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[Bug] immortalwrt 23.05 默认配置,开启白名单后路由器本身无法上网,外网也连不进来 #797

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bsdcpp opened this issue Oct 16, 2024 · 31 comments

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@bsdcpp
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bsdcpp commented Oct 16, 2024

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  • 我已经在 Issue Tracker 中找过我要提出的问题 I have searched on the issue tracker for a related issue.
  • 我已经使用公测版本测试过,问题依旧存在 I have tested using the test mod, and the issue still exists.
  • 我已经仔细看过 常见问题 并无法自行解决问题

Description

全新安装的情况下也能复现,切换黑名单/关闭sc马上恢复。局域网设备好像不受影响,路由器本身国内163,baidu都无法ping通,谢谢。
shellcrash新装默认配置,只改了tproxy:nftables + tproxy + fake

@juewuy
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juewuy commented Oct 16, 2024

@bsdcpp 脚本什么版本,另外是否启用了本机代理,然后提供一下问题状态的8-1-4内容

@bsdcpp
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bsdcpp commented Oct 16, 2024

版本:1.9.1rc7
这是默认黑名单情况

table inet shellcrash {
	chain input {
		type filter hook input priority -100; policy accept;
		ip daddr 127.0.0.1 accept
		tcp dport 9999 ip saddr { 10.0.8.0/24, 192.168.1.0-192.168.3.255 } accept
		tcp dport 9999 reject
		tcp dport 7890 ip saddr { 10.0.8.0/24, 192.168.1.0-192.168.3.255 } accept
		tcp dport 7890 reject
	}

	chain prerouting_dns {
		type nat hook prerouting priority dstnat; policy accept;
		udp dport != 53 return
		tcp dport != 53 return
		meta mark 0x00001ed6 return
		meta skgid { 453, 7890 } return
		ip saddr != { 10.0.8.0/24, 192.168.1.0-192.168.3.255 } return
		ip6 saddr != { 2408:820c:8211:f179::/64, 2408:820c:8218:7c90::/60, 240e:388:8101:df00::/60, 240e:38f:8105:2038::/64, fd00::/8, fe80::/10 } reject with icmpv6 port-unreachable
		udp dport 53 redirect to :1053
		tcp dport 53 redirect to :1053
	}

	chain prerouting {
		type filter hook prerouting priority mangle; policy accept;
		tcp dport 53 return
		udp dport 53 return
		tcp dport != { 22, 80, 143, 194, 443, 465, 587, 853, 993, 995, 5222, 8080, 8443 } ip daddr != 198.18.0.0/16 return
		meta mark 0x00001ed6 return
		meta skgid 7890 return
		ip daddr { 0.0.0.0/8, 10.0.0.0/8, 100.64.0.0/10, 127.0.0.0/8, 169.254.0.0/16, 172.16.0.0/12, 192.168.0.0/16, 224.0.0.0/3 } return
		ip saddr != { 10.0.8.0/24, 192.168.1.0-192.168.3.255 } return
		ip6 daddr { ::/127, ::ffff:0.0.0.0/96, 64:ff9b::/96, 100::/64, 2001::/32, 2001:20::/28, 2001:db8::/32, 2002::/16, 2408:820c:8211:f179::/64, 2408:820c:8218:7c90::/60, 240e:388:8101:df00::/60, 240e:38f:8105:2038::/64, fc00::/7, fe80::/10, ff00::/8 } return
		ip6 saddr != { 2408:820c:8211:f179::/64, 2408:820c:8218:7c90::/60, 240e:388:8101:df00::/60, 240e:38f:8105:2038::/64, fd00::/8, fe80::/10 } return
		meta l4proto { tcp, udp } meta mark set 0x00001ed4 tproxy to :7893
	}
}

