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Posted to notifications@apisix.apache.org by GitBox <gi...@apache.org> on 2020/02/23 07:38:02 UTC

[GitHub] [incubator-apisix] shunsheng-github opened a new issue #1152: request help: fail to mqtt-proxy request

shunsheng-github opened a new issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152
 
 
   ### Issue description
   按照示例设置路由，已设置TCP 9100端口：
   
   curl http://xx.xx.xx.xx:9180/apisix/admin/stream_routes/102 -X PUT -d '
   {
       "remote_addr": "127.0.0.1",
       "plugins": {
           "mqtt-proxy": {
               "protocol_name": "MQTT",
               "protocol_level": 4,
               "upstream": {
                   "ip": "xx.xx.xx.xx",
                   "port": 9100
               }
           }
       }
   }'
   
   mqtt测试工具访问:tcp://xx.xx.xx.xx:9100，连接不上，查看日志：
   2020/02/23 14:33:05 [error] 30513#30513: *4327463 lua entry thread aborted: runtime error: /usr/local/apisix/lua/apisix/stream/router/ip_port.lua:31: attempt to index local 'route' (a boolean value)
   stack traceback:
   coroutine 0:
   	/usr/local/apisix/lua/apisix/stream/router/ip_port.lua: in function 'match_opts'
   	/usr/local/apisix/lua/apisix/stream/router/ip_port.lua:60: in function 'match'
   	/usr/local/apisix/lua/apisix.lua:521: in function 'stream_preread_phase'
   	preread_by_lua(nginx.conf:51):2: in main chunk while prereading client data, client: 192.168.221.151, server: 0.0.0.0:9100
   
   ### Environment
   
   * apisix version (cmd: `apisix version`):1.0
   * OS:redhat7.6
   

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[GitHub] [incubator-apisix] shunsheng-github edited a comment on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
shunsheng-github edited a comment on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-590903371
 
 
   原始mqtt服务器连接：
   ![image](https://user-images.githubusercontent.com/61373502/75256877-1d7a3480-581f-11ea-900e-b9092af765ef.png)
   apisix服务器路由配置：
   curl http://10.97.1.84:9180/apisix/admin/stream_routes/103 -X PUT -d '
   {
       "remote_addr": "127.0.0.1",
       "plugins": {
           "mqtt-proxy": {
               "protocol_name": "MQTT",
               "protocol_level": 4,
               "upstream": {
                   "ip": "192.168.209.243",
                   "port": 1883
               }
           }
       }
   }'
   ![image](https://user-images.githubusercontent.com/61373502/75257045-5b775880-581f-11ea-97d2-9f28253c8c2b.png)
   这里是tcp://IP:9100是连接不成功，并且日志错误还是这个错误：
   2020/02/25 22:30:58 [error] 30514#30514: *15072954 lua entry thread aborted: runtime error: /usr/local/apisix/lua/apisix/stream/router/ip_port.lua:31: attempt to index local 'route' (a boolean value)
   stack traceback:
   coroutine 0:
   	/usr/local/apisix/lua/apisix/stream/router/ip_port.lua: in function 'match_opts'
   	/usr/local/apisix/lua/apisix/stream/router/ip_port.lua:60: in function 'match'
   	/usr/local/apisix/lua/apisix.lua:521: in function 'stream_preread_phase'
   	preread_by_lua(nginx.conf:51):2: in main chunk while prereading client data, client: 192.168.221.136, server: 0.0.0.0:9100
   从配置来看应该是tcp://IP:9100，事实上通过9100端口是连接不上apisix服务器。上面的测试用例没看到应用端是怎么连接apisix服务器的，不太理解这个stream route调用方式。
   换了另一台服务器后：做同样的动作，tcp://10.97.1.83:9100，同样连接不上，日志如下：
   192.168.221.167 - - [26/Feb/2020:08:42:23 +0800] - "\x10#\x00\x04MQTT\x04\x02\x00<\x00\x17paho1582677649626000002" 400 154 0.006 "-" "-" - - -
   192.168.221.167 - - [26/Feb/2020:08:42:23 +0800] - "\x10%\x00\x06MQIsdp\x03\x02\x00<\x00\x17paho1582677649626000002" 400 154 0.007 "-" "-" - - -

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[GitHub] [incubator-apisix] JohannT9527 commented on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
JohannT9527 commented on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-594411307
 
