Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Need a server to try this on? Antihost offers Linux VPS plans with NVMe storage, full root access and a 14-day free trial.
Netdot turns a Linux server into a central record of network devices, links, IP addresses, MAC addresses, cabling, contacts and exported service configuration. Install the documented Perl, database and Apache stack; define site settings in etc/Site.conf; discover devices with controlled SNMP credentials; verify topology evidence; then schedule rediscovery and data pruning so the documentation follows network changes.
What Netdot documents and how it is built
The Netdot project describes itself as “an open source tool designed to help network administrators collect, organize and maintain network documentation.” Its documented release is version 1.0.8, with manual copyright metadata from 2018. The repository’s latest visible commit is dated January 27, 2021, so treat the installation notes as documentation for that codebase rather than as a guarantee of support on every current Linux distribution.
Netdot combines four pieces:
- A relational database for inventory, addresses, links and physical records.
- Perl back-end libraries that provide application logic and can also be used as an API.
- An HTML::Mason web interface served through Apache.
- Command-line programs designed for cron and other scheduled automation.
MySQL is fully supported in the documented release. PostgreSQL support is described as partial, so MySQL is the safer choice when you want to follow the manual closely.
The resulting documentation can include SNMP-discovered devices; Layer 2 topology; IPv4 and IPv6 address-management blocks; address visualizations; IP/MAC tracking; cable-plant records; contacts; exports; and role-based access control. Netdot can also generate BIND DNS and ISC DHCPD configuration files and export data for Nagios, Sysmon, RANCID, Cacti and SmokePing.
#1 Best Overall
- Powerful Turbo Fan:CAGIWIRU Electric Air Duster have reached speed up to 130000RPM,Can efficient remove dust and debris.With LED light and Three Adjustable Speed to meet with different cleaning tasks.
- With Attached USB C Fasting Charging cable.Charing 3 hours,Enjoy up to 240 minutes of use on the lowest setting, For third speed can use for 25mins.with four charging options to meet with your needs.
- Wide Application: attached 5 different nozzles,making it suitable for a variety of scenes, such as car,pet, pc, keyboards, and other electronic devices. It also serves for office and home clean duster.
- Handy Design & Portable:Cordless air duster electric nozzle is Light weight and small size, design and comfortable to hold and space saving, convenient to carry around. You can put it in your room or inside the car without taking up space.
- Economical &Reusable: Built durable materials with a long-lasting battery,our CAGIWIRU air duster it's a sustainable alternative to disposable air cans.
Plan the Linux server before installation
Choose a host and database
Use a server that can reach every management network you intend to poll. SNMP discovery is only as complete as the routing, firewall rules and credentials between the Netdot host and the devices. Reserve a stable DNS name or address for the web application, and decide whether the database will run locally or on a protected database host.
Keep the database on a backed-up volume. Inventory and historical discovery data are operational records; losing the database can remove the relationships and manual enrichments that cannot be reconstructed from a single SNMP scan.
Recommended Free Tools
Prepare access and security boundaries
- Permit the Netdot host to reach device SNMP endpoints, normally UDP 161, and allow any return traffic required by your firewall.
- Permit Apache access only from administrator or operator networks where practical.
- Use a read-only SNMP credential for initial discovery. Grant write access only if a deliberately chosen integration requires it.
- Store database, RADIUS, Kerberos or LDAP secrets in protected configuration files and limit their filesystem permissions.
- Plan an HTTPS reverse proxy or TLS-enabled Apache configuration before exposing the interface beyond a trusted management network.
Install Netdot from the source repository
The project’s source is available at https://github.com/cvicente/Netdot. The following sequence follows the documented workflow; package names and service paths may need adjustment for a modern distribution.
- Clone the source and enter the checkout:
git clone https://github.com/cvicente/Netdot.gitcd Netdot - On Debian or Ubuntu, install the build tools and packaged prerequisites using the project target:
make apt-install - On an RPM-based system, install
makeand use the corresponding target:make rpm-install - Check the dependency set:
make testdeps - If modules are missing, install the project’s dependency list:
make installdeps
Alternatively, install the individual CPAN modules named bymake testdepsthrough your distribution packages or CPAN policy. - Copy the default configuration to the site-specific file:
cp etc/Default.conf etc/Site.conf - Edit
etc/Site.conffor your hostname, database connection, installation paths, authentication choices, mail or contact settings and any local defaults.
