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# 7. WAPT Server Advanced Configuration

The WAPT Server configuration file on GNU/ Linux and macOS systems is found in `/opt/wapt/conf/waptserver.ini` or in `/opt/wapt/waptserver/waptserver.ini`.

The WAPT Server configuration file on Windows is found in `C:\wapt\conf\waptserver.ini`.

Danger

Modification of these files is reserved for advanced users!!

## 7.1. Default configurations of waptserver file and nginx

### 7.1.1. Modify the [options] section of waptserver.ini

Several options can be defined in the [options] section.

    [options]

After modifying the `waptserver.ini` file, please ensure to restart the relevant waptservices to apply the changes, or restart the `postconf.sh`.

    systemctl restart wapttasks waptserver

Open a cmd.exe

    net stop waptservice && net start waptservice

Some available parameters for the [options] section of `waptserver.ini`

LDAP Parameters

Options (Default Value) | Description | Example
--- | --- | ---
`default_ldap_users_acls` (default `view`) | Defines the default acl for a new user opening the WAPT Console. | default_ldap_users_acls = admin
`ldap_account_service_login` (default `None`) | Defines the UPN Active directory user for SSO and/or waptserver-ldap mode for self-service. | ldap_account_service_login = wapt-ldap@ad.tranquil.it
`ldap_account_service_password` (default `None`) | Defines the user password for SSO and/or waptserver-ldap mode for self-service. | ldap_account_service_password = PASSWORD
`ldap_auth_base_dn` (default `None`) | Defines the LDAP authentication base DN. | ldap_auth_base_dn = dc=mydomain,dc=lan
`ldap_auth_server` (default `None`) | Defines the LDAP authentication server. | ldap_auth_server = srvads.mydomain.lan
`ldap_nesting_group_support` (default `True`) | Enables the search of nested group in Active Directory. | ldap_nesting_group_support = False
`ldap_primary_group_ad_support` (default `True`) | Enables the search on Active Directory primary group users. | ldap_primary_group_ad_support = False
`wapt_admin_group_dn` (default `None`) | Defines the LDAP DN of Active Directory User Group allowed to connect to the WAPT Console. | wapt_admin_group_dn = CN=waptadmins,OU=groups,DC=ad,DC=mydomain,DC=lan
`wapt_admin_group` (default `None`) | Defines the sAMAccountName Active Directory User Group(s) allowed to connect to the WAPT Console. The value can be several groups, separated by commas. | wapt_admin_group = waptadmins, wapttechs

Path Parameters

Options (Default Value) | Description | Example
--- | --- | ---
`agents_folder` (default `waptagent in wapt repository`) | Defines where the WAPT Agents are stored on the WAPT Server. | agents_folder = /var/www/wapt/waptagent
`application_root` (default `None`) | Defines a custom WAPT Server application root path. | application_root = wapt
`clients_signing_certificate` (default `None`) | Defines the host certificate signing certificate. | clients_signing_certificate = C:\private\org-coder.crt
`clients_signing_crl` (default `None`) | Defines the host certificate signing CRL path. | clients_signing_crl = C:\private\org-coder.crt
`clients_signing_key` (default `None`) | Defines the host certificate signing key path. | clients_signing_key = C:\private\org-coder.crt
`known_certificates_folder` (default WAPT `/ssl/` folder) | Adds additional known CA to verify certificates. | known_certificates_folder = /opt/wapt/ssl/
`trusted_signers_certificates_folder` (default `None`) | Defines the path to the trusted signers certificate directory. | trusted_signers_certificates_folder = C:\private\org-coder.crt
`trusted_users_certificates_folder` (default `None`) | Defines the path to trusted users CA certificate directory. | trusted_users_certificates_folder = C:\private\org-coder.crt
`wads_folder` (default `wads folder in wapt repository`) | Defines the folder on the WAPT Server that stores files related to WADS. | wads_folder = /var/www/waptwads
`wapt_folder` (default `/var/www/wapt` or `/var/www/html/wapt` or `root_dir/waptserver/repository/wapt`) | Defines the directory path of the WAPT repository. | wapt_folder = /var/www/wapt
`wapt_huey_db` (default `None`) | Defines the path to database that stores the status of running tasks. | wapt_huey_db = C:\Program Files(x86)\wapt\db\waptservertasks.sqlite
`waptwua_folder` (default wapt_folder + ‘wua’) | Defines the location of WAPT WUA folder. | waptwua_folder = /var/www/waptwua
`ipxe_script_jinja_path` (default `/opt/wapt/waptserver/templates/ipxe-default.j2`) | Defines the location of jinja template used for WADS ipxe script. | ipxe_script_jinja_path = /opt/wapt/waptserver/templates/ipxe-autoregister.j2