 
   你好，这个问题解决了吗？我遇到了跟你一模一样的问题。

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[GitHub] [incubator-apisix] shunsheng-github commented on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
shunsheng-github commented on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-590903371
 
 
   原始mqtt服务器连接：
   ![image](https://user-images.githubusercontent.com/61373502/75256877-1d7a3480-581f-11ea-900e-b9092af765ef.png)
   apisix服务器路由配置：
   curl http://10.97.1.84:9180/apisix/admin/stream_routes/103 -X PUT -d '
   {
       "remote_addr": "127.0.0.1",
       "plugins": {
           "mqtt-proxy": {
               "protocol_name": "MQTT",
               "protocol_level": 4,
               "upstream": {
                   "ip": "192.168.209.243",
                   "port": 1883
               }
           }
       }
   }'
   ![image](https://user-images.githubusercontent.com/61373502/75257045-5b775880-581f-11ea-97d2-9f28253c8c2b.png)
   这里是tcp://IP:9100是连接不成功，并且日志错误还是这个错误：
   2020/02/25 22:30:58 [error] 30514#30514: *15072954 lua entry thread aborted: runtime error: /usr/local/apisix/lua/apisix/stream/router/ip_port.lua:31: attempt to index local 'route' (a boolean value)
   stack traceback:
   coroutine 0:
   	/usr/local/apisix/lua/apisix/stream/router/ip_port.lua: in function 'match_opts'
   	/usr/local/apisix/lua/apisix/stream/router/ip_port.lua:60: in function 'match'
   	/usr/local/apisix/lua/apisix.lua:521: in function 'stream_preread_phase'
   	preread_by_lua(nginx.conf:51):2: in main chunk while prereading client data, client: 192.168.221.136, server: 0.0.0.0:9100
   从配置来看应该是tcp://IP:9100，事实上通过9100端口是连接不上apisix服务器。上面的测试用例没看到应用端是怎么连接apisix服务器的，不太理解这个stream route调用方式。

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[GitHub] [incubator-apisix] shunsheng-github removed a comment on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
shunsheng-github removed a comment on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-590186454
 
 
   抓到文件了，分析一下吧。
   
   
   

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[GitHub] [incubator-apisix] membphis commented on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
membphis commented on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-590036852
 
 
   Can you provide the original TCP request packet? We can get it through tcpdump.

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[GitHub] [incubator-apisix] membphis commented on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
membphis commented on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-590135005
 
 
   @shunsheng-github `tcpdump  port 50051 -w b.pcap`
   
   I need to confirm the raw TCP data.

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[GitHub] [incubator-apisix] shunsheng-github commented on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
shunsheng-github commented on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-590187272
 
 
   抓包文件了
   [b.zip](https://github.com/apache/incubator-apisix/files/4243358/b.zip)
   
   

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[GitHub] [incubator-apisix] shunsheng-github edited a comment on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
shunsheng-github edited a comment on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-590186454
 
 
   抓到文件了，分析一下吧。
   
   
   

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[GitHub] [incubator-apisix] membphis commented on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
membphis commented on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-594459921
 
 
   https://github.com/apache/incubator-apisix/blob/master/lua/apisix/stream/router/ip_port.lua#L43
   
   I think the latest APISIX has resolved this bug. please use the latest version and make a try.
   

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[GitHub] [incubator-apisix] shunsheng-github edited a comment on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
shunsheng-github edited a comment on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-590903371
 
 
   原始mqtt服务器连接：
   ![image](https://user-images.githubusercontent.com/61373502/75256877-1d7a3480-581f-11ea-900e-b9092af765ef.png)
   apisix服务器路由配置：
   
   ```
   curl http://10.97.1.84:9180/apisix/admin/stream_routes/103 -X PUT -d '
   {
       "remote_addr": "127.0.0.1",
       "plugins": {
           "mqtt-proxy": {
               "protocol_name": "MQTT",
               "protocol_level": 4,
               "upstream": {
                   "ip": "192.168.209.243",
                   "port": 1883
               }
           }
       }
   }'
   ```
   
