How Graylog supports SOC 2 system monitoring
A SOC 2 team that needs monitoring evidence for CC7.2 and CC7.3 across a Type 2 period needs a log platform that produces records over months, not a one-time setup. Graylog can support the anomaly monitoring side of CC7.2 through streams, processing pipelines, event definitions and notifications, and it can hold the triage trail and log retention that an examiner samples. Graylog does not make the judgment on whether an anomaly is a security event, does not decide whether a security incident affected the service commitments under CC7.3, and does not write the policies or cover the other Trust Services Criteria. Those decisions belong to your security and operations staff, and the opinion itself belongs to the CPA firm performing the examination. DeployOpen plans, builds and documents the self-hosted Graylog environment and prepares evidence, but it does not certify your organization or issue any SOC 2 report.
Before the audit period starts, confirm which system components are in scope and which of them forward logs to Graylog through the inputs you have chosen. For each event type, decide who reviews the resulting event definition notifications, where triage notes are recorded, and how an analyst shows that a given alert was handled. The index model determines how long searchable data remains, and retention deletes the oldest indices by the rotation rules you set, so the retention period you select must cover the full Type 2 window plus the time needed to pull samples. Also confirm the Graylog edition you need, since some alerting and detection features are licensed separately, and confirm the OpenSearch or Data Node version against the compatibility matrix before you commit to a design.
Ask your auditor early which evidence they expect for operating effectiveness, such as sample alerts, review records and proof that log collection did not silently stop. Ask your Graylog implementation partner to show how each of those artifacts is exported or retained, and to document who holds administrative rights over the log platform itself. Treat the log store as an in-scope system: its access, change history and backup status will be examined along with the monitoring it supports. Agree these questions in writing before work starts, so the evidence plan is part of the scope rather than an afterthought at the end of the period.
Which SOC 2 monitoring requirements map to which Graylog capabilities
This table pairs each monitoring activity that CC7.2 and CC7.3 describe with the Graylog component that supports it and the configuration an assessor will expect to see. The points of focus under each criterion are characteristics that help design controls, not separate requirements, so read each row as a way to produce evidence rather than a checklist item to tick off.
| Requirement area | Graylog capability and configuration | Evidence to keep |
|---|---|---|
| CC7.2: monitor components for anomalies | Inputs (syslog, GELF, Beats) from firewalls, identity systems, servers and applications, routed into streams by source | Input list with sources, date each source was onboarded, and proof of recent message flow |
| CC7.2: detection policies and tools | Event definitions for real-time and historical searches, written against the monitoring policy you approve | Approved policy, event definition export, and change history for each definition |
| CC7.2: filters to analyze anomalies | Processing pipelines that parse and normalize fields so searches and aggregation conditions are consistent | Pipeline rule versions and test results showing expected field extraction |
| CC7.2: monitor the detection tools themselves | Alerts for missing log sources or ingestion gaps, plus review of the journal and input health in the system view | Gap alert definitions, sample alert firing records, and periodic health review notes |
| CC7.3: evaluate events and decide if they are incidents | Notifications from event definitions to email, Slack or PagerDuty, with dashboards for triage review | Notification routing settings and tickets linking each alert to a documented disposition |
| CC7.3: act to address confirmed incidents | Search and saved views used during investigation, linked to your incident process in your ticketing system | Investigation notes, saved searches used, and records of containment or remediation |
| Retention for a Type 2 period | Index sets with rotation and retention set to cover the full audit period, sized for ingest and retention | Retention settings per index set and dated records showing the period was covered |
What CC7.2 and CC7.3 ask an auditor to see
**CC7.2 asks the organization to monitor its system components for anomalies that could point to malicious acts, natural disasters or errors, and to analyze those anomalies to decide whether they are security events. CC7.3 then asks the organization to evaluate those security events and decide whether they could cause, or have caused, a failure to meet its objectives. For a Graylog team, the auditor will look for three things: a documented detection design, evidence that the detection tools ran as designed, and a record of what the team did with each event. Event definitions and notifications provide the first two. Triage records kept outside Graylog, tied to the events they reviewed, provide the third.
The TSC points of focus under CC7.2 describe characteristics that help design and evaluate controls, such as detection policies, filters and monitoring of the detection tools themselves. They are guidance, not a checklist, and not every point of focus has to be addressed. Your team should decide which points of focus fit your environment and record that decision in the system description. A Type 2 report adds an opinion on operating effectiveness over a period, so the auditor will sample events from across the audit window, not just from the day the design was signed off. Confirm the audit period and sampling approach with your auditor before you set retention, because a gap in logs during that period is hard to explain after the fact.