以下是白名单不正常的情况:

table inet shellcrash {
	chain input {
		type filter hook input priority -100; policy accept;
		ip daddr 127.0.0.1 accept
		tcp dport 9999 ip saddr { 10.0.8.0/24, 192.168.1.0-192.168.3.255 } accept
		tcp dport 9999 reject
		tcp dport 7890 ip saddr { 10.0.8.0/24, 192.168.1.0-192.168.3.255 } accept
		tcp dport 7890 reject
	}

	chain prerouting_dns {
		type nat hook prerouting priority dstnat; policy accept;
		udp dport != 53 return
		tcp dport != 53 return
		meta mark 0x00001ed6 return
		meta skgid { 453, 7890 } return
		ip saddr != { 10.0.8.0/24, 192.168.1.0-192.168.3.255 } return
		ip6 saddr != { 2408:820c:8211:f179::/64, 2408:820c:8218:7c90::/60, 240e:388:8101:df00::/60, 240e:38f:8105:2038::/64, fd00::/8, fe80::/10 } reject with icmpv6 port-unreachable
		udp dport 53 redirect to :1053
		tcp dport 53 redirect to :1053
	}

	chain prerouting {
		type filter hook prerouting priority mangle; policy accept;
		tcp dport 53 return
		udp dport 53 return
		tcp dport != { 22, 80, 143, 194, 443, 465, 587, 853, 993, 995, 5222, 8080, 8443 } ip daddr != 198.18.0.0/16 return
		meta mark 0x00001ed6 return
		meta skgid 7890 return
		ip daddr { 0.0.0.0/8, 10.0.0.0/8, 100.64.0.0/10, 127.0.0.0/8, 169.254.0.0/16, 172.16.0.0/12, 192.168.0.0/16, 224.0.0.0/3 } return
		ip6 daddr { ::/127, ::ffff:0.0.0.0/96, 64:ff9b::/96, 100::/64, 2001::/32, 2001:20::/28, 2001:db8::/32, 2002::/16, 2408:820c:8211:f179::/64, 2408:820c:8218:7c90::/60, 240e:388:8101:df00::/60, 240e:38f:8105:2038::/64, fc00::/7, fe80::/10, ff00::/8 } return
		ip6 saddr != { 2408:820c:8211:f179::/64, 2408:820c:8218:7c90::/60, 240e:388:8101:df00::/60, 240e:38f:8105:2038::/64, fd00::/8, fe80::/10 } return
		meta l4proto { tcp, udp } meta mark set 0x00001ed4 tproxy to :7893
	}
}

对比后,差异在 ip saddr != { 10.0.8.0/24, 192.168.1.0-192.168.3.255 } return

@juewuy
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juewuy commented Oct 16, 2024

@bsdcpp 看不出问题,防火墙配置是正常的,理论上也不会影响本机

@bsdcpp
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bsdcpp commented Oct 16, 2024

@bsdcpp 看不出问题,防火墙配置是正常的,理论上也不会影响本机

我更新了下回复,麻烦再看下。

@juewuy
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juewuy commented Oct 16, 2024

@bsdcpp 这里防火墙配置都是正常的,prerouting链也不会影响本机流量

@juewuy
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juewuy commented Oct 16, 2024

@bsdcpp 如果是在docker中测试,需要启用容器/虚拟机代理功能

@bsdcpp
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bsdcpp commented Oct 16, 2024

我是在真机环境下安装的,之前用iptables是没问题的,我再调试下看看,顺便学习下nft,感谢大佬解答,售后一级棒🎉

@bsdcpp
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bsdcpp commented Oct 16, 2024

@juewuy
通过tcpdump观察,开黑名单的时候:

22:07:26.882400 pppoe-wan In  IP 进入IP.32964 > 服务端IP.50000: UDP, length 96
22:07:26.937646 pppoe-wan Out IP 服务端IP.50000 > 进入IP.32964: UDP, length 96
22:07:26.994227 pppoe-wan In  IP 进入IP.32964 > 服务端IP.50000: UDP, length 96
22:07:27.561369 pppoe-wan In  IP 进入IP.32964 > 服务端IP.50000: UDP, length 96
22:07:27.671277 pppoe-wan In  IP 进入IP.32964 > 服务端IP.50000: UDP, length 96
22:07:28.006316 pppoe-wan In  IP 进入IP.32964 > 服务端IP.50000: UDP, length 96
22:07:28.618137 pppoe-wan Out IP 服务端IP.50000 > 进入IP.32964: UDP, length 96