Run make testdeps again after installing modules. A clean dependency check before database initialization prevents confusing web errors that are actually missing Perl libraries.
Ubuntu version caveat
The manual contains special patch instructions for Ubuntu 16.04. Those instructions do not establish support for current Ubuntu releases or for other distributions. If you are deploying on a newer operating system, test the package and Perl dependency set in a disposable VM, record every compatibility change, and keep the original checkout available for rollback.
Configure the database, Apache and first login
Initialize the database
Follow the database creation and installation steps in the Netdot manual for the release you checked out. Create a dedicated database and account rather than using a privileged database login from the web process. Confirm that the account can create and update Netdot’s schema, then remove unnecessary privileges after installation if the documented upgrade process permits it.
Configure Apache
The source includes Apache templates for local authentication and for RADIUS, Kerberos or LDAP-backed authentication. Select the template that matches your environment, edit its paths and identity settings, then include or enable the resulting Apache configuration. Reload Apache only after its configuration test succeeds.
Rank #2
- Screen Cleaner is Your Screen’s New Bestfriend! - EVEO is proud to present a screen cleaner that’s perfectly suited for your TV. Meet your new screen cleaner, computer screen cleaner, laptop cleaner, iPad cleaner, Macbook,tv cleaner or any other electronic device. Our screen cleaner spray and wipe along with the included plush microfiber cloth, easily removes dust, fingerprints & other smudges on the screen’s surface. Clean effectively for a streak-free screen
- Gentle on your Screens - Our screen cleaner spray and wipes is compatible to be used even for the most sensitive LCD, LED, CRT, and OLED screens in proper use. Be at ease knowing that this product is compatible with all the major brands: LG, SONY, Samsung, Sharp, iPad, iPhone, Android screens, Kindle, PC monitors - we’ve got you covered! Can be used as LCD screen cleaner, tv cleaner, smart tv screen cleaner, and more
- Premium Super Soft Plush Microfiber Cloth - Included in this efficient screen cleaning kit. This screen cleaner spray and wipe has our signature plush microfiber cloth specially designed to comply with screens and monitors and leave them streak-free. Has been shown to effectively absorbs stubborn stains, zero streaks, and no fiber shedding. Always use this together with our screen cleaner for the best results
- Easy-to-Use Screen Cleaner Kit + microfiber cleaning cloth - The EVEO Screen Cleaning Kit will easily be your new favorite tool when it comes to taking care of the things you love most, quick and easy solution for a streak-free screen. Simply screw on the sprayer gun on the screen cleaner bottle. Spray the cleaning liquid onto the microfiber cloth, then wipe the screen until desired cleanliness & shine is achieved.
- Quality Screen Care Kit Worth Purchasing - Enjoy a convenient Screen Cleaner anytime, anywhere you need it. Your satisfaction is our top priority. We stand behind the quality of our products and that’s why, you shouldn’t be worrying at all. We manufacture the Best Screen Cleaner. and can be used for laptop cleaning kit, laptop screen cleaner, tv screen cleaner for smart tv. MacBook screen cleaner, monitor cleaner or screen cleaner spray for electronic devices with microfiber cleaning cloth
Place the application at the path expected by your configuration, commonly /netdot/. If you publish it under another URL prefix, keep the Apache alias, Mason configuration and Netdot site settings consistent; a mismatch usually appears as missing assets or links that point to the wrong path.
Secure the initial account
Open the configured /netdot/ URL. The manual documents an initial username of admin and explicitly instructs administrators to change its password after the first login. Do that immediately, before adding devices or granting additional users access. Verify that the account can create a test record and that a non-administrator account cannot perform administrative edits.
Add the first devices through the web interface
For a small pilot, use Management → Devices. Enter the device hostname or IP address, SNMP community, owner, user, location and contacts, then start discovery. Use a hostname that resolves consistently; if DNS is not reliable in the management network, record the address and correct the name after discovery.
Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minute- Open Management → Devices and choose the add-device action.
