

@huangya 谢谢我试试看。

@huangya vpn client 的虚拟网卡网段是：10.8.0.0/24

@Jirajine 去掉的话无法正常上网了，

@Jirajine ？ 我感觉线路很清晰啊，哪里乱了。