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BSD use SYN,ACK filter to catch autottl

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This commit is contained in:
bol-van 2024-03-09 12:45:17 +03:00
parent 48850b5f4e
commit 5ef3fb9e97
4 changed files with 31 additions and 16 deletions
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4
blockcheck.sh
View File

@ -364,8 +364,8 @@ pktws_ipt_prepare()
;;
ipfw)
IPFW_ADD divert $IPFW_DIVERT_PORT tcp from me to any $1 proto ip${IPV} out not diverted not sockarg
# this redirects all incoming traffic to the port, do not use it in real life !
IPFW_ADD divert $IPFW_DIVERT_PORT tcp from any $1 to me proto ip${IPV} in not diverted not sockarg
# for autottl mode
IPFW_ADD divert $IPFW_DIVERT_PORT tcp from any $1 to me proto ip${IPV} tcpflags syn,ack in
;;
esac
}

6
docs/bsd.eng.md
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@ -155,6 +155,8 @@ For all traffic:
```
ipfw delete 100
ipfw add 100 divert 989 tcp from any to any 80,443 out not diverted not sockarg xmit em0
# required for autottl mode only
ipfw add 100 divert 989 tcp from any 80,443 to any tcpflags syn,ack in recv em0
/opt/zapret/nfq/dvtws --port=989 --dpi-desync=split2
```
@ -163,6 +165,8 @@ Process only table zapret with the exception of table nozapret:
ipfw delete 100
ipfw add 100 allow tcp from me to table\(nozapret\) 80,443
ipfw add 100 divert 989 tcp from any to table\(zapret\) 80,443 out not diverted not sockarg xmit em0
# required for autottl mode only
ipfw add 100 divert 989 tcp from table\(zapret\) 80,443 to any tcpflags syn,ack in recv em0
/opt/zapret/nfq/dvtws --port=989 --dpi-desync=split2
```
@ -349,6 +353,7 @@ table <zapret> file "/opt/zapret/ipset/zapret-ip.txt"
table <zapret-user> file "/opt/zapret/ipset/zapret-ip-user.txt"
table <nozapret> file "/opt/zapret/ipset/zapret-ip-exclude.txt"
pass out quick on em0 inet proto tcp to <nozapret> port {80,443}
pass in quick on em0 inet proto tcp from <zapret> port {80,443} flags SA/SA divert-packet port 989 no state
pass in quick on em0 inet proto tcp from <zapret> port {80,443} no state
pass out quick on em0 inet proto tcp to <zapret> port {80,443} divert-packet port 989 no state
pass in quick on em0 inet proto tcp from <zapret-user> port {80,443} no state
@ -357,6 +362,7 @@ table <zapret6> file "/opt/zapret/ipset/zapret-ip6.txt"
table <zapret6-user> file "/opt/zapret/ipset/zapret-ip-user6.txt"
table <nozapret6> file "/opt/zapret/ipset/zapret-ip-exclude6.txt"
pass out quick on em0 inet6 proto tcp to <nozapret6> port {80,443}
pass in quick on em0 inet6 proto tcp from <zapret6> port {80,443} flags SA/SA divert-packet port 989 no state
pass in quick on em0 inet6 proto tcp from <zapret6> port {80,443} no state
pass out quick on em0 inet6 proto tcp to <zapret6> port {80,443} divert-packet port 989 no state
pass in quick on em0 inet6 proto tcp from <zapret6-user> port {80,443} no state

7
docs/bsd.txt
View File

@ -123,12 +123,16 @@ ipfw add 100 fwd ::1,988 tcp from any to any 80,443 proto ip6 recv em1
Для всего трафика :
ipfw delete 100
ipfw add 100 divert 989 tcp from any to any 80,443 out not diverted not sockarg xmit em0
# required for autottl mode only
ipfw add 100 divert 989 tcp from any 80,443 to any tcpflags syn,ack in recv em0
/opt/zapret/nfq/dvtws --port=989 ---dpi-desync=split2
Для трафика только на таблицу zapret, за исключением таблицы nozapret :
ipfw delete 100
ipfw add 100 allow tcp from me to table\(nozapret\) 80,443
ipfw add 100 divert 989 tcp from any to table\(zapret\) 80,443 out not diverted not sockarg xmit em0
# required for autottl mode only
ipfw add 100 divert 989 tcp from table\(zapret\) 80,443 to any tcpflags syn,ack in recv em0
/opt/zapret/nfq/dvtws --port=989 --dpi-desync=split2
Недопущение зацикливания - повторного вхождения фейк пакетов на обработку.
@ -282,6 +286,7 @@ dvtws для всего трафика :
/etc/pf.conf
------------
pass in quick on em0 proto tcp from port {80,443} flags SA/SA divert-packet port 989 no state
pass in quick on em0 proto tcp from port {80,443} no state
pass out quick on em0 proto tcp to port {80,443} divert-packet port 989 no state
------------
@ -297,6 +302,7 @@ table <zapret> file "/opt/zapret/ipset/zapret-ip.txt"
table <zapret-user> file "/opt/zapret/ipset/zapret-ip-user.txt"
table <nozapret> file "/opt/zapret/ipset/zapret-ip-exclude.txt"
pass out quick on em0 inet proto tcp to <nozapret> port {80,443}
pass in quick on em0 inet proto tcp from <zapret> port {80,443} flags SA/SA divert-packet port 989 no state
pass in quick on em0 inet proto tcp from <zapret> port {80,443} no state
pass out quick on em0 inet proto tcp to <zapret> port {80,443} divert-packet port 989 no state
pass in quick on em0 inet proto tcp from <zapret-user> port {80,443} no state
@ -305,6 +311,7 @@ table <zapret6> file "/opt/zapret/ipset/zapret-ip6.txt"
table <zapret6-user> file "/opt/zapret/ipset/zapret-ip-user6.txt"
table <nozapret6> file "/opt/zapret/ipset/zapret-ip-exclude6.txt"
pass out quick on em0 inet6 proto tcp to <nozapret6> port {80,443}
pass in quick on em0 inet6 proto tcp from <zapret6> port {80,443} flags SA/SA divert-packet port 989 no state
pass in quick on em0 inet6 proto tcp from <zapret6> port {80,443} no state
pass out quick on em0 inet6 proto tcp to <zapret6> port {80,443} divert-packet port 989 no state
pass in quick on em0 inet6 proto tcp from <zapret6-user> port {80,443} no state

6
docs/bsdfw.txt
View File

@ -27,9 +27,10 @@ ipfw add 100 fwd ::1,988 tcp from any to any 80,443 proto ip6 recv em1
ipfw delete 100
ipfw add 100 divert 989 tcp from any to any 80,443 out not diverted not sockarg xmit em0
; required for autottl mode
ipfw add 100 divert 989 tcp from any 80,443 to any tcpflags syn,ack in recv em0
; udp
ipfw add 100 divert 989 udp from any to any 443 out not diverted not sockarg xmit em0
# this is required for autottl but very bad, all incoming traffic will be diverted, no way to limit like in linux (connbytes)
ipfw add 100 divert 989 tcp from any 80,443 to any in not diverted not sockarg recv em0
ipfw delete 100
ipfw add 100 allow tcp from me to table\(nozapret\) 80,443
@ -71,6 +72,7 @@ pfctl -f /etc/pf.conf
; dvtws works both for routed and local
pass in quick on em0 proto tcp from port {80,443} flags SA/SA divert-packet port 989 no state
pass in quick on em0 proto tcp from port {80,443} no state
pass out quick on em0 proto tcp to port {80,443} divert-packet port 989 no state
pfctl -f /etc/pf.conf