   ![image](https://user-images.githubusercontent.com/61373502/75257045-5b775880-581f-11ea-97d2-9f28253c8c2b.png)
   这里是tcp://IP:9100是连接不成功，并且日志错误还是这个错误：
   2020/02/25 22:30:58 [error] 30514#30514: *15072954 lua entry thread aborted: runtime error: /usr/local/apisix/lua/apisix/stream/router/ip_port.lua:31: attempt to index local 'route' (a boolean value)
   stack traceback:
   coroutine 0:
   	/usr/local/apisix/lua/apisix/stream/router/ip_port.lua: in function 'match_opts'
   	/usr/local/apisix/lua/apisix/stream/router/ip_port.lua:60: in function 'match'
   	/usr/local/apisix/lua/apisix.lua:521: in function 'stream_preread_phase'
   	preread_by_lua(nginx.conf:51):2: in main chunk while prereading client data, client: 192.168.221.136, server: 0.0.0.0:9100
   从配置来看应该是tcp://IP:9100，事实上通过9100端口是连接不上apisix服务器。上面的测试用例没看到应用端是怎么连接apisix服务器的，不太理解这个stream route调用方式。
   换了另一台服务器后：做同样的动作，tcp://10.97.1.83:9100，同样连接不上，日志如下：
   192.168.221.167 - - [26/Feb/2020:08:42:23 +0800] - "\x10#\x00\x04MQTT\x04\x02\x00<\x00\x17paho1582677649626000002" 400 154 0.006 "-" "-" - - -
   192.168.221.167 - - [26/Feb/2020:08:42:23 +0800] - "\x10%\x00\x06MQIsdp\x03\x02\x00<\x00\x17paho1582677649626000002" 400 154 0.007 "-" "-" - - -

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[GitHub] [incubator-apisix] shunsheng-github commented on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
shunsheng-github commented on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-590186454
 
 
   抓到文件了，分析一下吧。
   
   

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[GitHub] [incubator-apisix] membphis commented on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
membphis commented on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-591246134
 
 
   @shunsheng-github 
   
   ``` shell
   $ curl http://10.97.1.84:9180/apisix/admin/stream_routes/103 -X PUT -d '
   {
       "remote_addr": "127.0.0.1",                    # this maybe wrong
       "plugins": {
           "mqtt-proxy": {
               "protocol_name": "MQTT",
               "protocol_level": 4,
               "upstream": {
                   "ip": "192.168.209.243",
                   "port": 1883
               }
           }
       }
   }'
   ```
   
   The `remote_addr` means the IP address of request client.
   I found that you are sending the request from your Windows local computer.
   So the `remote_addr` should be the IP address of your local machine. 

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[GitHub] [incubator-apisix] shunsheng-github commented on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
shunsheng-github commented on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-591268560
 
 
   curl http://10.97.1.38:9180/apisix/admin/stream_routes/105 -X PUT -d '
   {
       "plugins": {
           "mqtt-proxy": {
               "protocol_name": "MQTT",
               "protocol_level": 4,
               "upstream": {
                   "ip": "192.168.209.243",
                   "port": 1883
               }
           }
       }
   }'
   配置以上，日志显示：
   2020/02/26 14:33:57 [warn] 2610#2610: *24510069 stream [lua] mqtt-proxy.lua:116: phase_fun(): plugin rewrite phase, conf: {"protocol_level":4,"upstream":{"ip":"192.168.209.243","port":1883},"protocol_name":"MQTT"} while prereading client data, client: 192.168.221.149, server: 0.0.0.0:9100
   配置客户端地址：
   curl http://10.97.1.38:9180/apisix/admin/stream_routes/105 -X PUT -d '
   {
       "remote_addr": "192.168.221.149",
       "plugins": {
           "mqtt-proxy": {
               "protocol_name": "MQTT",
               "protocol_level": 4,
               "upstream": {
                   "ip": "192.168.209.243",
                   "port": 1883
               }
           }
       }
   }'
   日志报错：
   2020/02/26 14:36:36 [error] 2608#2608: *24526987 lua entry thread aborted: runtime error: /usr/local/apisix/lua/apisix/stream/router/ip_port.lua:31: attempt to index local 'route' (a boolean value)
   stack traceback:
   coroutine 0:
   	/usr/local/apisix/lua/apisix/stream/router/ip_port.lua: in function 'match_opts'
   	/usr/local/apisix/lua/apisix/stream/router/ip_port.lua:60: in function 'match'
   	/usr/local/apisix/lua/apisix.lua:521: in function 'stream_preread_phase'
   	preread_by_lua(nginx.conf:51):2: in main chunk while prereading client data, client: 192.168.221.149, server: 0.0.0.0:9100
   以上均连接不成功。还有对于mqtt来说，任何一个终端都会连接mqtt服务器，那么"remote_addr"这个参数作用是什么？

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[GitHub] [incubator-apisix] membphis commented on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
membphis commented on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-590278476
 
 
   I used your raw TCP data, it works fine. Here is the test case.
   