Enable/Disable Parameters

Options (Default Value) | Description | Example
--- | --- | ---
`login_auth_methods` (default= [‘session’, ‘admin’, ‘passwd’, ‘ldap’]) | Defines the connection type used to grant access to the WAPT console, certain APIs, and WADS. | login_auth_methods = [‘session’, ‘admin’, ‘passwd’, ‘ldap’]
`allow_unauthenticated_connect` (default `None`) | Defines whether websocket connections should be authenticated. If `use_kerberos` = `True`, then `allow_unauthenticated_connect` MUST BE set to `False` or it will take precedence. | allow_unauthenticated_connect = True
`allow_unauthenticated_registration` (default `False`) | Allows the initial registration of the WAPT Agent using a login and password. | allow_unauthenticated_registration = True
`allow_unsigned_status_data` (default `False`) | Debug only - Allows unsigned status data from Agent. | allow_unsigned_status_data = True
`optimized_authentication_logs` (default `True`) | If one of the option is set, it will not log it: `waptagent_version`, `host_tasks_status`, `get_ad_groups`, `get_ad_sites`, `get_ad_ou_split`, `host_data`, `get_hosts` , `audit_data`, `wsus.windows_updates`, `wsus.windows_products`, `wsus.windows_updates_classifications`, `packages_for_hosts`, `enterprise.reporting_exec`, `known_packages`, `repositories.get_all_agentrepos`, `repositories.get_sync_version`, `repositories.get_all_rules`, `get_all_users_acls`, `known_signers_certificates`, `enterprise.reporting_list`, `usage_statistics`, `repositories.get_createupdatefilesync`, `repositories.get_sync_changelog`, `licences` | optimized_authentication_logs = False
`auto_create_waptagent_from_config` (default `False`) | Creates a stuffed waptsetup (conf + personal certificates are added to waptsetup) from each configuration created in the WAPT Console. | auto_create_waptagent_from_config = True
`cleanup_kbs` (default `True`) | Defines whether unused :ref:` Windows KB should be automatically deleted <auto_kb_clean>` from the WAPT Server. | cleanup_kbs = False
`copy_winpe_x64_in_tftp_folder` (default `False`) | If x64, allows you to copy all WinPE from `wads_folder` when WinPE is uploaded. | copy_winpe_x64_in_tftp_folder = True
`download_wsusscn2` (default `True`) | Automatically downloads the `wsusscn2.cab` file. | download_wsusscn2 = False
`enable_store` (default `False`) | Enables WAPT Store Webui (Deprecated). | enable_store = False
`encrypt_host_packages` (default `False`) | Encrypts host package with client certificate. | encrypt_host_packages = True
`login_on_homepage` (default `True`) | Enable or disable the login on the homepage of the waptserver. | login_on_homepage = True
`homepage_enable` (default `True`) | Enable or disable the homepage of the waptserver. | homepage_enable = True
`ldap_nesting_group_support` (default `True`) | Enables the search of nested group in Active Directory. | ldap_nesting_group_support = False
`ldap_primary_group_ad_support` (default `True`) | Enables the search on Active Directory primary group users. | ldap_primary_group_ad_support = False
`login_on_wads` (default `False`) | Enables authentication to use WADS (format is `user:password`). | login_on_wads = True
`optimized_authentication_logs` (default `True`) | If one of the option is set, it will not log it: `waptagent_version`, `host_tasks_status`, `get_ad_groups`, `get_ad_sites`, `get_ad_ou_split`, `host_data`, `get_hosts`, `audit_data`, `wsus.windows_updates`, `wsus.windows_products`, `wsus.windows_updates_classifications`, `packages_for_hosts`, `enterprise.reporting_exec`, `known_packages`, `repositories.get_all_agentrepos`, `repositories.get_sync_version`, `repositories.get_all_rules`, `get_all_users_acls`, `known_signers_certificates`, `enterprise.reporting_list`, `usage_statistics`, `repositories.get_createupdatefilesync`, `repositories.get_sync_changelog`, `licences` | optimized_authentication_logs = False
`remote_repo_websockets` (default `True`) | Enables websocket communication with WAPT Agents configured as remote repositories. | remote_repo_websockets = False
`use_kerberos` (default `False`) | Enables a WAPT Agent to register using its kerberos account. If `use_kerberos` = `True`, then `allow_unauthenticated_connect` MUST BE set to `False` or it will take precedence. | use_kerberos = True
`use_ssl_client_auth` (default `True`) | Enables client certificate authentication. | use_ssl_client_auth = True
`wads_enable` (default `False`) | Enables the WADS feature and enables wapttftpserver. | wads_enable = True

