felix0012

@cnt2ex 完全一样的场景。我用脚本定时自动调用 gnupg 加密备份数据压缩包然后上传网盘。gnupg 的私钥就用的一楼提到的 paperbak 打印出来几份分散存放。

有一次试着恢复过，手机拍照然后用 paperbak 识别，很顺利。

每个月 5000 工资不够花。为啥后面多一个 0 就够了呢～ 🐶

@wu67 如果做过嵌入式的开发大概就知道了。要调用或操作一个设备或者资源，总要有个指针指向它，这个指针就是句柄

@4Qd5zQCm26
银行卡 App 账单流水可以导出 Excel

用的哪家银行卡？
好像中行、招行都只能导出 PDF ，还很难用工具分析。

单纯就是年纪大了吧，我也有同感。
现在晚上周末到了家大部分时间都在陪娃，然后发现小孩子真的非常容易快乐。有时候听到别人口误都能大笑半天。顺带的自己也觉得开心起来

一贴文字，缩进格式全没了……

Openwrt 路由器的 Advertise

DHCPv6
____Message_type:_Advertise_(2)
____Transaction_ID:_0x19f696
____Server_Identifier
________Option:_Server_Identifier_(2)
________Length:_10
________DUID:_0003000120769300a03c
________DUID_Type:_link-layer_address_(3)
________Hardware_type:_Ethernet_(1)
________Link-layer_address:_xxx
________Link-layer_address_(Ethernet):_xxx
____Client_Identifier
________Option:_Client_Identifier_(1)
________Length:_14
________DUID:_000100012b3dd50b507b9d730987
________DUID_Type:_link-layer_address_plus_time_(1)
________Hardware_type:_Ethernet_(1)
________DUID_Time:_Dec_28,_2022_00:08:43.000000000_中国标准时间
________Link-layer_address:_xxx
________Link-layer_address_(Ethernet):_xxx
____SOL_MAX_RT
________Option:_SOL_MAX_RT_(82)
________Length:_4
____DNS_recursive_name_server
________Option:_DNS_recursive_name_server_(23)
________Length:_16
_________1_DNS_server_address:_fd5c:1e:6cb0::1
____Identity_Association_for_Non-temporary_Address
________Option:_Identity_Association_for_Non-temporary_Address_(3)
________Length:_40
________IAID:_03e09467
________T1:_21600
________T2:_34560
________IA_Address
____________Option:_IA_Address_(5)
____________Length:_24
____________IPv6_address:_fd5c:1e:6cb0::7e8
____________Preferred_lifetime:_43200
____________Valid_lifetime:_43200


光猫的 Advertise

DHCPv6
____Message_type:_Advertise_(2)
____Transaction_ID:_0x19f696
____Client_Identifier
________Option:_Client_Identifier_(1)
________Length:_14
________DUID:_000100012b3dd50b507b9d730987
________DUID_Type:_link-layer_address_plus_time_(1)
________Hardware_type:_Ethernet_(1)
________DUID_Time:_Dec_28,_2022_00:08:43.000000000_中国标准时间
________Link-layer_address:_xxx
________Link-layer_address_(Ethernet):_xxx
____Server_Identifier
________Option:_Server_Identifier_(2)
________Length:_10
________DUID:_0003000628011c3da73f
________DUID_Type:_link-layer_address_(3)
________Hardware_type:_IEEE_802_(6)
________Link-layer_address:_xxx
________Link-layer_address_(Ethernet):_xxx
____Identity_Association_for_Non-temporary_Address
________Option:_Identity_Association_for_Non-temporary_Address_(3)
________Length:_40
________IAID:_03e09467
________T1:_26117
________T2:_41787
________IA_Address
____________Option:_IA_Address_(5)
____________Length:_24
____________IPv6_address:_240e:3af:e1a:2080:e294:67ff:fe0f:af4b
____________Preferred_lifetime:_52234
____________Valid_lifetime:_52234
____Preference
________Option:_Preference_(7)
________Length:_1
________Pref-value:_7
____DNS_recursive_name_server
________Option:_DNS_recursive_name_server_(23)
________Length:_16
_________1_DNS_server_address:_fe80::1
____Vendor-specific_Information
________Option:_Vendor-specific_Information_(17)
________Length:_25
________Enterprise_ID:_Reserved_(0)