- Enter a reachable hostname or IP address.
- Enter the SNMP community or other credential expected by the device and select the appropriate SNMP settings exposed by your installation.
- Set the owner, user, location and contact information. These fields make an automatically discovered record useful to someone responding to an outage.
- Run discovery and wait for the device record to populate interfaces, addresses and neighbor evidence.
- Review the result manually. Correct names, descriptions, contacts and physical locations before treating the record as authoritative.
Do not assume that a successful SNMP response means the record is complete. Access lists, view restrictions and vendor-specific MIB behavior can hide interfaces, forwarding entries or neighbor data.
Discover one device, a subnet or an inventory file from the CLI
The command-line utility is better for repeatable work. Run commands as the account and installation path used by your Netdot deployment; the examples below use the documented updatedevices.pl program.
| Purpose | Command | Use when |
|---|---|---|
| One named device | updatedevices.pl -H <device-name> -I -c <community> |
You are validating credentials or refreshing a single switch or router. |
| Discover a subnet | updatedevices.pl -B 192.168.1.0/24 |
You want Netdot to process an address range, subject to reachability and SNMP access. |
| Read a text inventory | updatedevices.pl -E <text-file> -I |
You already maintain a list of devices and want a repeatable import. |
| Retrieve ARP and forwarding data | Use the utility’s ARP and switch-forwarding modes together with the device update options. | You need IP-to-MAC and MAC-to-port evidence, not just system identity. |
| Discover topology | updatedevices.pl -T |
You want links inferred from neighbor, spanning-tree, forwarding or routed-subnet data. |
| Follow unknown neighbors | updatedevices.pl -T --recursive |
You want topology discovery to continue onto devices found during the run. |
Test a single device first. Once the result is correct, expand to a subnet or inventory file. Keep a copy of the input text file under change control so you can explain why a device appeared or disappeared from a later run.
Understand the evidence behind a topology map
Netdot does not derive every link from one universal source. Its topology discovery can use several kinds of evidence, each with different coverage and failure modes.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Rank #3
- 【Large size】：Measuring 800 x 300 mm/ 31. 5×12 inches, which is wider and taller than others. Large mouse pad can perfectly fit your keyboard and mouse of any size, and there is also ample space for peripherals such as phones, tablets, etc.
- 【LED backlight mouse pad】：Blade Hawks RGB mouse pad provides 7 static modes and 7 dynamic modes will give you the options you are looking for. Power-off memory function remembers the last lighting mode you selected. The super glow fiber Chroma will give you a colorful gaming setup that you want.
- 【Anti-slip rubber base】：Made from Natural rubber, this gaming mousepad will firmly grip your desktop, allowing you to enjoy the ultimate precision in the games you are most passionate about. It also comes with a texture that enhances this ability even further.
- 【Smooth and waterproof surface】: Micro-textured cloth surface, for extremely precise mouse control and a smooth movement. When liquid splashes on the gaming mouse pad, it forms water droplets and slides down. Will not delay your work or gameplay.
- 【Plug and play】: This mouse and keyboard pad is powered by USB, plug and play, no driver required. One button control light modes. Press one time to change the lighting mode, press twice to change the brightness, press and hold about 3 seconds turn ON/OFF.
| Evidence | What it can show | Typical limitation |
|---|---|---|
| CDP or LLDP | Neighbor identity, local and remote interfaces, and many directly connected links. | Disabled protocols, filtered advertisements or devices from another vendor can leave gaps. |
| Spanning tree | Bridge relationships and ports participating in Layer 2 paths. | Blocked or alternate paths may not look like active forwarding links. |
| Switch forwarding tables | Which MAC addresses were learned on which switch ports. | Entries age out, move during roaming and may be hidden by SNMP view restrictions. |
| Router point-to-point subnets | Routed relationships inferred from address and interface information. | Shared segments, tunnels and incomplete addressing can make the relationship ambiguous. |
Use multiple sources before declaring a link wrong. A neighbor protocol can identify the endpoints while a forwarding table explains where clients are learned; a routed subnet can confirm a Layer 3 connection when no Layer 2 protocol is present.
