How to configure nginx two-way verification of ssl

1. Install nginx briefly

2. Use openssl to implement the certificate center
Because we use openssl to set up a private certificate center , so make sure that the following fields are the same in the certificate center's certificate, server certificate, and client certificate
country name
state or province name
locality name
organization name
organizational unit name

Edit Certificate Center Configuration File
vim /etc/pki/tls/openssl.cnf

[ ca_default ]
dir = /etc/pki/ca
certs = $dir/certs # where the issued certs are kept
crl_dir = $dir/crl # where the issued crl are kept
database = $dir/index.txt # database index file .
# unique_subject = no                 # set to 'no' to allow creation of
                                                      ‐                     ‐                                                                                                                                                                   to  certs.
certificate = $dir/cacert.pem # the ca certificate
serial                                                                                                                                                      1 crl
crl = $dir/ crl.pem                                                                                                                                                                                                                                                                                                      
countryname                                                                                                                                                                                                                        = state or province name (full name)
stateorprovincename_default = fj
LocalityName = LOCALITY NAME (EG, City)
LocalityName_Default = FZ

0.organizationNa me_default = ZDZ
OrganizationalunitName = Organizational Unit name (EG, section)
organizationalunitname_default = zdz

Create certificate private key
cd /etc/pki/ca/private
(umask 077;openssl genrsa -out cakey.pem 2048)
Generate Self-signed certificate
cd /etc/pki/ca/
openssl req -new -x509 -key private/cakey.pem -out cacert.pem -days=3655


3、 Create server certificate

mkdir /usr/local/nginx/ssl
cd /usr/local/nginx/ssl
(umask 077;openssl genrsa -out nginx.key 1024)
openssl req -new -key nginx.key -out nginx.csr
openssl ca -in nginx.csr -out nginx.crt -days=3650

4. Create client browser certificate
(umask 077;openssl genrsa -out client.key 1024)openssl req -new -key client.key -out client.csr
openssl ca -in client.csr -out client.crt -days=3650
Convert the text format certificate into a certificate that can be imported into the browser
openssl pkcs12 -export -clcerts -in client.crt -inkey client.key -out client.p12

5. Configure nginx server verification
vim /usr/local/nginx/conf/nginx.conf
ssl on;
ssl_certificate /usr/local/nginx/ssl/ nginx.crt;
ssl_certificate_key /usr/local/nginx/ssl/nginx.key;
ssl_client_certificate /usr/local/nginx/ssl/cacert.pem;
ssl_session_timeout 5m;
#ssl_verify_client on ; ; ”

Click “Add Exception”

Click “Confirm Security Exception”



6. Configure two-way authentication

Access when the client browser does not have a certificate installed

Import the certificate in the client browser

Download the client certificate generated on the Linux server to Windows

Open the Advanced tab of the Firefox browser

In the certificate manager In your certificate, click Import

Select the certificate and import

Refresh the web page again, and the "Use Confirmation" pops up and click OK to achieve two-way verification

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