All Security Engineering Courses
This channel is being updated often with older than 2020 courses, ebooks, videos, code, etc. to be used responsibly by everyone in CyberSecurity in an ethical manner. Lots of content is being downloaded from other channels or forwarded here. Bookmark me!
Show more📈 Analytical overview of Telegram channel All Security Engineering Courses
Channel All Security Engineering Courses (@allsecurityengineeringcourses) in the English language segment is an active participant. Currently, the community unites 18 817 subscribers, ranking 7 138 in the Technologies & Applications category and 35 862 in the Russia region.
📊 Audience metrics and dynamics
Since its creation on невідомо, the project has demonstrated rapid growth, gathering an audience of 18 817 subscribers.
According to the latest data from 19 June, 2026, the channel demonstrates stable activity. Although there has been a change in the number of participants by 133 over the last 30 days and by 6 over the last 24 hours, overall reach remains high.
- Verification status: Not verified
- Engagement rate (ER): The average audience engagement rate is 11.29%. Within the first 24 hours after publication, content typically collects 2.64% reactions from the total number of subscribers.
- Post reach: On average, each post receives 2 125 views. Within the first day, a publication typically gains 496 views.
- Reactions and interaction: The audience actively supports content: the average number of reactions per post is 3.
- Thematic interests: Content is focused on key topics such as git, strace, github, linux, docker.
📝 Description and content policy
The author describes the resource as a platform for expressing subjective opinions:
“This channel is being updated often with older than 2020 courses, ebooks, videos, code, etc. to be used responsibly by everyone in CyberSecurity in an ethical manner. Lots of content is being downloaded from other channels or forwarded here. Bookmar...”
Thanks to the high frequency of updates (latest data received on 20 June, 2026), the channel maintains relevance and a high level of publication reach. Analytics show that the audience actively interacts with content, making it an important point of influence in the Technologies & Applications category.
sudo cp /etc/ssh/sshd_config /etc/ssh/sshd_config.bak
sudo nano /etc/ssh/sshd_config
2️⃣ Запрет root и паролей
PermitRootLogin no
PasswordAuthentication no
PubkeyAuthentication yes
3️⃣Ограничение по IP (AllowUsers)
# Только с вашего офиса и VPS
AllowUsers admin@192.168.1.100 admin@203.0.113.5 deploy@10.0.0.50
# Или подсети
AllowUsers *@203.0.113.0/24
Root всё равно заблокирован, но можно @ваш_IP для root при необходимости.
4️⃣ Смена порта (обязательно)
Port 2222
Боты сканируют 22, ваш 2222 игнорят. Откройте в ufw: sudo ufw allow 2222/tcp
5️⃣ Современные алгоритмы 2025
# Только сильные шифры
Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com
MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com
KexAlgorithms curve25519-sha256,[email protected]
6️⃣ Таймауты и лимиты
ClientAliveInterval 300
ClientAliveCountMax 0
MaxAuthTries 3
LoginGraceTime 30
MaxSessions 2
🔑 Генерация и настройка ключей
На локальной машине:
ssh-keygen -t ed25519 -C "admin@server" -f ~/.ssh/server_key
ssh-copy-id -i ~/.ssh/server_key.pub [email protected] -p 2222
Права на сервере:
chmod 700 ~/.ssh
chmod 600 ~/.ssh/authorized_keys
chown -R $USER:$USER ~/.ssh
✅Тестирование перед рестартом
sudo sshd -t
# синтаксис конфига
sshd -T | grep -E "(permitrootlogin|passwordauthentication)"
# эффективные настройки
Подключитесь с нового терминала: ssh -p 2222 admin@server
🔄Применение
sudo systemctl restart sshd
sudo ufw deny 22 # закройте старый порт
sudo ufw reload
🚨Fail2ban как вишенка
sudo apt install fail2ban
sudo systemctl enable fail2ban
В /etc/fail2ban/jail.local:
[sshd]
enabled = true
port = 2222
💥Результат: 0% брутфорса, только ваши ключи с ваших IP. Логи чистые.
🖥 CodeGuard: Academy | ЧатNative Windows toolkit for AD CS enumeration and exploitation. Everything runs through built-in OS components (certreq.exe, certutil.exe, PowerShell AD module, .NET Framework) - no third-party tools needed. Build with a sprinkle of FAFO and some finding out in lab envСкрипты:
🐥adcs-common.ps1 🐥Invoke-Enumerate.ps1 🐥Invoke-SnapshotAudit.ps1 🐥Invoke-RemoteAudit.ps1 🐥Invoke-ESC1.ps1 .. Invoke-ESC13.ps1 🐥Invoke-FindTemplates.ps1 🐥Invoke-PassTheCert.ps1 🐥Invoke-ShadowCredentials.ps1 🐥Invoke-Kerberoast.ps1 🐥Invoke-DomainRecon.ps1😹 Repo #adcs #windows #powershell ✈️ Whitehat Lab 💬Chat
• Foundations: Setting up your environment and the basic syntax. • System Internals: How Windows handles tokens, processes, and services. • LSASS & Credentials: The heart of Mimikatz—extracting secrets from memory. • Kerberos Deep Dive: Tickets, forgery, and delegation. • PKI & Certificates: Hardware and software-based identities. • Domain Persistence: Owning the directory through replication. •DPAPI: Unlocking the secrets at rest.
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