Database Parameters

Options (Default Value) | Description | Example
--- | --- | ---
`db_connect_timeout` (default `3`) | Defines the maximum allowed delay before PostgreSQL queries time out (in seconds). | db_connect_timeout = 10
`db_host` (default `None`) | Defines the url of the PostgreSQL server (by default WAPT use a local Unix Socket). | db_host = https://wapt.mydomain.lan
`db_max_connections` (default `90`) | Defines the maximum simultaneous connections to the PostgreSQL database. | db_max_connections = 100
`db_name` (default `wapt`) | Defines the PostgreSQL database that the WAPT Server connects to. | db_name = wapt
`db_password` (default `None`) | Defines the password for authenticating the user on the PostgreSQL database (by default WAPT uses a local UNIX socket). | db_password = WAPT_DB_PASSWORD
`db_port` (default `5432`) | Defines the port of the PostgreSQL server. | db_port = 5432
`db_stale_timeout` (default `300`) | Defines the database stale timeout (in seconds). | db_stale_timeout = 500
`db_user` (default `wapt`) | Defines the PostgreSQL user connecting to the database. | db_user = wapt

Security Parameters

Options (Default Value) | Description | Example
--- | --- | ---
`client_certificate_lifetime` (default `3650`) | Defines the host certificate lifetime (in days). | client_certificate_lifetime = 500
`clients_read_timeout` (default `5`) | Defines the websocket client timeout (in seconds). | clients_read_timeout = 10
`clients_signing_crl_days` (default `30`) | Defines the host certificate signing CRL periodicity (in days). | clients_signing_crl_days = 15
`clients_signing_crl_url` (default `None`) | Defines the host certificate signing CRL URL. | clients_signing_crl_url = https://srvwapt.mydomain.lan/crl
`client_tasks_timeout` (default `5`) | Defines the maximum allowed delay before WAPT Agent requests time out (in seconds). | client_tasks_timeout = 5
`http_proxy` (default `None`) | Defines the proxy server to allow the WAPT Server to recover its CRL. | http_proxy = http://srvproxy.mydomain.lan:3128
`htpasswd_path` (default `None`) | Adds basic authentication to WAPT Server. | htpasswd_path = True
`list_subnet_skip_login_wads` (default `[]`) | Lists subnets without authentication requirement. | list_subnet_skip_login_wads = 192.168.0.0/24,192.168.1.0/24
`loglevel` (default `warning`) | Defines the log level. Possible values are: `debug`, `info`, `warning`, `critical`. | loglevel = debug
`max_clients` (default `4096`) | Sets the maximum simultaneous WAPT client connections. | max_clients = 2048
`min_password_length` (default `10`) | Sets the minimum SuperAdmin password length. | min_password_length = 15
`secret_key` (default `None`) | Defines the random string for initializing the Python Flask application server. The string is generated when first installing the WAPT Server and is unique for every WAPT Server. | secret_key = FKjfzjfkF687fjrkeznfkj7678jknk78687
`server_uuid` (default `None`) | Defines the WAPT Server UUID (this anonymous id is used for WAPT statistics). | server_uuid = 76efezfa6-b309-1fez5-92cd-8ea48fc122dc
`session_lifetime` (default `126060`) | Defines the maximum allowed time the session is opened (in seconds). | session_lifetime = 352120
`signature_clockskew` (default `300`) | Defines the maximum allowed time difference for the websockets (in seconds). | signature_clockskew = 72000
`token_lifetime` (default `43200`) | Defines the authentication token lifetime (in seconds). | token_lifetime = 43200