NIST SP 800-92 Rev. 1 is an initial public draft from October 2023, so confirm its status on the NIST site before citing it in your evidence pack. Its planning areas map directly to Graylog design choices. Generating covers which sources write logs, set in inputs and collectors. Transmitting covers how logs reach the server securely. Storing covers index sets, rotation and retention. Accessing covers roles, streams and who can search or change event definitions. Disposing covers when retention deletes the oldest indices. Document each choice with its owner and reason, because the auditor will test whether the design matches what the system actually does.
Which Graylog records to keep as SOC 2 evidence
A Type 2 examination tests whether monitoring controls operated over a period, so the auditor will ask for records that show the Graylog configuration, the alerts it produced and the people who responded. Keep each record set unchanged, dated and tied to a named owner who signs off on it at regular intervals.
Event definition configuration exports
Export each event definition, with its search query, aggregation conditions, thresholds, priority and notification targets, at the start of the period and after every approved change. Store the exports under change control so the auditor can compare the rule that was live on a given date with what the alert actually did. Confirm that changes to rules leave a trail in your change tickets, because an export alone does not show who approved an edit.
Notification history
Keep the record of what was sent, to whom and when, from each notification channel such as email, Slack or PagerDuty. Confirm that delivery failures are visible, since an alert that never reached a responder is a monitoring gap the auditor will ask about under CC7.2. Export the history on a schedule rather than relying on the channel's own retention settings.
Dated search and dashboard captures
Capture dated screenshots or saved exports of the searches and dashboards that management uses to review activity, such as failed logins or privileged actions. Each capture should show the time range, the query and the reviewer's name. These records show that anomaly monitoring was performed, not only configured, which is the point CC7.2 tests.
Triage and incident tickets linked to alerts
Link every alert that needed a decision to a ticket that records the analysis, the classification as a security event or not, and the action taken. This chain is what CC7.3 asks for: evidence that events were evaluated for their effect on objectives and acted on. Ask your team to reference the Graylog event or alert ID in each ticket, so an auditor can trace a sample from the alert to the outcome.
Index retention settings and rotation history
Record the index set settings, including rotation strategy and retention, and the history of rotations and deletions for the audit period. Retention that deletes the oldest indices means the record is only as long as the configured setting, so a change that shortens it would destroy evidence. Confirm that the period covered by the Type 2 examination is fully within the retained window, and that the setting changes are themselves logged.
Access reviews of Graylog roles
Export the users, roles and stream or dashboard permissions in Graylog at set intervals and have the system owner review who can read, change or delete log data. Record the reviewer, the date and any removals. Because the log platform holds records of other systems, a reviewer who has broad access to the logs is itself a risk the auditor will examine.
How to configure Graylog for a SOC 2 monitoring period
This sequence sets up Graylog so that log sources, retention, anomaly detection, triage and access controls are in place and proven working before the Type 2 observation window opens.
Define in-scope components and log sources
Start with the system description: list the in-scope infrastructure, applications, identity providers and cloud accounts that handle the service commitments under review, then record which logs each one produces (authentication, administrative actions, configuration changes, network and application errors). Name an owner for each source. This list becomes the baseline your auditor will compare against, so it should be approved by the people who maintain the system description. Done when every in-scope component has a documented log source and owner.
Deploy inputs and route logs into streams
Configure the Graylog inputs that match each source type, such as syslog, GELF or Beats, using the input types your Graylog edition supports. Create streams that separate security-relevant events from routine application noise, and use processing pipelines to normalize fields so later event definitions can match them consistently. Confirm that each source appears in Graylog and that timestamps are consistent across sources. Done when a test event from each in-scope source is searchable in the expected stream.
Size storage and set index retention
Work out the log volume per day and multiply it by the retention days you need, then add margin. The Graylog system architecture guidance for sizing log storage uses daily ingest times retention days times 120 percent, and it advises giving the message journal 3 to 5 times daily ingest on SSDs. Create index sets with rotation and retention that keep logs for the full Type 2 observation period and keep a searchable window your team can actually query. Confirm the retention setting with a test index and check that the oldest indices are not deleted before the period ends. Your SOC 2 auditor will set the exact period, so confirm it with them first.
Build event definitions for anomaly types
Translate the anomaly types your organization has chosen to monitor under CC7.2 into event definitions. Typical candidates include repeated failed logins, privileged role changes, disabled logging, unexpected service restarts and spikes in error rates. For each definition, document the condition, the aggregation window, the threshold and the reason the threshold fits your environment. Review the design with the security owner, because the definitions are the detection measures the auditor will test. Done when each definition has a written rationale and has been tested against sample data.
