proxmox/docs/09-troubleshooting/ssh-r630-04-options.md

SSH Connection Options for R630-04

Last Updated: 2026-01-31
Document Version: 1.0
Status: Active Documentation

IP: 192.168.11.14
User: root
Issue: Permission denied with password authentication.

---

Possible Causes

1. Password incorrect - Double-check the password
2. Password authentication disabled - Server may require key-based auth
3. Account locked - Too many failed attempts
4. SSH configuration - Server may have restrictive settings
5. Wrong user - May need different username

---

Troubleshooting Steps

1. Check SSH Authentication Methods

From another host that can connect to R630-04, check:

ssh -v root@192.168.11.14 2>&1 | grep -i "auth"

Look for:

• publickey - Key-based authentication enabled
• password - Password authentication enabled
• keyboard-interactive - Interactive password prompt

2. Try Different Authentication Methods

Option A: Use SSH Key (if available)

# Check for existing SSH keys
ls -la ~/.ssh/id_*

# Copy public key to R630-04 (if you have access from another host)
ssh-copy-id root@192.168.11.14

Option B: Check if password has special characters

The password L@kers2010 contains @ which should work, but try:

• Typing it carefully
• Using copy-paste
• Checking for hidden characters

3. Connect from R630-03 (which works)

Since R630-03 works, you can:

# SSH to R630-03 first
ssh root@192.168.11.13
# Password: L@kers2010

# Then from R630-03, SSH to R630-04
ssh root@192.168.11.14

4. Check SSH Configuration on R630-04

If you have console access or another way to access R630-04:

# Check SSH configuration
cat /etc/ssh/sshd_config | grep -E "PasswordAuthentication|PubkeyAuthentication|PermitRootLogin"

# Should show:
# PasswordAuthentication yes (or the line commented out)
# PubkeyAuthentication yes
# PermitRootLogin yes (or prohibit-password)

5. Reset Root Password (if you have console access)

If you have physical/console access:

# Boot into single user mode or recovery
# Then reset password:
passwd root

6. Check Account Status

# Check if root account is locked
passwd -S root

# Check failed login attempts
lastb | grep root | tail -20

---

Alternative Access Methods

1. Use Proxmox Console

If R630-04 is managed by another Proxmox host:

# From Proxmox host managing R630-04
pct enter <container-id>  # if it's a container
# or
qm monitor <vm-id>  # if it's a VM

2. Use iDRAC/iLO (Dell R630)

If it's a physical Dell R630 server:

• Access iDRAC interface (usually https://)
• Use remote console
• Reset password from console

3. Network Boot/KVM Access

If you have KVM over IP or network boot access, you can:

• Access console directly
• Reset password
• Check SSH configuration

---

Quick Verification

Try these commands from R630-03 (which works):

# From R630-03
ssh root@192.168.11.13
# After logging in, try:
ssh -v root@192.168.11.14 2>&1 | grep -E "auth|password|key"

---

Recommended Next Steps

1. Try connecting from R630-03 - Sometimes network path matters
2. Verify password - Try typing it again carefully
3. Check if password was changed - May have been changed since last login
4. Use console access - If available (iDRAC, KVM, etc.)
5. Check SSH logs on R630-04 - /var/log/auth.log or journalctl -u ssh

---

If Password Authentication is Disabled

If the server only accepts SSH keys:

1. Generate SSH key pair (on your local machine):

   ssh-keygen -t ed25519 -f ~/.ssh/id_ed25519_r630-04
   

2. Copy public key (if you have another way to access):

   # Method 1: If you have access from R630-03
   ssh root@192.168.11.13
   ssh-copy-id -i ~/.ssh/id_ed25519_r630-04.pub root@192.168.11.14
   
   # Method 2: Manual copy (if you have console access)
   # Copy the public key content to:
   # /root/.ssh/authorized_keys on R630-04
   

3. Connect with key:

   ssh -i ~/.ssh/id_ed25519_r630-04 root@192.168.11.14