Documentation &
Systems Guide.

SSH Key Authentication (Ed25519)

Generate high-entropy Ed25519 keys and add your public key to your instance for passwordless root logins:

# Generate local Ed25519 keypair
ssh-keygen -t ed25519 -C "admin@yourdomain.com"

# Copy key to your SlikWeb server
ssh-copy-id -i ~/.ssh/id_ed25519.pub root@<SERVER_IP>

UFW Firewall & Port Hardening

Restrict inbound traffic to essential management ports and Cloudflare proxy IPs:

# Set default firewall policies
sudo ufw default deny incoming
sudo ufw default allow outgoing

# Allow SSH and Web traffic
sudo ufw allow 22/tcp
sudo ufw allow 80/tcp
sudo ufw allow 443/tcp
sudo ufw enable

NVMe I/O & IOPS Benchmarking

Verify pure NVMe Gen4 read/write speeds using standard Linux benchmarking tools:

# Test 4K random write IOPS with fio
fio --name=randwrite --rw=randwrite \
    --ioengine=libaio --direct=1 --bs=4k \
    --size=1G --numjobs=4 --runtime=30 \
    --group_reporting

Custom Reverse DNS (PTR)

Configure custom PTR records for mail server deliverables (SPF/DKIM/DMARC) and hostname verification:

# Verify active PTR record
dig -x <YOUR_SERVER_IP> +short

# Expected output: mail.yourdomain.com

Instance Snapshots & Backups

Automated nightly snapshot policies capture consistent block-level filesystem states. Snapshots are stored off-hypervisor on isolated storage clusters for one-click rollback.

Supported Operating Systems

Deploy pristine base images or mount custom bootable ISOs: