Ssh
通過 Mikrotik NAT 的 SSH 失敗
我的網路上有一台伺服器，我想將其公開給外部 SSH 連接。我可以從我的網路直接 ssh 到設備（例如
ssh 192.168.88.162工作正常）。我設置了一個 NAT 規則，以便到 17722 的連接重新路由到 22。但是這失敗了：PS C:\Users\Me> ssh -vvv -i .\.ssh\id_rsa -p 17722 me@160.119.XXX.XXX OpenSSH_for_Windows_8.1p1, LibreSSL 3.0.2 debug1: Reading configuration data C:\\Users\\Me/.ssh/config debug3: Failed to open file:C:/ProgramData/ssh/ssh_config error:2 debug2: resolve_canonicalize: hostname 160.119.XXX.XXX is address debug2: ssh_connect_direct debug1: Connecting to 160.119.XXX.XXX [160.119.XXX.XXX] port 17722. debug3: finish_connect - ERROR: async io completed with error: 10060, io:00000222C310DC10 debug1: connect to address 160.119.XXX.XXX port 17722: Connection timed out ssh: connect to host 160.119.XXX.XXX port 17722: Connection timed out如何從外部 IP 工作中獲取 ssh？
伺服器上的 tcpdump 顯示：
me@JanJansen:~ $ grep 64236 tcpdump 22:13:56.097727 IP 192.168.88.177.64236 > 192.168.88.162.ssh: Flags [S], seq 3490646443, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0 22:13:56.098213 IP 192.168.88.162.ssh > 192.168.88.177.64236: Flags [S.], seq 869880002, ack 3490646444, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 6], length 0 22:13:57.105046 IP 192.168.88.177.64236 > 192.168.88.162.ssh: Flags [S], seq 3490646443, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0 22:13:57.105398 IP 192.168.88.162.ssh > 192.168.88.177.64236: Flags [S.], seq 869880002, ack 3490646444, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 6], length 0 22:13:58.162258 IP 192.168.88.162.ssh > 192.168.88.177.64236: Flags [S.], seq 869880002, ack 3490646444, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 6], length 0 22:13:59.117541 IP 192.168.88.177.64236 > 192.168.88.162.ssh: Flags [S], seq 3490646443, win 64240, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0 22:13:59.117912 IP 192.168.88.162.ssh > 192.168.88.177.64236: Flags [S.], seq 869880002, ack 3490646444, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 6], length 0 22:14:01.122237 IP 192.168.88.162.ssh > 192.168.88.177.64236: Flags [S.], seq 869880002, ack 3490646444, win 64240, options [mss 1460,nop,nop,sackOK,nop,wscale 6], length 0與本地 ssh 相比，它有很多**$$ P $$旗幟，不是$$ S $$**，這是我看到的最大區別，但我不知道如何對此採取行動。
對於它的價值，我可以看到有效的 NAT 規則。路由器配置如下：
# oct/04/2021 23:17:07 by RouterOS 6.47.4 # software id = VBLW-UG4R # # model = 951Ui-2HnD # serial number = B8710C65021A /interface bridge add admin-mac=48:8F:5A:79:92:71 auto-mac=no comment=defconf name=bridge /interface wireless set [ find default-name=wlan1 ] mode=ap-bridge ssid=MikroTik wireless-protocol=802.11 /interface pppoe-client add add-default-route=yes disabled=no interface=ether5 name=pppoe-out1 use-peer-dns=yes user=gkruger@websquad.co.za /interface list add comment=defconf name=WAN add comment=defconf name=LAN /interface wireless security-profiles set [ find default=yes ] supplicant-identity=MikroTik /ip pool add name=dhcp ranges=192.168.88.10-192.168.88.254 /ip dhcp-server add address-pool=dhcp disabled=no interface=bridge lease-time=12h name=defconf /interface bridge port add bridge=bridge comment=defconf interface=ether2 add bridge=bridge comment=defconf interface=ether3 add bridge=bridge comment=defconf interface=ether4 add bridge=bridge comment=defconf interface=wlan1 /ip neighbor discovery-settings set discover-interface-list=LAN /interface list member add comment=defconf interface=bridge list=LAN add comment=defconf interface=ether1 list=WAN add interface=pppoe-out1 list=WAN /ip address add address=192.168.88.1/24 comment=defconf interface=ether2 network=192.168.88.0 /ip arp add address=192.168.88.162 comment=JanJansen interface=bridge mac-address=00:0F:13:39:20:33 add address=192.168.88.177 comment=Sarevok interface=bridge mac-address=40:8D:5C:58:C0:97 add address=192.168.88.202 interface=bridge mac-address=32:63:2A:49:58:D9 add address=192.168.88.101 interface=bridge mac-address=18:56:80:24:47:12 /ip cloud set ddns-enabled=yes /ip dhcp-client add comment=defconf interface=ether1 /ip dhcp-server network add address=192.168.88.0/24 comment=defconf gateway=192.168.88.1 /ip dns set allow-remote-requests=yes /ip dns static add address=192.168.88.1 comment=defconf name=router.lan /ip firewall filter add action=accept chain=input comment="defconf: accept established,related,untracked" connection-state=established,related,untracked add action=drop chain=input comment="defconf: drop invalid" connection-state=invalid add action=accept chain=input comment="defconf: accept ICMP" protocol=icmp add action=accept chain=input comment="defconf: accept to local loopback (for CAPsMAN)" dst-address=127.0.0.1 add action=drop chain=input comment="defconf: drop all not coming from LAN" in-interface-list=!LAN add action=accept chain=forward comment="defconf: accept in ipsec policy" ipsec-policy=in,ipsec add action=accept chain=forward comment="defconf: accept out ipsec policy" ipsec-policy=out,ipsec add action=fasttrack-connection chain=forward comment="defconf: fasttrack" connection-state=established,related add action=accept chain=forward comment="defconf: accept established,related, untracked" connection-state=established,related,untracked add action=drop chain=forward comment="defconf: drop invalid" connection-state=invalid add action=drop chain=forward comment="defconf: drop all from WAN not DSTNATed" connection-nat-state=!dstnat connection-state=new in-interface-list=WAN add action=accept chain=forward comment="Outside SSH" dst-port=22 log=yes protocol=tcp /ip firewall nat add action=masquerade chain=srcnat comment="defconf: masquerade" ipsec-policy=out,none out-interface-list=WAN add action=dst-nat chain=dstnat comment=JanJansen dst-port=17722 in-interface=bridge log=yes protocol=tcp to-addresses=192.168.88.162 to-ports=22 /ipv6 firewall address-list add address=::/128 comment="defconf: unspecified address" list=bad_ipv6 add address=::1/128 comment="defconf: lo" list=bad_ipv6 add address=fec0::/10 comment="defconf: site-local" list=bad_ipv6 add address=::ffff:0.0.0.0/96 comment="defconf: ipv4-mapped" list=bad_ipv6 add address=::/96 comment="defconf: ipv4 compat" list=bad_ipv6 add address=100::/64 comment="defconf: discard only " list=bad_ipv6 add address=2001:db8::/32 comment="defconf: documentation" list=bad_ipv6 add address=2001:10::/28 comment="defconf: ORCHID" list=bad_ipv6 add address=3ffe::/16 comment="defconf: 6bone" list=bad_ipv6 add address=::224.0.0.0/100 comment="defconf: other" list=bad_ipv6 add address=::127.0.0.0/104 comment="defconf: other" list=bad_ipv6 add address=::/104 comment="defconf: other" list=bad_ipv6 add address=::255.0.0.0/104 comment="defconf: other" list=bad_ipv6 /ipv6 firewall filter add action=accept chain=input comment="defconf: accept established,related,untracked" connection-state=established,related,untracked add action=drop chain=input comment="defconf: drop invalid" connection-state=invalid add action=accept chain=input comment="defconf: accept ICMPv6" protocol=icmpv6 add action=accept chain=input comment="defconf: accept UDP traceroute" port=33434-33534 protocol=udp add action=accept chain=input comment="defconf: accept DHCPv6-Client prefix delegation." dst-port=546 protocol=udp src-address=fe80::/10 add action=accept chain=input comment="defconf: accept IKE" dst-port=500,4500 protocol=udp add action=accept chain=input comment="defconf: accept ipsec AH" protocol=ipsec-ah add action=accept chain=input comment="defconf: accept ipsec ESP" protocol=ipsec-esp add action=accept chain=input comment="defconf: accept all that matches ipsec policy" ipsec-policy=in,ipsec add action=drop chain=input comment="defconf: drop everything else not coming from LAN" in-interface-list=!LAN add action=accept chain=forward comment="defconf: accept established,related,untracked" connection-state=established,related,untracked add action=drop chain=forward comment="defconf: drop invalid" connection-state=invalid add action=drop chain=forward comment="defconf: drop packets with bad src ipv6" src-address-list=bad_ipv6 add action=drop chain=forward comment="defconf: drop packets with bad dst ipv6" dst-address-list=bad_ipv6 add action=drop chain=forward comment="defconf: rfc4890 drop hop-limit=1" hop-limit=equal:1 protocol=icmpv6 add action=accept chain=forward comment="defconf: accept ICMPv6" protocol=icmpv6 add action=accept chain=forward comment="defconf: accept HIP" protocol=139 add action=accept chain=forward comment="defconf: accept IKE" dst-port=500,4500 protocol=udp add action=accept chain=forward comment="defconf: accept ipsec AH" protocol=ipsec-ah add action=accept chain=forward comment="defconf: accept ipsec ESP" protocol=ipsec-esp add action=accept chain=forward comment="defconf: accept all that matches ipsec policy" ipsec-policy=in,ipsec add action=drop chain=forward comment="defconf: drop everything else not coming from LAN" in-interface-list=!LAN /system clock set time-zone-name=Africa/Johannesburg /tool mac-server set allowed-interface-list=LAN /tool mac-server mac-winbox set allowed-interface-list=LAN
在 router.config 的第 64 行：
/ip firewall nat add action=dst-nat chain=dstnat comment=JanJansen dst-port=17722 in-interface=bridge log=yes protocol=tcp to-addresses=192.168.88.162 to-ports=22
dst-nat應該對來自您的 WAN 的數據包起作用；因此上面的界面不應該是in-interface=ether1而不是bridge？我假設ether1是您的 WAN 連接的位置。