Openwrt 路由器的 Advertise

DHCPv6
Message type: Advertise (2)
Transaction ID: 0x19f696
Server Identifier
Option: Server Identifier (2)
Length: 10
DUID: xxx
DUID Type: link-layer address (3)
Hardware type: Ethernet (1)
Link-layer address: xxx
Link-layer address (Ethernet): xxx
Client Identifier
Option: Client Identifier (1)
Length: 14
DUID: xxx
DUID Type: link-layer address plus time (1)
Hardware type: Ethernet (1)
DUID Time: Dec 28, 2022 00:08:43.000000000 中国标准时间
Link-layer address: xxx
Link-layer address (Ethernet): xxx
SOL_MAX_RT
Option: SOL_MAX_RT (82)
Length: 4
DNS recursive name server
Option: DNS recursive name server (23)
Length: 16
1 DNS server address: fd5c:1e:6cb0::1
Identity Association for Non-temporary Address
Option: Identity Association for Non-temporary Address (3)
Length: 40
IAID: 03e09467
T1: 21600
T2: 34560
IA Address
Option: IA Address (5)
Length: 24
IPv6 address: fd5c:1e:6cb0::7e8
Preferred lifetime: 43200
Valid lifetime: 43200

------------

光猫的 Advertise

DHCPv6
Message type: Advertise (2)
Transaction ID: 0x19f696
Client Identifier
Option: Client Identifier (1)
Length: 14
DUID: xxx
DUID Type: link-layer address plus time (1)
Hardware type: Ethernet (1)
DUID Time: Dec 28, 2022 00:08:43.000000000 中国标准时间
Link-layer address: xxx
Link-layer address (Ethernet): xxx
Server Identifier
Option: Server Identifier (2)
Length: 10
DUID: 0003000628011c3da73f
DUID Type: link-layer address (3)
Hardware type: IEEE 802 (6)
Link-layer address: xxx
Link-layer address (Ethernet): xxx
Identity Association for Non-temporary Address
Option: Identity Association for Non-temporary Address (3)
Length: 40
IAID: 03e09467
T1: 26117
T2: 41787
IA Address
Option: IA Address (5)
Length: 24
IPv6 address: 240e:3af:e1a:2080:e294:67ff:fe0f:af4b
Preferred lifetime: 52234
Valid lifetime: 52234
Preference
Option: Preference (7)
Length: 1
Pref-value: 7
DNS recursive name server
Option: DNS recursive name server (23)
Length: 16
1 DNS server address: fe80::1
Vendor-specific Information
Option: Vendor-specific Information (17)
Length: 25
Enterprise ID: Reserved (0)

@luoshengdu
>> 去找 fe80::1 是因为你没有告诉电脑找 fd5c 的 IP
这里没看懂，告诉电脑用哪个 IPv6 地址，这就是 DHCPv6 的工作呀
现在电脑发送了 Solicit 请求，路由和光猫都回复了 Advertise 。只是电脑挑选了光猫来进行接下来的协议。

>> 在 dhcp 服务器上配置 v6 dns 的信息下发
这一点也实现了，因为路由给出了 DHCPv6 Advertise ，其中包含了 DNS 。

>> IP 地址不存在优先级
刚才我找了下资料，确实是这样。
但是优先级现象是存在的。
问题出在 DHCPv6 协议的环节，当网络上存在多个 Advertise 时，电脑会做出倾向性选择
参考 https://blog.csdn.net/Kuaisen/article/details/118675607

我又仔细看了抓包记录里面的两个 Advertise ，光猫的带有 preference option 字段，openwrt 给出的没有这个 option 。我猜测电脑收到这两个 Advertise 后倾向于回复光猫就是因为他的带有 preference 。

然后我又找 openwrt 的 odhp 怎么能加入这个 preference option ，没找到有资料。

接下来我感觉解决方案有两类，一个是拿到光猫的超级用户密码，想办法禁止光猫的 DHCPv6 。再就是用带有 VLAN 的交换机或者增加一个路由器，向子网屏蔽光猫的 DHCPv6