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2021 年 12 月 3 日

回复了 sorasyl 创建的主题 › 宽带症候群 › 老哥们，路由已有 pb 前缀，设备 ipv6 依然无法上网

@acbot 老哥，我试了下改成中继，直接关闭了 lan 的 dhcpv6 ，但是设备拿到的始终是 fe 开头的内网 ip ，不是 isp 下发的公网 ip

2021 年 12 月 3 日

回复了 sorasyl 创建的主题 › 宽带症候群 › 老哥们，路由已有 pb 前缀，设备 ipv6 依然无法上网

@sorasyl ip6tables -L -t nat
Chain PREROUTING (policy ACCEPT)
target prot opt source destination
DNAT tcp anywhere anywhere tcp dpt:32400 to:[fdb1:98b4:438b::7f8]:32400

Chain INPUT (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

Chain POSTROUTING (policy ACCEPT)
target prot opt source destination
MASQUERADE all anywhere anywhere

2021 年 12 月 3 日

回复了 sorasyl 创建的主题 › 宽带症候群 › 老哥们，路由已有 pb 前缀，设备 ipv6 依然无法上网

@acbot 添加了之后,table 如下
Chain FORWARD (policy ACCEPT)
target prot opt source destination
ACCEPT all anywhere anywhere ctstate DNAT
forwarding_rule all anywhere anywhere /* !fw3: Custom forwarding rule chain */
ACCEPT all anywhere anywhere ctstate RELATED,ESTABLISHED /* !fw3 */
zone_lan_forward all anywhere anywhere /* !fw3 */
zone_wan_forward all anywhere anywhere /* !fw3 */
reject all anywhere anywhere /* !fw3 */

Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT tcp anywhere anywhere tcp dpt:32400
ACCEPT all anywhere anywhere ctstate DNAT
ACCEPT tcp anywhere anywhere tcp dpt:ssh
ACCEPT tcp anywhere anywhere tcp dpt:7788
ACCEPT all anywhere anywhere /* !fw3 */
input_rule all anywhere anywhere /* !fw3: Custom input rule chain */
ACCEPT all anywhere anywhere ctstate RELATED,ESTABLISHED /* !fw3 */
syn_flood tcp anywhere anywhere tcp flags:FIN,SYN,RST,ACK/SYN /* !fw3 */
zone_lan_input all anywhere anywhere /* !fw3 */
zone_wan_input all anywhere anywhere /* !fw3 */

telnet 该端口超时
telnet -6 240e:398:332:9:1e40:e8cd:7b12:327c 32400
Trying 240e:398:332:9:1e40:e8cd:7b12:327c...
telnet: connect to address 240e:398:332:9:1e40:e8cd:7b12:327c: Operation timed out
telnet: Unable to connect to remote host

2021 年 12 月 2 日

回复了 sorasyl 创建的主题 › 宽带症候群 › 老哥们，路由已有 pb 前缀，设备 ipv6 依然无法上网

@acbot ip6tables -t nat -L
Chain PREROUTING (policy ACCEPT)
target prot opt source destination
DNAT tcp anywhere anywhere tcp dpt:8087 to:[fd61:3912:b533::16e]:8087

Chain INPUT (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

Chain POSTROUTING (policy ACCEPT)
target prot opt source destination
MASQUERADE all anywhere anywhere

路由器 ping 设备
ping6 fd61:3912:b533::16e
PING fd61:3912:b533::16e(fd61:3912:b533::16e) 56 data bytes
64 bytes from fd61:3912:b533::16e: icmp_seq=1 ttl=64 time=5.41 ms
64 bytes from fd61:3912:b533::16e: icmp_seq=2 ttl=64 time=1.71 ms
--- fd61:3912:b533::16e ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 1.706/3.556/5.407/1.850 ms

已实现内部设备 v6 NAT 上网，但我使用以下规则无法实现端口转发，请教下如何排查问题
ip6tables -I INPUT -p tcp --dport 8087 -j ACCEPT
ip6tables -t nat -I PREROUTING -p tcp --dport 8087 -j DNAT --to [fd61:3912:b533::16e]:8087

