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0

what does it mean if I have lines like this in nginx access log?

63.144.XX.XX - - [22/Mar/2019:22:06:22 +0000] "-" 400 0 "-" "-" 39.954 example.com:443

(Obviously the domain is not really example.com)

If it would be obviously invalid request, it wouldn't took 40 seconds to realize it wouldn't it?

nginx version: nginx/1.2.1

log_format full '$remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent" $request_time $host:$server_port';

The configuration is quite long but mostly proxy_pass to ruby unicorn server on another machine(s).

EDIT: I've also found lines with error 408. THAT one is easier to explain - it's timeout on reading client request, possibly related to tcp pre-connect.

https://airbrake.io/blog/http-errors/408-request-timeout

https://www.keycdn.com/support/408-request-timeout

https://www.haproxy.com/blog/haproxy-and-http-errors-408-in-chrome/

Is it possible the 400 is also caused by something similar? Can it be fixed in some way? Or is that just coincidence?

nginx

share|improve this question

edited Mar 23 at 8:48

Honza

asked Mar 23 at 0:44

HonzaHonza

1475

add a comment | 

0

what does it mean if I have lines like this in nginx access log?

63.144.XX.XX - - [22/Mar/2019:22:06:22 +0000] "-" 400 0 "-" "-" 39.954 example.com:443

(Obviously the domain is not really example.com)

If it would be obviously invalid request, it wouldn't took 40 seconds to realize it wouldn't it?

nginx version: nginx/1.2.1

log_format full '$remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent" $request_time $host:$server_port';

The configuration is quite long but mostly proxy_pass to ruby unicorn server on another machine(s).

EDIT: I've also found lines with error 408. THAT one is easier to explain - it's timeout on reading client request, possibly related to tcp pre-connect.

https://airbrake.io/blog/http-errors/408-request-timeout

https://www.keycdn.com/support/408-request-timeout

https://www.haproxy.com/blog/haproxy-and-http-errors-408-in-chrome/

Is it possible the 400 is also caused by something similar? Can it be fixed in some way? Or is that just coincidence?

nginx

share|improve this question

edited Mar 23 at 8:48

Honza

asked Mar 23 at 0:44

HonzaHonza

1475

add a comment | 

what does it mean if I have lines like this in nginx access log?

63.144.XX.XX - - [22/Mar/2019:22:06:22 +0000] "-" 400 0 "-" "-" 39.954 example.com:443

(Obviously the domain is not really example.com)

If it would be obviously invalid request, it wouldn't took 40 seconds to realize it wouldn't it?

nginx version: nginx/1.2.1

log_format full '$remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent" $request_time $host:$server_port';

The configuration is quite long but mostly proxy_pass to ruby unicorn server on another machine(s).

EDIT: I've also found lines with error 408. THAT one is easier to explain - it's timeout on reading client request, possibly related to tcp pre-connect.

https://airbrake.io/blog/http-errors/408-request-timeout

https://www.keycdn.com/support/408-request-timeout

https://www.haproxy.com/blog/haproxy-and-http-errors-408-in-chrome/

Is it possible the 400 is also caused by something similar? Can it be fixed in some way? Or is that just coincidence?

nginx

share|improve this question

edited Mar 23 at 8:48

Honza

asked Mar 23 at 0:44

HonzaHonza

1475

63.144.XX.XX - - [22/Mar/2019:22:06:22 +0000] "-" 400 0 "-" "-" 39.954 example.com:443

share|improve this question

edited Mar 23 at 8:48

Honza

asked Mar 23 at 0:44

HonzaHonza

1475

share|improve this question

edited Mar 23 at 8:48

Honza

asked Mar 23 at 0:44

HonzaHonza

1475

asked Mar 23 at 0:44

HonzaHonza

1475

asked Mar 23 at 0:44

HonzaHonza

1475