Network Parameters

Options (Default Value) | Description | Example
--- | --- | ---
`nginx_http` (default `80`) | Defines the Nginx web server HTTP port (Windows only). | nginx_http = 8080
`nginx_https` (default `443`) | Defines the Nginx web server HTTPS port (Windows only). | nginx_https = 44380
`remote_repo_update_delay` (default `1`) | Defines the periodicity at which the WAPT Server verifies the synchronization status of remote repositories (in minutes). | remote_repo_update_delay = 5
`wapt_bind_interface` (default `127.0.0.1`) | Defines how to listen to the WAPT Server service. | wapt_bind_interface = 127.0.0.1
`waptserver_port` (default `8080`) | Defines the WAPT Server python service port. | waptserver_port = 1313
`wol_port` (default `7,9`) | Defines the list of WakeOnLAN UDP ports to send magic packets to. | wol_port = 9, 123, 4000

Authentication Parameters

Options (Default Value) | Description | Example
--- | --- | ---
`wapt_password` (default `None`) | Defines the SuperAdmin password for connecting to the WAPT Console. | wapt_password = 46642dd2b1dfezfezgfezgadf0ezgeezgezf53d
`wapt_user` (default `admin`) | Defines the SuperAdmin username in the WAPT Console. | wapt_user = wapt_admin

### 7.1.2. Configuring Nginx

The default Nginx configuration is as follows:

    # uwsgi upstream  server
    upstream waptserver {
      server unix:///run/waptserver/uwsgi.sock;
    }

    log_format combined_ssl '$remote_addr $ssl_client_s_dn $ssl_client_verify $remote_user [$time_local] '
                        '"$request" $status $body_bytes_sent '
                        '"$http_referer" "$http_user_agent"';

    server {

        listen                      80;

        listen                      [::]:80;

        listen                      443 ssl;

        listen                      [::]:443 ssl;

        server_name                 srvwapt.mydomain.lan;

        server_name                 192.168.100.12;

        access_log "/var/log/nginx/access.log" combined_ssl;

        ssl_certificate             "/opt/wapt/waptserver/ssl/cert.pem";
        ssl_certificate_key         "/opt/wapt/waptserver/ssl/key.pem";
        ssl_protocols               TLSv1.2;

        ssl_dhparam                 "/etc/ssl/certs/dhparam.pem";

        ssl_prefer_server_ciphers   on;
        ssl_ciphers                 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';
        ssl_stapling                on;
        ssl_stapling_verify         on;
        ssl_session_cache           none;
        ssl_session_tickets         off;

        # HSTS (ngx_http_headers_module is required) (63072000 seconds)
        add_header Strict-Transport-Security "max-age=63072000" always;

        ssl_client_certificate "/opt/wapt/conf/ca-srvwapt.mydomain.lan.crt";

        ssl_crl "/opt/wapt/conf/ca-check-clients.crl";

        ssl_verify_client optional;

        gzip_min_length     1000;
        gzip_buffers        4 8k;
        gzip_http_version   1.0;
        gzip_disable        "msie6";
        gzip_types          text/plain text/css application/json;
        gzip_vary           on;

        index index.html;

      server_tokens off;

        client_max_body_size 12288m;
        client_body_timeout 1800;

        large_client_header_buffers 4 16k;
        proxy_headers_hash_max_size 1024;
        proxy_headers_hash_bucket_size 128;

        proxy_request_buffering off;

        location ^~ /.well-known/acme-challenge/ {
          default_type "text/plain";
          root         /var/www/html;
        }

        # sub instances
        include "/opt/wapt/conf/wapt.d/*.conf";

        location /static {
                alias "/opt/wapt/waptserver/static";
        }

        location /ssl {
                alias "/var/www/ssl";
        }

        # not protected URL
        location ~ ^/(wapt/waptsetup.*\.exe|wapt/ping|wapt/waptagent/.*|wapt/waptagent\.exe|wapt/waptdeploy\.exe|wapt/conf\.d/.*\.json)$ {
            add_header Cache-Control "store, no-cache, must-revalidate, post-check=0, pre-check=0";
            add_header Pragma "no-cache";
            root "/var/www";
        }

        location ~ ^/api/v3/(wads_register_host|set_host_wads_status|baseipxe|get_host_ipxe|get_wads_exe.*|get_wads_config)$ {

                proxy_http_version 1.1;
                proxy_request_buffering off;

                include "/opt/wapt/conf/forward_ssl_auth.conf";

                rewrite /(.*) /$1 break;

                proxy_pass http://127.0.0.1:8080;

