How do I Rewrite URL's in NGINX server block?

I still have some issues with my server block:

server   {

   server_name www.chowchowbath.com;
   root /var/www/ghost/;
   rewrite  ^/(.*)$  http://chowchowbath.com/$1 permanent;
   
   }  

server {
    listen 80;
 server_name  chowchowbath.com;

	root /var/www/ghost/;
	
   rewrite ^/2006/12/01/the-year-you-were-born-part-one/ http://www.thebangaloreblog.com/2006/11/the-year-you-were-born-part-one.html permanent;    
  }

so everything redirects from www to non www in the first server block. additionally in the second block, the url specified also redirects to the bangalore blog. but however anything else i had on http://chowchowbath.com/<blog-post-url> says 404 page and does not show up whats there. What am i missing here?

As mentioned in Nginx pitfalls, rewrite regexes can slow things down. To redirect http traffic to https, you should use a 301 Moved Permanently redirect instead:

server {
    listen         80;
    return 301 https://www.wknet.se$request_uri;
}

server {
    listen         443;
    server_name www.wknet.se;
    ...

trying to when change /client/BigBlueButton.html portion of the URL according to - http://docs.bigbluebutton.org/support/faq.html#how-do-i-change-the-client-bigbluebutton-html-portion-of-the-url,

but getting -

code

my /etc/bigbluebutton/nginx/client.nginx:

#location /client/BigBlueButton.html {
#    root /home/firstuser/dev/bigbluebutton/bigbluebutton-client;
#    index index.html index.htm;
#    expires 1m;
#}

# BigBlueButton Flash client.
location /client {
root /home/firstuser/dev/bigbluebutton/bigbluebutton-client;
index index.html index.htm;
}
code

my /etc/bigbluebutton/nginx/rewrite.nginx:

location /client/BigBlueButton.html {
    rewrite ^ /conference permanent;
}

location /conference {
    alias  /var/www/bigbluebutton/client;
    index BigBlueButton.html;
    expires 1m;
}
code

$sudo /etc/init.d/nginx restart

/var/log/nginx/bigbluebutton.access.log

33.126.263.65 - - [16/Aug/2015:12:37:57 -0400] "GET / HTTP/1.1" 200 2852 "-" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
33.126.263.65 - - [16/Aug/2015:12:37:57 -0400] "GET /css/bijou.min.css HTTP/1.1" 200 2753 "http://M_IP_Ad/" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
33.126.263.65 - - [16/Aug/2015:12:37:57 -0400] "GET /css/style.css HTTP/1.1" 200 2918 "http://M_IP_Ad/" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
33.126.263.65 - - [16/Aug/2015:12:37:57 -0400] "GET /css/font-awesome.min.css HTTP/1.1" 200 20766 "http://M_IP_Ad/" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
33.126.263.65 - - [16/Aug/2015:12:37:57 -0400] "GET /images/jimtalk-logo.png HTTP/1.1" 200 10251 "http://M_IP_Ad/" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
33.126.263.65 - - [16/Aug/2015:12:37:57 -0400] "GET /images/bbb-setup-audio.jpg HTTP/1.1" 200 18876 "http://M_IP_Ad/" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
33.126.263.65 - - [16/Aug/2015:12:37:57 -0400] "GET /images/bbb-viewer-overview.jpg HTTP/1.1" 200 21929 "http://M_IP_Ad/" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
33.126.263.65 - - [16/Aug/2015:12:37:57 -0400] "GET /images/bbb-presenter-overview.jpg HTTP/1.1" 200 18309 "http://M_IP_Ad/" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
33.126.263.65 - - [16/Aug/2015:12:37:58 -0400] "GET /fonts/fontawesome-webfont.woff?v=4.1.0 HTTP/1.1" 200 83760 "http://M_IP_Ad/css/font-awesome.min.css" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
M_IP_Ad - - [16/Aug/2015:12:38:00 -0400] "POST /bigbluebutton/api/create?name=Demo+Meeting&meetingID=Demo+Meeting&voiceBridge=72274&attendeePW=ap&moderatorPW=mp&record=false&checksum=a93ab8433532c633ab2467afc0d91e0eb1dc4e88 HTTP/1.1" 200 488 "-" "Java/1.7.0_79"
33.126.263.65 - - [16/Aug/2015:12:38:00 -0400] "GET /demo/demo1.jsp?username=%D7%99%D7%A2%D7%99%D7%A2%D7%99&action=create HTTP/1.1" 200 1003 "http://M_IP_Ad/" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
33.126.263.65 - - [16/Aug/2015:12:38:01 -0400] "GET /bigbluebutton/api/join?meetingID=Demo+Meeting&fullName=%D7%99%D7%A2%D7%99%D7%A2%D7%99&password=mp&checksum=3438ed39a50723be59798038f86fcba0af30b325 HTTP/1.1" 302 0 "http://M_IP_Ad/demo/demo1.jsp?username=%D7%99%D7%A2%D7%99%D7%A2%D7%99&action=create" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
33.126.263.65 - - [16/Aug/2015:12:38:02 -0400] "GET /client/BigBlueButton.html HTTP/1.1" 301 193 "http://M_IP_Ad/demo/demo1.jsp?username=%D7%99%D7%A2%D7%99%D7%A2%D7%99&action=create" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
33.126.263.65 - - [16/Aug/2015:12:38:02 -0400] "GET /conference HTTP/1.1" 301 193 "http://M_IP_Ad/demo/demo1.jsp?username=%D7%99%D7%A2%D7%99%D7%A2%D7%99&action=create" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
33.126.263.65 - - [16/Aug/2015:12:38:02 -0400] "GET /conference/ HTTP/1.1" 403 208 "http://M_IP_Ad/demo/demo1.jsp?username=%D7%99%D7%A2%D7%99%D7%A2%D7%99&action=create" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
code

Thank you