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Security investigation

Investigate SSH Brute Force Attacks Without the Guesswork

When your servers are under attack, you need to see the evidence fast. Grep Badger lets you open auth.log and secure.log over SSH, filter failed logins by IP and time, and trace attack patterns — all from a desktop GUI. No agents on the server, no cloud uploads.

Brute force attacks leave a trail. Most tools make it hard to follow.

Your server gets hit with thousands of SSH login attempts every day. Most fail. Some don't. When you suspect a breach, you need to find the needle in the haystack: which IP attacked, when it started, how fast the attempts came, and whether anything got through.

The traditional workflow is painful: SSH in, run a chain of grep and awk commands, manually sort by IP, cross-reference timestamps, and hope you did not miss the successful login that started the whole thing. By the time you are done, the attacker has already moved on.

The solution

Open the log. Filter. See the attack. Done.

Grep Badger connects over SSH and gives you a proper GUI for auth.log and secure.log. Filter by "Failed password", sort by source IP, highlight successful logins from suspicious addresses. See the full attack timeline without writing a single command.

Stuck trying to make sense of the pattern? Ask the local AI what you are looking at. It reads the actual log context and explains the attack in plain English. With self-hosted Ollama, your security data never leaves your machine.

Open auth.log and secure.log directly

Connect over SSH and open the authentication log files without downloading or copying them to your machine.

Spot brute force patterns instantly

Filter by failed password, invalid user, or specific source IPs. Spot attack patterns across thousands of entries in seconds.

Trace attack timelines

See exactly when an IP started probing, how fast the attempts came, and whether any succeeded. Correlate across multiple log files.

Export findings for reports

Highlight and copy attack evidence for incident reports, ticket attachments, or compliance documentation.

Ask the AI what happened

Describe the behavior you are seeing and the local AI explains the pattern, identifies the attack type, and suggests next steps.

Works on every Linux server

No agents, no configuration, no root access required. Standard SSH is all you need.

From alert to answer in three steps

  1. 1. Connect to the affected server — standard SSH, your existing keys
  2. 2. Open /var/log/auth.log — filter for "Failed password", sort by source IP
  3. 3. Trace and report — highlight the attack window, export findings, or ask the AI to explain

No agents. No log shipping. No cloud. The log stays on the server.

How Grep Badger compares

Approaches to investigating SSH brute force attacks, each with tradeoffs.

ApproachWhat you getWhat you do not
SSH + grep/awk pipelineFast for targeted queries, already availableHard to correlate, no visual timeline, no AI assistance
Download log and open locallyFamiliar desktop toolsStale data, security risk, cannot tail live
SIEM / cloud platformDashboards, alerting, team accessLog shipping required, recurring cost, security data in the cloud
Grep BadgerGUI over SSH, AI analysis, no shipping, one-time purchaseNo team dashboards, no centralized alerting

Common questions

How do I investigate an SSH brute force attack with Grep Badger?
Connect to your server over SSH, open /var/log/auth.log (or /var/log/secure on RHEL-based systems), and filter by "Failed password" or "Invalid user". You can then sort by source IP, time range, or username to reconstruct the attack timeline.
Can Grep Badger help me find which IP is attacking me?
Yes. Use the search and filter tools to isolate failed login attempts, then sort by source IP address. You will see which IPs are making the most attempts, when they started, and whether any succeeded.
What if the log file is rotated or compressed?
Grep Badger opens .1, .2, .old, and .gz compressed log files directly. Rotated authentication logs are no harder to investigate than the active file.
Do I need root access to investigate auth logs?
You need read access to the log files, which is typically granted through sudo or group membership. If you can run `tail /var/log/auth.log`, you can investigate with Grep Badger.
Can I investigate attacks across multiple servers?
Yes. Open connections to different servers in sequence and compare auth.log patterns. The AI can help correlate events across machines when you provide the context.

See the attack. Not just the alert.

One-time purchase. No subscription. No cloud.

Related pages

View logs over SSHAnalyze logs locallyAI-powered log analysis
SSH Brute Force Investigation - Find and Trace Attacks in Server Logs | Grep Badger