一旦开白名单,似乎有包进了lo,回环了吗,只有进没有出了?
可以看到pppoe-wan In IP 进入IP.发了一个148长度的包,接下来下一条服务器照同样大小也发了一份,并且发给了lo,然后又回给了自己。

22:07:28.652399 pppoe-wan In  IP 进入IP.32964 > 服务端IP.50000: UDP, length 148
22:07:28.665062 lo    In  IP 服务端IP.33441 > 服务端IP.50000: UDP, length 148
22:07:28.777946 lo    In  IP 服务端IP.50000 > 服务端IP.33441: UDP, length 92
22:07:28.778022 lo    In  IP 服务端IP.50000 > 服务端IP.33441: UDP, length 92
22:07:28.842484 pppoe-wan In  IP 进入IP.32964 > 服务端IP.50000: UDP, length 148
22:07:28.850514 lo    In  IP 服务端IP.48605 > 服务端IP.50000: UDP, length 92
22:07:28.850914 lo    In  IP 服务端IP.50000 > 服务端IP.48605: UDP, length 92
22:07:28.938108 lo    In  IP 服务端IP.50000 > 服务端IP.48605: UDP, length 92
22:07:29.098005 lo    In  IP 服务端IP.50000 > 服务端IP.48605: UDP, length 92
22:07:29.201430 pppoe-wan In  IP 进入IP.32964 > 服务端IP.50000: UDP, length 92

貌似之前看到过这样的问题,不知道是不是同一类问题:#783
他影响的是DNAT转发内网的,我直接影响本机😂

请教下,这个流是不是进入核心了?

root@ImmortalWrt:/etc# ip ru
0:	from all lookup local
32765:	from all fwmark 0x1ed4 lookup 100
32766:	from all lookup main
32767:	from all lookup default
root@ImmortalWrt:/etc# ip r list table 100
local default dev lo scope host
root@ImmortalWrt:/etc#

没看懂,tproxy走的是个lo接口?

@pleasant98
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我这边是把ipv6透明代理关了就能通过ipv6访问局域网设备了

@bsdcpp
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bsdcpp commented Oct 17, 2024

我这边是把ipv6透明代理关了就能通过ipv6访问局域网设备了

谢谢反馈,我现在只能用黑名单模式,和nft/iptables关系不大

@juewuy
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juewuy commented Oct 19, 2024

@juewuy 通过tcpdump观察,开黑名单的时候:

22:07:26.882400 pppoe-wan In  IP 进入IP.32964 > 服务端IP.50000: UDP, length 96
22:07:26.937646 pppoe-wan Out IP 服务端IP.50000 > 进入IP.32964: UDP, length 96
22:07:26.994227 pppoe-wan In  IP 进入IP.32964 > 服务端IP.50000: UDP, length 96
22:07:27.561369 pppoe-wan In  IP 进入IP.32964 > 服务端IP.50000: UDP, length 96
22:07:27.671277 pppoe-wan In  IP 进入IP.32964 > 服务端IP.50000: UDP, length 96
22:07:28.006316 pppoe-wan In  IP 进入IP.32964 > 服务端IP.50000: UDP, length 96
22:07:28.618137 pppoe-wan Out IP 服务端IP.50000 > 进入IP.32964: UDP, length 96

一旦开白名单,似乎有包进了lo,回环了吗,只有进没有出了? 可以看到pppoe-wan In IP 进入IP.发了一个148长度的包,接下来下一条服务器照同样大小也发了一份,并且发给了lo,然后又回给了自己。