Enrich discovered records
After discovery, add the information SNMP cannot reliably provide: building, room, rack, cabinet, contact, jack, module, interface description, service owner, IP details and DNS behavior. Netdot also permits manually fixed neighbors when discovery cannot detect a link. Treat a fixed neighbor as an exception with an owner and review date. The manual warns that fixed relationships can become stale when hardware or cabling changes.
Build IPAM and physical documentation
Use Netdot’s IPv4 and IPv6 IPAM to represent hierarchical blocks, assign addresses and visualize utilization. Start with authoritative network boundaries, then add smaller allocations for sites, VLANs, point-to-point links and special-purpose ranges. Record why an address is reserved rather than leaving unexplained gaps.
IP/MAC tracking becomes more useful when switches regularly provide forwarding tables and routers provide ARP data. Correlate a MAC with its observed switch port and IP address, but label the result as time-sensitive: clients move, ARP entries expire and switch tables age out.
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →For cable-plant work, record jacks, modules and interface descriptions alongside the logical link. A topology diagram can show that two interfaces connect while the physical record identifies the rack, panel and outlet a technician must inspect.
Keep Netdot current with scheduled jobs
A one-time discovery becomes obsolete as soon as a switch is replaced, a VLAN is renumbered or a link is moved. The project’s sample cron strategy retrieves forwarding and ARP tables, rediscovers devices and topology, prunes old data, exports text documentation and generates configurations for external systems.
The manual gives this example hourly job:
0 * * * * root /usr/local/netdot/bin/updatedevices.pl -DIFATHere, the bundled flags represent the project’s combined update operations. Confirm the meaning of each flag against the version installed at your site before copying the schedule. The --matching option can restrict updates to a device-name pattern, which is useful when testing a site or separating polling domains.
Rank #4
- 【Softer and More Comfortable】Vaydeer wrist rest has unique diamond pattern, which is the combination of softness and aesthetics. The materials of wrist rest are improved into higher quality memory foam and covered with silky smooth lycra. The computer wrist rest makes you as comfortable and cushiony as like rest your wrists on clouds.
- 【Ergonomic Wrist Saver】The wrist rests for keyboard and mouse comes with a 17.32×3.15×0.83 inch keyboard wrist pad and a 5.94×3.15×0.83 inch mouse wrist support. Based on ergonomic design, the unique concave shape is the perfect fit for your wrist joints. The wrist rest pad fits most computer keyboards and laptops, improve hand and wrist posture, release your wrist and arm stress.
- 【Non-Slip Rubber Bottom】Featuring an anti-skid silicone base on the bottom, this wrist keyboard support stays firmly in place on your desk, preventing the padding from sliding around, ensuring stable and consistent wrist support during extended computer sessions.
- 【Better Experience & Pain Relief】Our keyboard arm rest is beneficial to alleviate the soreness caused by direct contact and friction between your arm and a hard desk surface, reducing the risk of wrist fatigue or carpal tunnel. The soft texture of memory foam can evenly distribute the pressure around your wrists and provide good support with just enough give.
- 【Helpful in Multiple Scenarios】Whether you're working, studying, writing, typing, gaming, this keyboard and mouse rest combo is an essential accessory to add comfort and support to your hands and wrists. It’s also a great gift for men, women, family, friend, coworker, gamer, teacher, etc.
Choose an interval based on load
- Begin with a small device group and measure runtime, database growth and SNMP error rates.
- Schedule forwarding and ARP collection often enough for your troubleshooting needs, but not so often that tables are constantly polled or rate-limited.
- Run topology discovery less frequently than lightweight identity checks when the network is large or links change rarely.
- Stagger jobs so database exports, pruning and external configuration generation do not collide with the heaviest discovery run.
- Send cron output to a monitored log and alert on repeated authentication failures, timeouts or abnormal runtime.
An hourly schedule is an example, not a universal interval. Polling limits, network size, device CPU, database capacity and the volatility of your environment should determine the final cadence.
Free tools Windows power users keep installed
One-click scans. No signup required.
Export records and integrate downstream systems
Netdot can export text documentation and generate BIND DNS and ISC DHCPD configuration files. It can also provide data for Nagios, Sysmon, RANCID, Cacti and SmokePing. Treat Netdot as the inventory and address-documentation source, then review generated files before deploying them to production systems.