2021 年 11 月 30 日

回复了 sorasyl 创建的主题 › 宽带症候群 › 老哥们，路由已有 pb 前缀，设备 ipv6 依然无法上网

@acbot traceroute6 bbs6.ustc.edu.cn -s 240e:398:332:5f:1e40:e89f:3312:327c
traceroute to bbs6.ustc.edu.cn (2001:da8:d800::3) from 240e:398:332:5f:1e40:e89f:3312:327c, 30 hops max, 64 byte packets
1 240e:398:332:: (240e:398:332::) 7.669 ms 5.845 ms 4.481 ms
2 240e:16:1000:702::2 (240e:16:1000:702::2) 4.386 ms 8.288 ms 240e:16:1000:703::2 (240e:16:1000:703::2) 11.790 ms
3 240e:16:1001:26::2 (240e:16:1001:26::2) 4.119 ms 240e:16:1001:2d::2 (240e:16:1001:2d::2) 4.968 ms 240e:16:1001:e::2 (240e:16:1001:e::2) 10.552 ms
4 240e::1:31:81:6022 (240e::1:31:81:6022) 34.381 ms * 240e::1:31:81:6402 (240e::1:31:81:6402) 30.460 ms
5 * * *
6 240e::e:3:2008:403 (240e::e:3:2008:403) 38.569 ms 37.962 ms 39.352 ms
7 2001:da8:2:704::1 (2001:da8:2:704::1) 37.627 ms 35.178 ms 43.262 ms
8 2001:da8:2:16::2 (2001:da8:2:16::2) 47.890 ms 46.925 ms 46.816 ms
9 2001:da8:2:f::1 (2001:da8:2:f::1) 47.488 ms 46.611 ms 48.111 ms
10 2001:da8:2:e::2 (2001:da8:2:e::2) 55.295 ms 55.932 ms 60.028 ms
11 * * 2001:da8:2:111::2 (2001:da8:2:111::2) 59.003 ms
12 2001:da8:b3:14::2 (2001:da8:b3:14::2) 60.921 ms 61.645 ms 61.812 ms
13 2001:da8:b3:101::10 (2001:da8:b3:101::10) 58.573 ms 53.646 ms 56.812 ms
14 bbs6.ustc.edu.cn (2001:da8:d800::3) 54.360 ms 55.533 ms 56.945 ms

测试应该就是运营商没有对外发布路由

2021 年 11 月 30 日

回复了 sorasyl 创建的主题 › 宽带症候群 › 老哥们，路由已有 pb 前缀，设备 ipv6 依然无法上网

@acbot 感谢老哥，我用 traceroute 分别测试了:
traceroute6 -s 240e:39b:3a1:b70::1 bbs6.ustc.edu.cn
traceroute to bbs6.ustc.edu.cn (2001:da8:d800::3) from 240e:39b:3a1:b70::1, 30 hops max, 64 byte packets
1 240e:398:332:: (240e:398:332::) 6.888 ms 6.529 ms 4.333 ms
2 240e:16:1002:a706::2 (240e:16:1002:a706::2) 7.710 ms 4.169 ms 240e:16:1002:c0b::2 (240e:16:1002:c0b::2) 5.613 ms
3 *

traceroute6 -s 240e:398:332:5f:1e40:e848:7512:327c bbs6.ustc.edu.cn
traceroute to bbs6.ustc.edu.cn (2001:da8:d800::3) from 240e:398:332:5f:1e40:e848:7512:327c, 30 hops max, 64 byte packets
1 240e:398:332:: (240e:398:332::) 5.821 ms 5.471 ms 4.521 ms
2 240e:16:1000:6bf::2 (240e:16:1000:6bf::2) 16.984 ms 4.733 ms 240e:16:1002:a711::2 (240e:16:1002:a711::2) 6.638 ms
3 240e:16:1001:10f::2 (240e:16:1001:10f::2) 4.998 ms 240e:16:1001:12b::2 (240e:16:1001:12b::2) 3.459 ms 240e:16:1001:114::2 (240e:16:1001:114::2) 4.751 ms
4 240e::1:31:81:5402 (240e::1:31:81:5402) 38.134 ms 39.012 ms 240e::1:31:81:5302 (240e::1:31:81:5302) 39.610 ms
5 *

以上为关闭 ip6tables 测试

2021 年 11 月 30 日

回复了 sorasyl 创建的主题 › 宽带症候群 › 老哥们，路由已有 pb 前缀，设备 ipv6 依然无法上网

@acbot 路由器 traceout 科大论坛，如下：
traceroute to bbs6.ustc.edu.cn (2001:da8:d800::3), 30 hops max, 64 byte packets
1 240e:398:332:: 5.750 ms
2 240e:16:1002:c00::2 8.172 ms

