When installing Magento 2.3.0 Strorefront and Admin URLs throw a 404 if "localhost" is used.

[ksurendra]

While installing (web setup) Magento 2.3.0, if we choose localhost, the URL's (Storefront and Admin) throw a 404 error messages. But if we choose 127.0.0.1, the URLs (Storefront and Admin) load without errors.

• Does not work:
  • http://localhost:8081/magento2/
  • http://locahost:8081/magento2/admin_2lecxk/
• Works:
  • http://127.0.0.1:8081/magento2/
  • http://127.0.0.1:8081/magento2/admin_2lecxk/

Please note using custom port 8081 and not 8080.

Preconditions (*)

1. macOS Mojave 10.14.2
2. Apache 2.4.37
3. PHP 7.2.9
4. MySQL 8.0

Steps to reproduce (*)

Part 1

1. Download a new copy of Magento 2.3.0 from https://magento.com/tech-resources/download choosing Magento Open Source 2.3.0 Wioth Sample Data.zip
2. Unzip and copy to Apache's htdocs folder
3. Give Write permissions recursively on the magento2 folder
4. Restart Apache
5. Install using http://localhost:<custom port>/magento2/setup
6. At 3rd step : Web Configuration, while entering "Your Store Address", use localhost (any custom port).
7. After install you will see the URLs to Storefront and Admin (as below).
8. Try accessing the Storefront and Admin URL's, they show 404/Not found
   

Part 2
9. Repeat above steps 1 to 5
10. At 3rd step : Web Configuration, while entering "Your Store Address", replace localhost with 127.0.0.1 (any custom port).
11. After install you will see the URLs to Storefront and Admin (as below).
12. Try accessing the Storefront and Admin URL's, they will load properly.

Expected result (*)

1. Storefront URL, if users choose localhost as http://locahost:<any port>/<store name> should load without 404 errors.
   

2. Admin URL, if users choose localhost as http://locahost:<any port>/<store name>/admin should load without 404 errors.
   

Actual result (*)

1. Storefront URL, if users chooses localhost as http://locahost:<any port>/<store name> should load without 404 errors.
   

2. Admin URL, if users chooses localhost as http://locahost:<any port>/<store name>/admin should load without 404 errors.

[magento-engcom-team]

Hi @ksurendra. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

• Summary of the issue
• Information on your environment
• Steps to reproduce
• Expected and actual results

Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

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where $VERSION is version tags (starting from 2.2.0+) or develop branches (for example: 2.3-develop).
For more details, please, review the Magento Contributor Assistant documentation.

@ksurendra do you confirm that you was able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

[magento-engcom-team]

Hi @cedarvinda. Thank you for working on this issue.
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[ksurendra]

@cedarvinda it took me more than 20 mins to write up the issue and strangely it closed in 13 mins. Was this tested on macOS Mojave? Apache? PHP 7.2?

Can you add some screenshots of localhost working for you?

[irajneeshgupta]

@ksurendra Hi, can you confirm that your host file is correct?

[ksurendra]

@irajneeshgupta Yes

My puzzle was that storefront & admin works with 127.0.0.1 but not with localhost. While all other pages/sites on apache work at localhost\xxx