22:07:28.652399 pppoe-wan In  IP 进入IP.32964 > 服务端IP.50000: UDP, length 148
22:07:28.665062 lo    In  IP 服务端IP.33441 > 服务端IP.50000: UDP, length 148
22:07:28.777946 lo    In  IP 服务端IP.50000 > 服务端IP.33441: UDP, length 92
22:07:28.778022 lo    In  IP 服务端IP.50000 > 服务端IP.33441: UDP, length 92
22:07:28.842484 pppoe-wan In  IP 进入IP.32964 > 服务端IP.50000: UDP, length 148
22:07:28.850514 lo    In  IP 服务端IP.48605 > 服务端IP.50000: UDP, length 92
22:07:28.850914 lo    In  IP 服务端IP.50000 > 服务端IP.48605: UDP, length 92
22:07:28.938108 lo    In  IP 服务端IP.50000 > 服务端IP.48605: UDP, length 92
22:07:29.098005 lo    In  IP 服务端IP.50000 > 服务端IP.48605: UDP, length 92
22:07:29.201430 pppoe-wan In  IP 进入IP.32964 > 服务端IP.50000: UDP, length 92

貌似之前看到过这样的问题,不知道是不是同一类问题:#783 他影响的是DNAT转发内网的,我直接影响本机😂

请教下,这个流是不是进入核心了?

root@ImmortalWrt:/etc# ip ru
0:	from all lookup local
32765:	from all fwmark 0x1ed4 lookup 100
32766:	from all lookup main
32767:	from all lookup default
root@ImmortalWrt:/etc# ip r list table 100
local default dev lo scope host
root@ImmortalWrt:/etc#

没看懂,tproxy走的是个lo接口?

lo没问题啊,有问题的是为什么流量会进到内核,不进内核不会被打上标记

@juewuy
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juewuy commented Oct 19, 2024

@juewuy c98e50b

@bsdcpp
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bsdcpp commented Oct 19, 2024

感谢修复,不过我测试了下,还是挺烧脑的:
外网wg进来是10.0.8.0/24网段,只添加了白名单mac。
nftables:

  1. redir : 都没有问题
  2. tproxy/tun :wg无法访问内外网

iptables:
Redir/tproxy/tun: wg进来可以访问正常;局域网设备内外网正常,但离奇的是无法访问clash api的控制网页

@juewuy
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juewuy commented Oct 19, 2024

@bsdcpp 进阶设置防火墙里可能需要添加一下自定义网段

@bsdcpp
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bsdcpp commented Oct 19, 2024

@bsdcpp 进阶设置防火墙里可能需要添加一下自定义网段

谢谢,里面已经有10.0.8.1/24段了,而且新的immortalwrt有点难搞:
redir + nftables 模式,怎么感觉规则有重复

chain prerouting {
		type nat hook prerouting priority dstnat; policy accept;
		tcp dport 53 return
		udp dport 53 return
		tcp dport != { 22, 80, 143, 194, 443, 465, 587, 853, 993, 995, 5222, 8080, 8443 } ip daddr != 198.18.0.0/16 return
		meta mark 0x00001ed6 return
		meta skgid 7890 return
		ip daddr 0.0.0.0 return
		ether saddr != { 00:04:4b:84:20:ac,fc:7c:02:92:b4:fa } ip saddr != 10.0.8.0/24 return
		meta nfproto ipv6 return
		meta l4proto tcp redirect to :7892
		tcp dport 53 return
		udp dport 53 return
		tcp dport != { 22, 80, 143, 194, 443, 465, 587, 853, 993, 995, 5222, 8080, 8443 } ip daddr != 198.18.0.0/16 return
		meta mark 0x00001ed6 return
		meta skgid 7890 return
		ip daddr 0.0.0.0 return
		ether saddr != { 00:04:4b:84:20:ac, fc:7c:02:92:b4:fa } ip saddr != 10.0.8.0/24 return
		meta nfproto ipv6 return
		meta l4proto { tcp, udp } meta mark set 0x00001ed4 tproxy to :7893
	}

@juewuy
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juewuy commented Oct 19, 2024

@bsdcpp 重启设备吧,感觉有点乱

@bsdcpp
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bsdcpp commented Oct 19, 2024

重启immortalwrt后还是一样的情况

@juewuy
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juewuy commented Oct 19, 2024

@bsdcpp 好吧,明天有空我看一下

@bsdcpp
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bsdcpp commented Oct 19, 2024

感谢,等你方便的时候,我主要用老的21的openwrt,一直很稳,这个新系统包括nftables确实比较令人崩溃。
我先看下是哪里执行了两次,sc重启有个报错:

Error: Could not process rule: File exists
add chain inet shellcrash prerouting { type filter hook prerouting priority -150 ; }
                          ^^^^^^^^^^

@bsdcpp
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bsdcpp commented Oct 19, 2024

应该是这行判断导致

[ "$redir_mod" = "Tproxy模式" ] && modprobe nft_tproxy >/dev/null 2>&1 || lsmod 2>/dev/null | grep -q nft_tproxy && {

改成

[ "$redir_mod" = "Tproxy模式" ] && ( modprobe nft_tproxy >/dev/null 2>&1 || lsmod 2>/dev/null | grep -q nft_tproxy ) && {

没有重复

@juewuy
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juewuy commented Oct 19, 2024

@bsdcpp OK

@bsdcpp
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bsdcpp commented Oct 19, 2024

对比了下nft和ipt的区别,mangle表里ipt的tproxy处理规则

Chain shellcrash_mark (4 references)
target     prot opt source               destination
RETURN     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:53
RETURN     udp  --  0.0.0.0/0            0.0.0.0/0            udp dpt:53
RETURN     all  --  0.0.0.0/0            0.0.0.0/0            mark match 0x1ed6
RETURN     all  --  0.0.0.0/0            192.168.1.0/24
RETURN     all  --  0.0.0.0/0            192.168.3.0/24
RETURN     all  --  0.0.0.0/0            192.168.2.0/24
RETURN     all  --  0.0.0.0/0            192.168.77.0/24
RETURN     all  --  0.0.0.0/0            10.0.8.0/24
RETURN     all  --  0.0.0.0/0            0.0.0.0
TPROXY     tcp  --  0.0.0.0/0            0.0.0.0/0            MAC cc:2d:b5:69:85:cd TPROXY redirect 0.0.0.0:7893 mark 0x1ed4/0xffffffff
TPROXY     tcp  --  0.0.0.0/0            0.0.0.0/0            MAC 00:e1:4e:b4:48:9c TPROXY redirect 0.0.0.0:7893 mark 0x1ed4/0xffffffff

nft:

chain prerouting {
		type filter hook prerouting priority mangle; policy accept;
		tcp dport 53 return
		udp dport 53 return
		tcp dport != { 22, 80, 143, 194, 443, 465, 587, 853, 993, 995, 5222, 8080, 8443 } ip daddr != 198.18.0.0/16 return
		meta mark 0x00001ed6 return
		meta skgid 7890 return
		ip daddr 0.0.0.0 return
		ether saddr != { cc:2d:b5:69:85:cd, 00:e1:4e:b4:48:9c } return
		meta nfproto ipv6 return
		meta l4proto { tcp, udp } meta mark set 0x00001ed4 tproxy to :7893
	}

相比较,nft的好似不一样,具体逻辑我不太懂:

  1. daddr { 10.0.8.0/24, 192.168.1.0-192.168.3.255, 192.168.77.0/24, 0.0.0.0/32 }的没有return
  2. 只要前面没有return的全部set mark 0x00001ed4,而ipt是匹配mac的才一一set,是不是改成类似会好点
    ether saddr = { cc:2d:b5:69:85:cd, 00:e1:4e:b4:48:9c } meta mark set 0x00001ed4 tproxy to :7893

@juewuy
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juewuy commented Oct 19, 2024

@bsdcpp 1应该是bug,2应该没什么区别

@bsdcpp
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bsdcpp commented Oct 19, 2024

@bsdcpp 1应该是bug,2应该没什么区别

嗯,我就怕有什么没考虑到的通过了所有return“关卡”来到了不该打标签的地方。一些回环啥的确实烧脑,难为大佬维护,不容易

@bsdcpp
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bsdcpp commented Oct 19, 2024