        }

        # not protected URL
        location /wads {

          alias "/var/www/wads";

        }

        location = / {
          include "/opt/wapt/conf/forward_ssl_auth.conf";
          proxy_pass http://127.0.0.1:8080;
        }

        # SSL protected URL
        location /waptwua {
            add_header Cache-Control "store, no-cache, must-revalidate, post-check=0, pre-check=0";
            add_header Pragma "no-cache";

            include "/opt/wapt/conf/forward_ssl_auth.conf";

            include "/opt/wapt/conf/require_ssl_auth.conf";

            alias "/var/www/waptwua";

        }

        # SSL protected URL
        location ~ ^/(wapt/.*|wapt-diff-repos/.*|licences\.json|sync\.json)$ {
            add_header Cache-Control "store, no-cache, must-revalidate, post-check=0, pre-check=0";
            add_header Pragma "no-cache";

            include "/opt/wapt/conf/forward_ssl_auth.conf";

            include "/opt/wapt/conf/require_ssl_auth.conf";

            root "/var/www";
        }

        location /rules.json {
            add_header Cache-Control "store, no-cache, must-revalidate, post-check=0, pre-check=0";
            add_header Pragma "no-cache";

            include "/opt/wapt/conf/forward_ssl_auth.conf";

            root "/var/www";
        }

        # we don't want to expose our list of computers in case someone scan this folder.
        location /wapt-host/Packages {
            return 403;
        }

        location ~ ^/(wapt-host/.*)$ {
            log_not_found off;
            add_header Cache-Control "store, no-cache, must-revalidate, post-check=0, pre-check=0";
            add_header Pragma "no-cache";

            include "/opt/wapt/conf/forward_ssl_auth.conf";

            include "/opt/wapt/conf/require_ssl_auth.conf";

            root "/var/www";
        }

        location ~ ^/.*_kerberos$ {

            proxy_http_version 1.1;
            proxy_request_buffering off;

            include "/opt/wapt/conf/forward_ssl_auth.conf";

            auth_gss on;
            auth_gss_format_full on;
            auth_gss_keytab  /etc/nginx/http-krb5.keytab;
            proxy_pass http://127.0.0.1:8080;

        }

        # we need socketio for these actions.
        # they are enabled only locally on the loopback
        location ~ ^/api/v3/(update_hosts_sid_table|hosts_sid)$ {
            proxy_http_version 1.1;
            proxy_request_buffering off;

            include "/opt/wapt/conf/forward_ssl_auth.conf";

            rewrite /(.*) /$1 break;
            proxy_pass http://127.0.0.1:8080;
            allow 127.0.0.1;
            deny all;
        }

        # we need socketio for these actions
        location ~ ^/api/v3/(update_hosts_sid_table|trigger_host_action|reset_hosts_sid|host_tasks_status|trigger_cancel_task|hosts_delete|launch_sync_on_remotes_repos|broadcast_sync_on_remotes_repo)$ {
            proxy_http_version 1.1;
            proxy_request_buffering off;

            include "/opt/wapt/conf/forward_ssl_auth.conf";

            include "/opt/wapt/conf/require_ssl_auth.conf";

            rewrite /(.*) /$1 break;
            proxy_pass http://127.0.0.1:8080;
        }

        location /get_websocket_auth_token {
            return 404;
        }

        # these actions are not protected by SSL client side certificate, as we perhaps don't have one at this stage.
        # in case uwsgi is enabled, we wat this to still be handled by eventlet waptserver as these endpoints are not cpu intensive but often called
        location ~ ^/(ping)$ {
            proxy_http_version 1.1;
            proxy_request_buffering off;

            include "/opt/wapt/conf/forward_ssl_auth.conf";

            rewrite /(.*) /$1 break;
            proxy_pass http://127.0.0.1:8080;
        }

        # these actions are not protected by SSL client side certificate, as we perhaps don't have one at this stage.
        location ~ ^/(login|api/v3/login|api/v3/logout|api/v3/get_hash_json_content|api/v3/waptagent_version|add_host|api/v3/add_host|api/v3/get_waptagent_exe/.*/waptagent.exe)$ {
            proxy_http_version 1.1;
            proxy_request_buffering off;

            include "/opt/wapt/conf/forward_ssl_auth.conf";

            rewrite /(.*) /$1 break;

            include    /opt/wapt/conf/uwsgi_params;
            uwsgi_pass  waptserver;