   I think Apache APISIX can support your MQTT data, and it has forward your data to upstream. please confirm your upstream status is fine.
   
   ```
   === TEST 1: set route(id: 1)
   --- config
       location /t {
           content_by_lua_block {
               local t = require("lib.test_admin").test
               local code, body = t('/apisix/admin/stream_routes/1',
                   ngx.HTTP_PUT,
                   [[{
                       "remote_addr": "127.0.0.1",
                       "plugins": {
                           "mqtt-proxy": {
                               "protocol_name": "MQTT",
                               "protocol_level": 4,
                               "upstream": {
                                   "ip": "127.0.0.1",
                                   "port": 1995
                               }
                           }
                       }
                   }]]
                   )
   
               if code >= 300 then
                   ngx.status = code
               end
               ngx.say(body)
           }
       }
   --- request
   GET /t
   --- response_body
   passed
   --- no_error_log
   [error]
   
   
   
   === TEST 2: hit route
   --- stream_enable
   --- stream_request eval
   "\x10\x18\x00\x04\x4d\x51\x54\x54\x04\x06\x00\x3c\x00\x05\x31\x31\x31\x31\x31\x00\x03\x6c\x77\x74\x00\x00"
   --- stream_response
   hello world
   --- no_error_log
   [error]
   ```

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[GitHub] [incubator-apisix] shunsheng-github edited a comment on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
shunsheng-github edited a comment on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-590187272
 
 
   抓包文件：
   [b.zip](https://github.com/apache/incubator-apisix/files/4243358/b.zip)
   
   

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[GitHub] [incubator-apisix] shunsheng-github commented on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
shunsheng-github commented on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-590055510
 
 
   [root@slnewmestodidi ~]# tcpdump -iany tcp port 9100
   tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
   listening on any, link-type LINUX_SLL (Linux cooked), capture size 262144 bytes
   18:37:46.905664 IP 192.168.221.180.62468 > slnewmestodidi.jetdirect: Flags [S], seq 2199870113, win 64240, options [mss 1380,nop,wscale 8,nop,nop,sackOK], length 0
   18:37:46.905689 IP slnewmestodidi.jetdirect > 192.168.221.180.62468: Flags [S.], seq 1504317879, ack 2199870114, win 29200, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
   18:37:46.910910 IP 192.168.221.180.62468 > slnewmestodidi.jetdirect: Flags [.], ack 1, win 1024, length 0
   18:37:46.911071 IP slnewmestodidi.jetdirect > 192.168.221.180.62468: Flags [F.], seq 1, ack 1, win 229, length 0
   18:37:46.912288 IP 192.168.221.180.62468 > slnewmestodidi.jetdirect: Flags [P.], seq 1:27, ack 1, win 1024, length 26
   18:37:46.912304 IP slnewmestodidi.jetdirect > 192.168.221.180.62468: Flags [R], seq 1504317880, win 0, length 0
   18:37:46.917910 IP 192.168.221.180.62468 > slnewmestodidi.jetdirect: Flags [.], ack 2, win 1024, length 0
   18:37:46.917923 IP slnewmestodidi.jetdirect > 192.168.221.180.62468: Flags [R], seq 1504317881, win 0, length 0
   18:37:46.918576 IP 192.168.221.180.62468 > slnewmestodidi.jetdirect: Flags [F.], seq 27, ack 2, win 1024, length 0
   18:37:46.918583 IP slnewmestodidi.jetdirect > 192.168.221.180.62468: Flags [R], seq 1504317881, win 0, length 0
   18:37:46.919911 IP 192.168.221.180.62469 > slnewmestodidi.jetdirect: Flags [S], seq 4042769846, win 64240, options [mss 1380,nop,wscale 8,nop,nop,sackOK], length 0
   18:37:46.919932 IP slnewmestodidi.jetdirect > 192.168.221.180.62469: Flags [S.], seq 3910564694, ack 4042769847, win 29200, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
   18:37:46.931580 IP 192.168.221.180.62469 > slnewmestodidi.jetdirect: Flags [.], ack 1, win 1024, length 0
   18:37:46.931610 IP 192.168.221.180.62469 > slnewmestodidi.jetdirect: Flags [P.], seq 1:29, ack 1, win 1024, length 28
   18:37:46.931619 IP slnewmestodidi.jetdirect > 192.168.221.180.62469: Flags [.], ack 29, win 229, length 0
   18:37:46.931706 IP slnewmestodidi.jetdirect > 192.168.221.180.62469: Flags [R.], seq 1, ack 29, win 229, length 0

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[GitHub] [incubator-apisix] membphis commented on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
membphis commented on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-591288009
 
 
   > 以上均连接不成功。还有对于mqtt来说，任何一个终端都会连接mqtt服务器，那么"remote_addr"这个参数作用是什么
   
   因为 mqtt-proxy 是四层负载均衡插件，对于路由的匹配只能使用客户端、服务端的 IP 地址 和 Port 端口。这里的 remote_addr 代表的就是客户端来源 IP 。
   
   Because `mqtt-proxy` is a Layer 4 load balancing plug-in, we can only use the client, server IP address and port for route matching.
   
   The `remote_addr` means the client source IP.

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[GitHub] [incubator-apisix] membphis closed issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
membphis closed issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152
 
 
   

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[GitHub] [incubator-apisix] shunsheng-github removed a comment on issue #1152: request help: fail to mqtt-proxy request

Posted by GitBox <gi...@apache.org>.
shunsheng-github removed a comment on issue #1152: request help: fail to mqtt-proxy  request
URL: https://github.com/apache/incubator-apisix/issues/1152#issuecomment-590055510
 
 
   [root@slnewmestodidi ~]# tcpdump -iany tcp port 9100
   tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
   listening on any, link-type LINUX_SLL (Linux cooked), capture size 262144 bytes
   18:37:46.905664 IP 192.168.221.180.62468 > slnewmestodidi.jetdirect: Flags [S], seq 2199870113, win 64240, options [mss 1380,nop,wscale 8,nop,nop,sackOK], length 0
   18:37:46.905689 IP slnewmestodidi.jetdirect > 192.168.221.180.62468: Flags [S.], seq 1504317879, ack 2199870114, win 29200, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
   18:37:46.910910 IP 192.168.221.180.62468 > slnewmestodidi.jetdirect: Flags [.], ack 1, win 1024, length 0
   18:37:46.911071 IP slnewmestodidi.jetdirect > 192.168.221.180.62468: Flags [F.], seq 1, ack 1, win 229, length 0
   18:37:46.912288 IP 192.168.221.180.62468 > slnewmestodidi.jetdirect: Flags [P.], seq 1:27, ack 1, win 1024, length 26
   18:37:46.912304 IP slnewmestodidi.jetdirect > 192.168.221.180.62468: Flags [R], seq 1504317880, win 0, length 0
   18:37:46.917910 IP 192.168.221.180.62468 > slnewmestodidi.jetdirect: Flags [.], ack 2, win 1024, length 0
   18:37:46.917923 IP slnewmestodidi.jetdirect > 192.168.221.180.62468: Flags [R], seq 1504317881, win 0, length 0
   18:37:46.918576 IP 192.168.221.180.62468 > slnewmestodidi.jetdirect: Flags [F.], seq 27, ack 2, win 1024, length 0
   18:37:46.918583 IP slnewmestodidi.jetdirect > 192.168.221.180.62468: Flags [R], seq 1504317881, win 0, length 0
   18:37:46.919911 IP 192.168.221.180.62469 > slnewmestodidi.jetdirect: Flags [S], seq 4042769846, win 64240, options [mss 1380,nop,wscale 8,nop,nop,sackOK], length 0
   18:37:46.919932 IP slnewmestodidi.jetdirect > 192.168.221.180.62469: Flags [S.], seq 3910564694, ack 4042769847, win 29200, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
   18:37:46.931580 IP 192.168.221.180.62469 > slnewmestodidi.jetdirect: Flags [.], ack 1, win 1024, length 0
   18:37:46.931610 IP 192.168.221.180.62469 > slnewmestodidi.jetdirect: Flags [P.], seq 1:29, ack 1, win 1024, length 28
   18:37:46.931619 IP slnewmestodidi.jetdirect > 192.168.221.180.62469: Flags [.], ack 29, win 229, length 0
   18:37:46.931706 IP slnewmestodidi.jetdirect > 192.168.221.180.62469: Flags [R.], seq 1, ack 29, win 229, length 0

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