还有个神奇的地方是,iptables模式,只有在路由器上用127.0.0.1地址可以访问localhost:9999,用内网192.168.2.1访问不了。

Chain INPUT (policy ACCEPT)
num  target     prot opt source               destination
1    REJECT     udp  --  anywhere             anywhere             udp dpt:https reject-with icmp-port-unreachable
2    ACCEPT     tcp  --  anywhere             localhost
3    LUCKY      all  --  anywhere             anywhere
4    LUCKY      all  --  anywhere             anywhere
5    ACCEPT     tcp  --  0.0.0.0              anywhere             tcp dpt:9999
6    REJECT     tcp  --  anywhere             anywhere             tcp dpt:9999 reject-with icmp-port-unreachable
7    ACCEPT     tcp  --  0.0.0.0              anywhere             tcp dpt:7890
8    REJECT     tcp  --  anywhere             anywhere             tcp dpt:7890 reject-with icmp-port-unreachable

应该是被6 REJECT掉了

@juewuy
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juewuy commented Oct 19, 2024

@bsdcpp localhost就是你本机,当然只能在本机访问

@bsdcpp
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bsdcpp commented Oct 19, 2024

-A INPUT -s 0.0.0.0/32 -p tcp -m tcp --dport 9999 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 9999 -j REJECT --reject-with icmp-port-unreachable

是这样的,这个0.0.0.0/32正常吗?我去掉下面那个REJECT就内网设备可以访问了,是不是没匹配到这个0.0.0.0/32,导致走到了REJECT

@juewuy
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juewuy commented Oct 19, 2024

@bsdcpp 你这个设备有点问题,正常是会获取到局域网ip段的

@juewuy
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juewuy commented Oct 19, 2024

@bsdcpp getlanip这个函数里有具体命令你可以运行试试

@bsdcpp
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bsdcpp commented Oct 19, 2024

😂,是的,我看了正常的机器是:

spiderClash:/# iptables -L -n
Chain INPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     6    --  0.0.0.0/0            127.0.0.1
ACCEPT     6    --  0.0.0.0/8            0.0.0.0/0            tcp dpt:9999
ACCEPT     6    --  10.0.0.0/8           0.0.0.0/0            tcp dpt:9999
ACCEPT     6    --  127.0.0.0/8          0.0.0.0/0            tcp dpt:9999
ACCEPT     6    --  100.64.0.0/10        0.0.0.0/0            tcp dpt:9999
ACCEPT     6    --  169.254.0.0/16       0.0.0.0/0            tcp dpt:9999
ACCEPT     6    --  172.16.0.0/12        0.0.0.0/0            tcp dpt:9999
ACCEPT     6    --  192.168.0.0/16       0.0.0.0/0            tcp dpt:9999
ACCEPT     6    --  224.0.0.0/4          0.0.0.0/0            tcp dpt:9999
ACCEPT     6    --  240.0.0.0/4          0.0.0.0/0            tcp dpt:9999
REJECT     6    --  0.0.0.0/0            0.0.0.0/0            tcp dpt:9999 reject-with icmp-port-unreachable

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bsdcpp commented Oct 19, 2024

哈哈,确实,今天说的问题纯属意外,我看了下是因为我去访问7-3-4自定义内网段后,按了0返回导致reserved_ipv4='0'出现了一系列妖怪问题,抱歉。
是最近一次提交的78808be

然后回到之前,

应该是这行判断导致

[ "$redir_mod" = "Tproxy模式" ] && modprobe nft_tproxy >/dev/null 2>&1 || lsmod 2>/dev/null | grep -q nft_tproxy && {

改成

[ "$redir_mod" = "Tproxy模式" ] && ( modprobe nft_tproxy >/dev/null 2>&1 || lsmod 2>/dev/null | grep -q nft_tproxy ) && {

没有重复

这应该是一个问题。
然后标题说的tproxy模式下,按今天修复的,外面进来的依旧是内外网无法访问。
我是过一个办法,但不知道什么逻辑,目前正常,就不知道有没有漏洞请大佬有空分析下:就是仿照黑名单的办法,不管什么情况都添加一条

nft add rule inet shellcrash $1 ip saddr != {$HOST_IP} return  #仅代理本机局域网网段流量

按照今天你修复的情况

nft add rule inet shellcrash $1 ip saddr != {$HOST_IP} return #仅代理本机局域网网段流量

比方我白名单添加了mac/ip,走了elif分支,这样的话就不会添加上面那条了。

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