        }

        location / {
            proxy_http_version 1.1;
            proxy_request_buffering off;

            include "/opt/wapt/conf/forward_ssl_auth.conf";

            include "/opt/wapt/conf/require_ssl_auth.conf";

            include     /opt/wapt/conf/uwsgi_params;
            uwsgi_pass  waptserver;

        }

        location /socket.io {
            proxy_http_version 1.1;
            proxy_request_buffering off;

            include "/opt/wapt/conf/forward_ssl_auth.conf";

            include "/opt/wapt/conf/require_ssl_auth.conf";

            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "Upgrade";
            proxy_pass http://127.0.0.1:8080/socket.io;
        }
    }

## 7.2. Configuring WAPT Server for large infrastructures

The default operating system, Nginx and PostgreSQL settings are adapted for around 400 WAPT Agents. If you have more than 400 clients it is necessary to modify a few system level parameters along with PostgreSQL database, Nginx web and WAPT Server python server.

In the future, the postconf.sh script might take charge of this configuration depending on the expected number of client computers.

With the following parameters, one WAPT Server should scale up to around 5000 concurrent active clients. You may have more clients in the database if they are not all running at the same time. If you have more than 5000 clients it is recommended to have more than one WAPT Server.

The limit in the number of end point clients is due to the bottleneck in the python code and the PostgreSQL backend. WAPT performance gets better with time and in the future WAPT Server might support a large base on a single host. However the Nginx part scales very well and it can takes full advantage of a 10Gbps connection for high load package deployments.

Note

The parameters to be modified below are linked together and should be modified globally and not individually.

### 7.2.1. Multithreading support with uWSGI

To enable multithreading with uWSGI, you can add the following parameter in section [options] of `/opt/wapt/conf/waptserver.ini`:

    use_uwsgi = True

You must run `/opt/wapt/waptserver/scripts/postconf.sh` after this modification.

### 7.2.2. Configuring Nginx

`nginx.conf` configuration file location
OS Type | File location
--- | ---
Debian and derivatives | `/etc/nginx/nginx.conf`
RedHat and derivatives | `/etc/nginx/nginx.conf`
Windows | `C:\wapt\waptserver\nginx\conf\nginx.conf`

In the `nginx.conf` file, modify the `worker_connections` parameter. The value should be around 2.5 times the number of WAPT clients (n connections for websockets and n connections for package downloads and inventory upload + some margin).

    events {
      worker_connections 4096;
    }

Then upgrade the number of filedescriptors in the `nginx.conf` file:

    worker_rlimit_nofile 32768;

Depending on the partitioning of your WAPT Server you might have to be careful with the Nginx temporary file upload directory. Nginx acts as a reverse proxy for the WAPT Server Python engine and its does a caching of packages uploaded when uploading a new package from the Console.

The packages are stored in the `/var/lib/nginx/proxy` directory. You have to make sure that the partition hosting this directory is large enough. You may change this directory location using the following Nginx configuration parameter.

    $client_body_temp_path

### 7.2.3. Configuring the Linux System

Increase the number of filedescriptors. The system unit file asks for an increase in the allowed number of filedescriptors (LimitNOFILE=32768). We should have the same thing for Nginx. There are a few limits to modify.

First we modify system wide the number of filedescriptors allowed for Nginx and WAPT.

- Create the `/etc/security/limits.d/wapt.conf`.

    cat > /etc/security/limits.d/wapt.conf <<EOF
    wapt         hard    nofile      32768
    wapt         soft    nofile      32768
    www-data     hard    nofile      32768
    www-data     soft    nofile      32768
    EOF

Nginx serves as a reverse proxy and makes quite a lot of connections. Each WAPT client keeps a websocket connection up all the time in order to respond to actions from the WAPT Server.

