FreeBSD 13 PF 阻止越獄流量

將我的 FreeBSD 系統從 12.2 升級到 13.0-p3 後，PF 阻止了所有流向我的監獄的流量。禁用 PF 時，一切正常（除了不受保護；））

我試圖通過設置’block in log all’來弄清楚是什麼規則阻止了這個流量，但是除了一些明顯的多播內容之外，沒有任何東西可以解釋為什麼這個流量被阻止了。

同樣，在 12.2 版本下一切正常之前。我確實找到了一些關於 v13 現在過濾 VLAN 而不是 lo0 的文章，但我不使用任何 VLAN。

我應該進一步尋求什麼方向？

2021 年 7 月 15 日更新：

為清楚起見：這是我的 pf_rules 文件：

set block-policy return
set optimization aggressive
set skip on { lo0, lo1, lo2, lo3, lo4, lo5 }
ext_if=hn0
ext_address="{ 192.x.x.x, 2001:981:x.x::x }"
ext_services = "{ ssh, http, https, smtp, smtps }"
tcp_services = "{ ftp, ssh, domain, ntp, www, smtp, smtps, submission, http, https,nfs}"
udp_services = "{ domain, ntp, nfs }"
icmp6_types="{ 2, 128 }" # packet too big, echo request (ping6)
icmp6_types_ext_if="{ 128, 133, 134, 135, 136, 137 }"
jail_net = "192.168.1.0/24"
jail_services = "{ mysql, http, smtp, 587, 3000 }"
table <sshguard> persist
scrub in all
nat pass on $ext_if from $jail_net to any -> $ext_address
block in log on $ext_if proto tcp from <sshguard> to any port ssh label "ssh bruteforce"
block in log all
pass in quick from <pf_whitelist> flags S/SA synproxy state
pass out on $ext_if inet6 proto icmp6 all icmp6-type echoreq keep state
pass out on $ext_if inet proto udp to port 33433:33626
pass out on $ext_if inet6 proto udp to port 33433:33626
pass in on $ext_if inet6 proto ipv6-icmp icmp6-type $icmp6_types keep state
pass in on $ext_if inet6 proto ipv6-icmp from any to { ($ext_if ), ff02::1/16 } icmp6-type $i
cmp6_types_ext_if keep state
pass in on $ext_if proto tcp from any to $ext_address port $ext_services keep state
pass in on $ext_if inet6 proto tcp from any to $ext_address port $ext_services keep state
pass out on $ext_if inet proto tcp to any port $tcp_services keep state
pass out on $ext_if inet6 proto tcp to any port $tcp_services keep state
pass out on $ext_if inet6 proto udp to any port $udp_services
pass proto udp to any port $udp_services keep state
pass in proto tcp from any to $jail_net port $jail_services keep state
pass out proto tcp from $jail_net to any port $jail_services keep state
pass inet proto icmp from any to any

這已經工作了很多年，直到 FreeBSD 13

顯然，這與 PF 無關，而是與從 12.2 版升級到 13.0 版的過程有關。在物理伺服器上安裝版本 13 並使用一些服務創建監獄工作正常。所以它可能與虛擬伺服器上的升級有關，無論是 Hyper-V 還是其他東西。我仍然不知道設置和配置中的所有內容看起來都一樣（我從升級的虛擬伺服器複製了大部分內容，但它不起作用）

引用TCP SYN 代理：

| 如果 PF 在網橋(4) 上執行，SYN 代理將不起作用。

刪除標誌synproxy

pass in quick from <pf_whitelist> flags S/SA synproxy state

試試吧

pass in quick from <pf_whitelist> flags S/SA keep state

如果這可行，您可以將其僅用於監獄，並為其他人保留同步代理，例如

pass in quick from <pf_whitelist> to $jail_net flags S/SA keep state
pass in quick from <pf_whitelist> flags S/SA synproxy state

引用自：https://serverfault.com/questions/1069557