綁定到 IPv6 子網路 (/64) 的隨機 IP 不起作用

綁定到 IPv6 子網路 (/64) 的隨機 IP 不起作用

我有一個scaleway.com 伺服器(DEV1-S),它為我提供了/64 IPv6 子網路。我想使用此子網路中的 IP 發出 HTTP 請求(將在範例中使用 wget),但我無法讓它工作。請求(使用 wget 以及其他程式和程式語言)將掛起。

IPv6 位址為 2001:bc8:1830:1b18::1,閘道為 2001:bc8:1830:1b18::,網路遮罩為 64。

ip -6 addr在乾淨的/剛剛建立的伺服器上運行,將輸出以下內容:

root@test:~# ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 state UNKNOWN qlen 1000
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP qlen 1000
    inet6 2001:bc8:1830:1b18::1/64 scope global 
       valid_lft forever preferred_lft forever
    inet6 fe80::dc2e:4cff:fe57:a019/64 scope link 
       valid_lft forever preferred_lft forever

我在論壇和其他問題/答案中讀到,為了使您能夠綁定到子網路中的位址,您需要執行以下命令:

ip add add local 2001:bc8:1830:1b18::/64 dev lo
ip route add local 2001:bc8:1830:1b18::/64 dev ens2
sysctl -w net.ipv6.ip_nonlocal_bind=1

這些命令之後,輸出ip -6 addr如下:

root@test:~# ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 state UNKNOWN qlen 1000
    inet6 2001:bc8:1830:1b18::/64 scope global 
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP qlen 1000
    inet6 2001:bc8:1830:1b18::1/64 scope global 
       valid_lft forever preferred_lft forever
    inet6 fe80::dc2e:4cff:fe57:a019/64 scope link 
       valid_lft forever preferred_lft forever

我現在可以 ping6 例如,2001:bc8:1830:1b18::9而不是僅2001:bc8:1830:1b18::1,但只能從我自己的伺服器。不是來自其他伺服器/網路。

如果沒有sysctl -w net.ipv6.ip_nonlocal_bind=1,wget 將會回傳:

root@test:~# wget --bind-address=2001:bc8:1830:1b18::2 -v google.com
--2021-08-13 00:29:45--  http://google.com/
Resolving google.com (google.com)... 2a00:1450:400e:802::200e, 142.250.179.174
Connecting to google.com (google.com)|2a00:1450:400e:802::200e|:80... failed: Cannot assign requested address.
Connecting to google.com (google.com)|142.250.179.174|:80... failed: Address family not supported by protocol.

現在,在 3 個命令之後,當我運行 wget 並將 --bind-address 標誌設置為子網中除 之外的地址時2001:bc8:1830:1b18::1,請求將永遠掛起:

root@test:~# wget --bind-address=2001:bc8:1830:1b18::1 google.com
--2021-08-12 23:55:48--  http://google.com/
Resolving google.com (google.com)... 2a00:1450:400e:802::200e, 142.250.179.174
Connecting to google.com (google.com)|2a00:1450:400e:802::200e|:80... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: http://www.google.com/ [following]
--2021-08-12 23:55:48--  http://www.google.com/
Resolving www.google.com (www.google.com)... 2a00:1450:400e:80f::2004, 142.251.36.4
Connecting to www.google.com (www.google.com)|2a00:1450:400e:80f::2004|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/html]
Saving to: ‘index.html’

index.html                                                                       [ <=>                                                                                                                                                                                         ]  13.03K  --.-KB/s    in 0.009s  

2021-08-12 23:55:48 (1.44 MB/s) - ‘index.html’ saved [13342]

root@test:~# wget --bind-address=2001:bc8:1830:1b18::2 google.com
--2021-08-12 23:55:52--  http://google.com/
Resolving google.com (google.com)... 2a00:1450:400e:802::200e, 142.250.179.174
Connecting to google.com (google.com)|2a00:1450:400e:802::200e|:80... 

lsof對於 wget 進程,內容如下: wget 3413 root 3u IPv6 58660 0t0 TCP[2001:bc8:1830:1b18::2]:56623->ams15s41-in-x0e.1e100.net:http (SYN_SENT)

我究竟做錯了什麼?預先非常感謝!

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