The Linux kernel has a protection against having too many TCP connections opened at the same time and one may get the SYN flooding on port message in the Nginx log. In order to avoid these messages, it is necessary to modify the two following parameters. It should be around 1.5 times the number of WAPT clients.

    cat > /etc/sysctl.d/wapt.conf <<EOF
    net.ipv4.tcp_max_syn_backlog=4096
    net.core.somaxconn=4096
    EOF

    sysctl --system

### 7.2.4. Configuring the PostgreSQL database

`postgresql.conf` configuration file location
OS Type | File location
--- | ---
Debian and derivatives | `/etc/postgresql/{version}/main/postgresql.conf`
RedHat and derivatives | `/var/lib/pgsql/{version}/data/postgresql.conf`
Windows | `C:\wapt\waptserver\pgsql{version}_data\postgresql.conf`

A higher number of clients need a higher number of connections to the PostgreSQL database. In the `postgresql.conf` file, you need to increase the following parameter to approximately 1/4 the number of active WAPT Agents.

    max_connections = 1000

In `/opt/wapt/conf/waptserver.ini` file (for Windows `C:\wapt\conf\waptserver.ini`), `db_max_connections` should be equal to PostgreSQL `max_connections` minus 10 (PostgreSQL needs to keep some connections for its housekeeping stuff). The `max_clients` parameter should be set around 1.2 times the number of WAPT Agents:

    [options]
    ...
    max_clients = 4096
    db_max_connections = 990

## 7.3. Using the command-lines for repository management

### 7.3.1. wapt-get upload-package

The wapt-get upload-package <path to the package> command uploads a package onto the main WAPT repository.

The command wapt-get upload-package C:\waptdev\tis-tightvnc.wapt returns:

    Using config file: C:\Users\documentation\AppData\Local\waptconsole\waptconsole.ini
    Uploading packages to https://srvwapt.mydomain.lan
    Please get login for https://srvwapt.mydomain.lan/api/v3/upload_xxx:admin
    Password:
    c:\waptdev\tis-tightvnc.wapt[================================] 54316019/54316019 - 00:00:17
    OK : 1 Packages uploaded, 0 errors

### 7.3.2. wapt-get scan-packages

Hint

This command applies to Windows repositories ONLY.

The wapt-get scan-packages <directory> command rebuilds a `Packages` file for a WAPT package repository.

The command wapt-get scan-packages C:waptwaptserverrepositorywapt returns:

    Using config file: C:\Program Files (x86)\wapt\wapt-get.ini
    Packages filename: C:\wapt\waptserver\repository\wapt
    Processed packages:
      C:\wapt\waptserver\repository\wapt\tis-firefox.wapt
      C:\wapt\waptserver\repository\wapt\tis-tightvnc.wapt
      C:\wapt\waptserver\repository\wapt\tis-7zip.wapt
    Skipped packages:

### 7.3.3. wapt-scanpackages

Hint

This command applies to Linux repositories ONLY.

The wapt-scanpackages <directory> command rebuilds a `Packages` file for a WAPT package repository.

The command wapt-scanpackages /var/www/wapt/ returns nothing.

### 7.3.4. Re-signing packages on the WAPT Server using a command line

Use this method if re-signing from the WAPT console method does not complete successfully. These commands are ONLY available for WAPT Servers running Linux.

Warning

Before using this method, ensure that your WAPT Server is safe and not under the control of an unauthorized third party entity.

- Copy your `.crt` and `.pem` to `/tmp/` on the WAPT Server using Winscp or an equivalent tool.

- It is then possible to re-sign all the packages at once on the WAPT Server with the following commands.

    wapt-signpackages -d /var/www/wapt-host -c /tmp/wapt_pub_key.crt -k /tmp/wapt_priv_key.pem -s
    wapt-signpackages -d /var/www/wapt -c /tmp/wapt_pub_key.crt -k /tmp/wapt_priv_key.pem -s
    wapt-scanpackages /var/www/wapt/

If the error Access violation appears, the reason is that the WAPT package is too voluminous.

Edit the package and check this procedure to transfert a voluminous package.

Danger

Remove the .crt and .pem from `/tmp/` on the WAPT Server or the server will become a sensitive asset.

For more available options, please see the command line section.