Configure notifications to the ticketing tool
Connect each event definition's notification to the channel your team uses for triage, such as a ticketing system, chat channel or paging tool. Check which notification types your Graylog edition supports, since the Graylog Open product page lists PagerDuty, Slack and email. Set the priority of each alert so the on-call and triage owners know what to act on first. Done when a notification reaches the ticketing tool and creates a ticket that carries the event details.
Establish triage and incident records
Agree on a triage procedure that links each alert to a ticket, records who reviewed it, the analysis that decided whether it was a security event, and the outcome. This directly supports the CC7.3 evaluation of whether an event could cause or has caused a failure to meet objectives. Store the tickets in a system with an audit trail and set a rule for closing them. Done when a sample alert has been triaged end to end and the record shows the reviewer, the decision and the follow-up.
Restrict access to logs and monitoring configuration
Limit who can search raw logs, edit event definitions, change index retention and modify notifications. Use Graylog roles and stream permissions, and sign users in through an approved identity provider. Your edition determines which single sign-on options are available, so confirm this against the Graylog authentication documentation. Protect the backends, MongoDB and the search cluster, with the same access discipline. Done when a test account without the required role cannot change retention or event definitions, and the access list is documented.
Test that alerts fire before the period starts
Before the observation period begins, generate controlled test events for each event definition in a non-production or agreed window, and confirm that the alert fires, the notification arrives, a ticket is created and the triage record is complete. Also test a loss of log collection, because a silent source is a monitoring failure in its own right. Record the test results with dates and reviewers. Done when every event definition has a passing test record that the auditor can inspect.
Sizing log retention for a Type 2 audit period
The retention you configure in Graylog has to cover the full observation period of your SOC 2 Type 2 report, plus whatever evidence the auditor samples from that period. Start from the period length, not from a storage budget. A Type 2 report adds an opinion on operating effectiveness over a period, so the logs behind CC7.2 and CC7.3 must exist for every day of that period. The period length is set by your engagement with the CPA firm, and the firm should confirm in writing how far back it will sample. Do not assume a number. Ask the firm for the period start and end dates, the sampling approach for monitoring evidence, and whether it expects you to keep logs for any time beyond the period for follow-up testing.
Graylog's documented sizing rule for log storage is daily ingest multiplied by retention days, multiplied by 120 percent. Apply it to your own measured daily ingest, not to an estimate. Measure ingest from the sources feeding CC7.2 monitoring (identity, production systems, cloud control planes and security tooling) over a representative period, then multiply by the number of retention days the auditor confirmed, plus margin for growth. Index rotation in Graylog's index model is driven by message count, size or time, and retention deletes the oldest indices. If you set rotation or retention too short, the oldest days of the audit period disappear silently, so check the index set settings against the period, not against the default values. Keep the message journal sized at 3 to 5 times daily ingest on SSDs, so that a backend slowdown does not cause loss of messages before they reach storage.
Verify the result before the period starts. Run a search that covers the first day of the period and confirm the events are still returned, then repeat for the last day of the retention window once it is in view. Record the index set configuration and the sizing calculation in your evidence folder, and tie them to the retention commitment the CPA firm agreed to. Confirm the retention figure with the firm and with your own infrastructure owner, including any backup or archive copies, rather than treating a single Graylog setting as the whole answer.
What buyers ask before hiring help for SOC 2 log monitoring
What drives the effort of a Graylog SOC 2 monitoring configuration?
The main drivers are how many system components generate logs, how many distinct log sources need parsing, and how many detection rules the team must define and tune. Each source needs an input, a stream or pipeline rule to route and normalize its events, and a review of whether its fields are useful for event definitions. Effort also rises with the number of anomaly types you want to cover under CC7.2, the notification paths to your on-call and ticketing tools, and the triage record you need for CC7.3. Ask any partner to size the work from a written inventory of systems, log types and existing monitoring, not from a headline figure.
Can our team configure Graylog for SOC 2 without outside help?
Often yes, if you have engineers who can run the platform and someone who understands which events matter for your system description. The hard parts are rarely the clicks in the interface. They are deciding which anomalies to detect, writing event definitions that are neither noisy nor silent, and keeping evidence that shows the monitoring worked during the Type 2 period. A partner typically adds value by planning the deployment, documenting the control design and building the review records. Treat an outside engagement as one option, and compare it with the internal hours and skills your team would need to spend.
What does the work need from our staff and our auditor?
Your staff need to supply system owners who can describe which components are in scope, access to log sources and the platform, and people who will own triage decisions after go-live. Your auditor needs to agree early on the control narrative, the evidence samples they expect and the review cadence that will be tested. The SOC 2 examination uses the AICPA 2017 Trust Services Criteria, and the AICPA's attestation standard AT-C section 205 requires management to give written representations to the service auditor. Confirm with your auditor how they want monitoring evidence presented before you design the reports.
How does Graylog licensing affect the cost of detection features?
Graylog Open is free with no volume limits and community support, but the Graylog pricing page lists separate editions for the features many SOC 2 programs want. Graylog Enterprise starts at 15,000 US dollars per year and adds a correlation engine and 24/7 support. Graylog Security starts at 18,000 US dollars per year and adds anomaly detection, investigations and compliance packs. According to the pricing page, both paid editions have a minimum of 10 GB per day or 100 Graylog Compute Units and are licensed on processed data with no per-user or per-device fees. Confirm current terms directly with Graylog, because the licensing and edition boundaries are set by the vendor.
How long must SOC 2 monitoring evidence be kept?
The SOC 2 criteria do not give a single retention number that applies to every organization, so the period comes from your own policy, your contracts and your auditor's expectations. The audit period for a Type 2 report is the window over which operating effectiveness is tested, and the logs and review records covering that window must still be available when the auditor samples them. NIST SP 800-92 Rev. 1, an initial public draft from October 2023, describes planning log retention as part of the full log lifecycle. Set the retention period in writing, configure Graylog index rotation and retention to match it, and confirm the figure with your auditor and legal team.
Does DeployOpen issue the SOC 2 report?
No. DeployOpen prepares systems, controls and evidence for compliance assessments, but it does not issue audit reports, attestations or certifications. A SOC 2 report is issued by an independent CPA firm acting as the service auditor, and the report is an examination of management's description and controls. DeployOpen's role is to plan and build the Graylog monitoring, document how it operates and help assemble the records your auditor will review. Ask any provider to state this boundary in writing so the scope of its deliverables and your auditor's responsibilities are clear.
What should a written scope for SOC 2 log monitoring include?
A written scope should name the in-scope systems and their log sources, the event types to collect, the detection logic for anomalies, the notification paths and the triage workflow with its records. It should also state the retention configuration, how access to log data is restricted, and which evidence artifacts the team will hand over. Ask for a list of deliverables tied to the CC7.2 and CC7.3 points of focus, a statement of what the client must provide, and a clear boundary for any ongoing monitoring or tuning after handover. Engagements of this kind are usually fixed-scope, so agree this document before work starts.
What operating costs recur after a Graylog monitoring setup goes live?
Recurring costs include the Graylog license if you choose a paid edition, the infrastructure for Graylog server nodes, MongoDB and the Data Node or OpenSearch storage, and the storage needed to hold logs for the retention period. Staff time for reviewing alerts, tuning event definitions and rotating credentials also recurs. The Graylog system architecture guidance advises sizing log storage as daily ingest times retention days times 120 percent, so storage cost grows with both ingest and retention. One-time costs include planning, initial build, documentation and the first evidence walkthrough with your auditor. Ask any quote to separate these categories.
How DeployOpen scopes and delivers SOC 2 monitoring evidence
DeployOpen plans, implements, hardens, documents and supports self-hosted Graylog inside your own infrastructure, so monitoring, event definitions and log retention are set up to produce the records a SOC 2 examiner will sample. DeployOpen prepares systems and evidence for the assessment, while the independent auditor performs the examination and issues the report.
How we scope
- Review which system components, log sources and environments fall inside the SOC 2 system description.
- Map the CC7.2 and CC7.3 monitoring and triage activities to the Graylog streams, event definitions and retention you will run.
- Agree deliverables, timelines and responsibilities in writing before work starts, since most engagements are fixed-scope.
How we build
- Deploy Graylog server nodes, MongoDB and the Data Node or OpenSearch backend in your cloud accounts, data centers or restricted networks.
- Configure inputs, streams and index retention, then build event definitions and notifications for the anomalies you decided to monitor.
- Test that alerts fire, notifications reach the right people and log gaps are visible before the monitoring period begins.
How we hand over
- Document the monitoring procedure, event definition inventory, escalation paths and how each triage decision is recorded.
- Provide a control evidence guide that shows the auditor where to find log samples, alert history and review records.
- Train the teams that review alerts and handle triage so the records they create match the procedure written down.
How we support
- Offer ongoing support, upgrades and continuous testing as a retainer after handover, so the monitoring keeps operating through the audit period.
- Review event definitions, retention settings and access to log data when systems or upgrades change the monitored scope.
- Confirm with your auditor which evidence format and sampling approach they expect before the Type 2 observation window opens.
