Lab 12.2
Hi,
I exercised Lab.12.2 today and found that the Lab didn't work for me at first .
From secondary machine , I did;# nc main.example.com 80
but received the message like;
[student@secondary Desktop]$ nc main 80 GET / HTTP/1.1 Host: foo.example.com Referrer: secondary.example.com User-Agent: test-browser HTTP/1.1 400 Bad Request Date: Sun, 04 Jul 2021 08:16:35 GMT Server: Apache/2.4.37 (centos) Content-Length: 226 Connection: close Content-Type: text/html; charset=iso-8859-1 <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <html><head> <title>400 Bad Request</title> </head><body> Bad Request Your browser sent a request that this server could not understand.
The main machine (httpd works) says;
10.0.2.20 - - [04/Jul/2021:17:16:35 +0900] "GET / HTTP/1.1\n" 400 226 "-" "-"
The problem is unnecessary "\n"
so I excuted netcat with the option "-C" and works well
[student@secondary Desktop]$ nc -C main 80 GET / HTTP/1.1 Host: foo.example.com Referrer: secondary.example.com User-Agent: test-browser HTTP/1.1 200 OK Date: Sun, 04 Jul 2021 08:20:51 GMT Server: Apache/2.4.37 (centos) Last-Modified: Sat, 15 May 2021 23:48:43 GMT ETag: "14-5c26700209e14" Accept-Ranges: bytes Content-Length: 20 Content-Type: text/html; charset=UTF-8 The test page works
Thanks.
Comments
-
Thank you for posting the issue.
I can confirm the problem was duplicated and a change to the lab will be submitted.I also found that typing too slowly will trigger a timeout condition. To avoid the timeout create a file with the commands and pipe the file into the nc command.
My file:
[root@sec ~]# cat 12.2.cmds
GET / HTTP/1.1
Host: node.example.com
Referrer: foo.example.com
User-Agent: test-browserThe command becomes:
$sudo echo 12.2.cmds | nc -C main.example.com 80
Thank you for your input.
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