设备无法 ping 通路由器分配的网关：
ping6 fe80::1e40:e8ff:fe12:327d
PING6(56=40+8+8 bytes) fe80::463:37b7:e560:f9c4%en0 --> fe80::1e40:e8ff:fe12:327d
ping6: sendmsg: No route to host
ping6: wrote fe80::1e40:e8ff:fe12:327d 16 chars, ret=-1

v6 路由表如下
Destination Next Hop Flags Metric Ref Use Iface
::/0 fe80::ce1a:faff:feea:e1a0 UG 512 2 0 pppoe-wan
::/0 fe80::ce1a:faff:feea:e1a0 UG 512 6 0 pppoe-wan
240e:398:332:5f::/64 :: U 256 2 0 pppoe-wan
240e:398:332:5f::/64 :: !n 2147483647 2 0 lo
240e:39b:3a1:b70::/64 :: U 1024 1 0 br-lan
240e:39b:3a1:b70::/60 :: !n 2147483647 1 0 lo
fe80::1e40:e848:7512:327c/128 :: U 256 1 0 pppoe-wan
fe80::ce1a:faff:feea:e1a0/128 :: U 1 1 0 pppoe-wan
fe80::/64 :: U 256 1 0 eth0.2
fe80::/64 :: U 256 1 0 eth0
fe80::/64 :: U 256 2 0 br-lan
fe80::/64 :: U 256 1 0 wlan0
fe80::/64 :: U 256 1 0 wlan1
::/0 :: !n -1 2 0 lo
::1/128 :: Un 0 7 0 lo
240e:398:332:5f::/128 :: Un 0 3 0 pppoe-wan
240e:398:332:5f:1e40:e848:7512:327c/128 :: Un 0 4 0 pppoe-wan
240e:39b:3a1:b70::/128 :: Un 0 3 0 br-lan
240e:39b:3a1:b70::1/128 :: Un 0 5 0 br-lan
fe80::/128 :: Un 0 3 0 eth0.2
fe80::/128 :: Un 0 3 0 eth0
fe80::/128 :: Un 0 3 0 br-lan
fe80::/128 :: Un 0 3 0 wlan0
fe80::/128 :: Un 0 3 0 wlan1
fe80::1e40:e848:7512:327c/128 :: Un 0 5 0 pppoe-wan
fe80::1e40:e8ff:fe12:327c/128 :: Un 0 4 0 eth0.2
fe80::1e40:e8ff:fe12:327c/128 :: Un 0 2 0 eth0
fe80::1e40:e8ff:fe12:327d/128 :: Un 0 3 0 br-lan
fe80::1e40:e8ff:fe12:327e/128 :: Un 0 3 0 wlan0
fe80::1e40:e8ff:fe12:327f/128 :: Un 0 2 0 wlan1
ff00::/8 :: U 256 4 0 eth0.2
ff00::/8 :: U 256 2 0 pppoe-wan
ff00::/8 :: U 256 1 0 eth0
ff00::/8 :: U 256 4 0 br-lan
ff00::/8 :: U 256 1 0 wlan0
ff00::/8 :: U 256 1 0 wlan1
::/0 :: !n -1 2 0 lo

2021 年 11 月 29 日

回复了 sorasyl 创建的主题 › 宽带症候群 › 老哥们，路由已有 pb 前缀，设备 ipv6 依然无法上网

@datou 电脑 pppoe 拨号正常，实际上路由器加上我说的那条 iptable 也可以上网，但是这相当于组了一个 ipv6 的 nat

2021 年 4 月 14 日

回复了 sorasyl 创建的主题 › 宽带症候群 › 老哥们，请教个网络问题。

@3dwelcome 软路由更符合需求，但是服务器没有公网 ip，折腾了半天始终不能转发数据包

2021 年 4 月 14 日

回复了 sorasyl 创建的主题 › 宽带症候群 › 老哥们，请教个网络问题。

感谢各位老哥指点
我试了下 socks5 代理 windows 只能跑下 http，其他的应用需要单独设置代理，用 ipforwad 做转发更好

2021 年 4 月 14 日

回复了 sorasyl 创建的主题 › 宽带症候群 › 老哥们，请教个网络问题。

@tankren 啊这，太黑人了吧