Otdfbt

My organization has a server that is just for handling redirects of retired sites (redirects-myorg.org). We've just retired a website (widgets.org), and I am adding the retired site to our redirects server. About a week ago, we had the CNAME record for widgets.org changed so that it points to redirects-myorg.org.

Most of the URLs that were in circulation for widgets.org looked something like: widgets.org:8180/more/info. The 8180 port was explicitly included in the URL.

Success looks like:

• Typing widgets.org into a browser: redirects to blue-server.com.


• Typing widgets.org:8180 into a browser: redirects to purple-server.com

(For additional context: Three other sites' redirects are managed on this redirects server, and their configuration files reference ports 80 and 443. None of those sites use non-standard ports like 8180.)

Attempts

1.
I first set up the nginx configuration files to list to ports 80 and 8180 and return a 301 redirect on each:

server 
 listen 8180;
 listen [::]:8180;
 server_name widgets.org;
 return 301 https://purple-server.com;

server 
 listen 80;
 listen [::]:80;
 server_name widgets.org;
 return 301 https://blue-server.com;

Result:

• Typing widgets.org into a browser: redirects to blue-server.com. Good.


• Typing widgets.org:8180 into a browser: hangs and eventually times not. Not so good.

2.
Tried switching the order, unsuccessfully:

server 
 listen 80;
 listen [::]:80;
 server_name widgets.org;
 return 301 https://blue-server.com;

server 
 listen 8180;
 listen [::]:8180;
 server_name widgets.org;
 return 301 https://purple-server.com;

Result:

• Same as above.

3.
Tried tricking nginx, unsuccessfully:

server 
 listen 80;
 listen [::]:80;
 server_name widgets.org:8180;
 return 301 https://purple-server.com;

Result:

• Typing widgets.org into a browser: "Welcome to nginx!" page. Not so good.


• Typing widgets.org:8180 into a browser: hangs and eventually times not. Not so good.

4.
Tried tricking nginx a different way, unsuccessfully:

server 
 listen 80;
 listen [::]:80;
 server_name widgets.org;
 rewrite ^:8180.* https://purple-server.com break;
 return 301 https://blue-server.com;

Result:

• Typing widgets.org into a browser redirects to blue-server.com. Good.


• Typing widgets.org:8180 into a browser hangs and eventually times not. Not so good.