docs/journals/2023_02_20.md

• English Lesson
  • https://www.reuters.com/world/china/china-warns-us-suffer-consequences-if-it-escalates-balloon-incident-2023-02-19/
  • https://uk.news.yahoo.com/ohio-derailment-live-train-broke-091235747.html
    • https://www.truthorfiction.com/trump-ohio-train-breaks-and-deregulation/
    • I find it quite disturbing that news about the "weather" balloon seem to be more important then the toxic train crash catastrophe in Ohio. Animals dropping dead as this ecological disaster unfolds really makes you feel sad. Regarding the train infrastructure in the U.S. the build back plan should be imposed and the reverted legaslation regarding brakes reinstated.
• Spotify #Software
  • Patching for Windows: https://github.com/amd64fox/SpotX
  • Android: https://github.com/xManager-App/xManager
• https://github.com/alex/what-happens-when
  • Interview Frage zu was passiert wenn man google.com in den Browser eingibt.
    • Frage wird auf mehreren Leveln beantwortet.
• Simplelogin
  • Use to create temporary email adresses collapsed:: true
    • https://github.com/simple-login/app

      • #  generate a private and public key for DKIM:
        openssl genrsa -out dkim.key 1024
        openssl rsa -in dkim.key -pubout -out dkim.pub.key
        

    • Set A-Record to IP of Oracle Instance 152.67.84.147 Cloud
    • Create MX-Record simplelogin.mexl.de
      • 

      • dig mexl.de mx
        

        ;; ANSWER SECTION:
        mexl.de.                18      IN      MX      10 simplelogin.mexl.de.
        

    • DKIM - TXT Record

      • sed "s/-----BEGIN PUBLIC KEY-----/v=DKIM1; k=rsa; p=/g" $(pwd)/dkim.pub.key | sed 's/-----END PUBLIC KEY-----//g' |tr -d '\n' | awk 1
        

        v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDKMSgDGFeKXZgLyUI/paUXvWNhFywntJov4xR1bATzY35Ys1OX2yVPhAkGzAbMW3t792gw3RqfMDXsj7nydaz2zPzoW7w7qMGOJKpg/NFTdM2FUm0UZNeL+EazJqcgRthwqBYpebYbpUaKYK/ZtpQeN1HMKQqBs7RI+i4Hwp3+zQIDAQAB
        

      • 

      • dig @1.1.1.1 dkim._domainkey.mexl.de txt
        

        ;; ANSWER SECTION:
        dkim._domainkey.mexl.de. 150    IN      TXT     "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDKMSgDGFeKXZgLyUI/paUXvWNhFywntJov4xR1bATzY35Ys1OX2yVPhAkGzAbMW3t792gw3RqfMDXsj7nydaz2zPzoW7w7qMGOJKpg/NFTdM2FUm0UZNeL+EazJqcgRthwqBYpebYbpUaKYK/ZtpQeN1HMKQqBs7RI+i4Hwp3+zQIDAQAB"
        

    • SPF - TXT Record collapsed:: true

      • mexl.de
        v=spf1 mx ~all
        

    • DMARC - TXT Record collapsed:: true

      • _dmarc.mexl.de
        v=DMARC1; p=quarantine; adkim=r; aspf=r
        

    • Create Docker network

      • sudo docker network create -d bridge \
            --subnet=10.0.0.0/24 \
            --gateway=10.0.0.1 \
            sl-network
        

    • Postgress

      • docker-compose.yml

        version: "3"
        services:
            sl-db:
                image: postgres:12.1
                container_name: sl-db
                ports:
                    - "127.0.0.1:5432:5432"
                volumes:
                    - ./sl/db:/var/lib/postgresql/data
                environment:
                    - POSTGRES_PASSWORD=!oG3^fx!UMn%bazokfs9MSJoiD
                    - POSTGRES_USER=simplelogin
                    - POSTGRES_DB=simplelogin
                restart: unless-stopped
        networks:
            default:
                name: sl-network
                external: true
        

      • Test postgres collapsed:: true

        • docker compose up -d
        • docker compose run sl-db psql -U simplelogin simplelogin

      • sudo apt-get install -y postfix postfix-pgsql -y

      • /etc/postfix/main.cf

        # POSTFIX config file, adapted for SimpleLogin
        smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
        biff = no
        
        # appending .domain is the MUA's job.
        append_dot_mydomain = no
        
        # Uncomment the next line to generate "delayed mail" warnings
        #delay_warning_time = 4h
        
        readme_directory = no
        
        # See http://www.postfix.org/COMPATIBILITY_README.html -- default to 2 on
        # fresh installs.
        compatibility_level = 2
        
        # TLS parameters
        smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
        smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
        smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
        smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
        smtp_tls_security_level = may
        smtpd_tls_security_level = may
        
        # See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
        # information on enabling SSL in the smtp client.
        
        alias_maps = hash:/etc/aliases
        mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 10.0.0.0/24
        
        # Set your domain here
        mydestination =
        myhostname = simplelogin.mexl.de
        mydomain = mexl.de
        myorigin = mexl.de
        
        relay_domains = pgsql:/etc/postfix/pgsql-relay-domains.cf
        transport_maps = pgsql:/etc/postfix/pgsql-transport-maps.cf
        
        # HELO restrictions
        smtpd_delay_reject = yes
        smtpd_helo_required = yes
        smtpd_helo_restrictions =
            permit_mynetworks,
            reject_non_fqdn_helo_hostname,
            reject_invalid_helo_hostname,
            permit
        
        # Sender restrictions:
        smtpd_sender_restrictions =
            permit_mynetworks,
            reject_non_fqdn_sender,
            reject_unknown_sender_domain,
            permit
        
        # Recipient restrictions:
        smtpd_recipient_restrictions =
           reject_unauth_pipelining,
           reject_non_fqdn_recipient,
           reject_unknown_recipient_domain,
           permit_mynetworks,
           reject_unauth_destination,
           reject_rbl_client zen.spamhaus.org,
           reject_rbl_client bl.spamcop.net,
           permit
        

      • ``/etc/postfix/pgsql-relay-domains.cf

        # postgres config
        hosts = localhost
        user = simplelogin
        password = !oG3^fx!UMn%bazokfs9MSJoiD
        dbname = simplelogin
        
        query = SELECT domain FROM custom_domain WHERE domain='%s' AND verified=true
            UNION SELECT '%s' WHERE '%s' = 'mydomain.com' LIMIT 1;
        

      • /etc/postfix/pgsql-transport-maps.cf

        # postgres config
        hosts = localhost
        user = simplelogin
        password = !oG3^fx!UMn%bazokfs9MSJoiD
        dbname = simplelogin
        
        # forward to smtp:127.0.0.1:20381 for custom domain AND email domain
        query = SELECT 'smtp:127.0.0.1:20381' FROM custom_domain WHERE domain = '%s' AND verified=true
            UNION SELECT 'smtp:127.0.0.1:20381' WHERE '%s' = 'mydomain.com' LIMIT 1;