For each integration, define ownership and failure behavior:
- Decide whether an export replaces a complete file or updates selected records.
- Keep the previous generated file so a failed run cannot erase a working configuration.
- Validate syntax before reloading DNS, DHCP or monitoring services.
- Log the Netdot database revision, export timestamp and destination system.
Use the REST interface safely
The documented REST interface is exposed under /rest/. The /rest/devinfo endpoint provides extensive device information, while /rest/updatedev supports importing devices. Use these paths for controlled integrations rather than scraping HTML pages.
Authorization is role-sensitive. Administrators can edit or delete generic REST resources; operators and regular users have narrower permissions and purpose-specific editing paths. Create the least-privileged account needed by an automation job, restrict the endpoint at Apache or a reverse proxy, and record which system is allowed to submit device updates.
Troubleshoot incomplete discovery
The device does not appear
- Test name resolution and basic reachability from the Netdot server.
- Check firewall rules and SNMP access lists on the device.
- Verify the community or credential and the SNMP version expected by the device.
- Run
make testdepsif the command fails before contacting the device. - Try the one-device command before a subnet scan so the error is isolated.
Interfaces are present but links are missing
- Confirm CDP or LLDP is enabled where policy allows it.
- Run the forwarding-table and spanning-tree collection modes.
- Check that the SNMP view exposes bridge, interface and neighbor MIBs.
- For routed links, verify that both endpoints have usable point-to-point addressing.
- Add a fixed neighbor only after documenting why automatic evidence is unavailable, and schedule a review because fixed links can become stale.
IP or MAC data looks old
ARP and forwarding entries are inherently transient. Confirm that the scheduled job is running, inspect its logs, and compare the collection interval with the device’s table-aging behavior. A recently moved endpoint may legitimately appear on its previous port until the next poll or until the device ages the old entry.
The web interface returns server errors
- Check Apache’s error log and the Perl dependency check.
- Verify that
etc/Site.confpoints to the intended database and installation paths. - Confirm database connectivity and schema initialization.
- Check that the Mason application path and Apache alias both use the configured
/netdot/prefix. - Review file ownership and permissions after copying configuration files.
Operate Netdot as a living source of truth
Define who owns each class of data. Network automation can refresh system identity, interfaces, addresses and learned paths; facilities or cabling teams may own jacks and cabinet locations; service owners should validate contacts and DNS or DHCP intent. Require a reason and reviewer for manual corrections.
Best Value
- 【No Drill Mounted】Cable management tray can be assembled in as little as 3 minutes or less-simply. Side clips easily clampe the edge of desk, pass through the holes on the sides, and secure excess cables with baskets. Desk cable management supports inward or outward installation to meet your needs in different scenarios, and provides you with great convenience when collecting and organizing wires.
- 【Rubber Pad Protects Desk】Wire organizer under desk built-in soft rubber pads on the clamp protect your desk from scratches, so you will not damage your furniture or office.
- 【Sturdy and Beautiful】Cord management under desk is made of high-quality carbon steel and holds about 15 lbs. The wire basket has 2 holes on each side of the tray to enable your cables to pass freely. Cable baskets are suitable for desk thickness use from 0.4" to 2.4".
- 【Space Saving & Keep Organized】Desk cable management tray holds all your power cords, outlet strips, USB hubs and computer transformers hidden from your feet, and the data cables will not enter the vacuum cleaner to keep your desk clean and tidy. Desk wire organizer is also suitable for use in the kitchen and outdoors.
- 【Reduce Safety Risks】Cable tray under desk keeps all plugs away from your kids, no more worry about tripping. Using 2 holes wire tray saves extra space, helps you easily cabling and wire protection. The mesh design is not easy to accumulate dust, but avoids safety accidents caused by messy wires.
Back up the database and etc/Site.conf, protect exported files, and test restoration on a separate Linux host. Keep the exact Netdot source revision and any local patches with the backup so a recovery does not depend on an undocumented package state.
Review the documentation after major changes: device replacement, VLAN redesign, routing migration, new sites, authentication changes and SNMP policy changes. A scheduled job keeps observations fresh, but it cannot infer an unlabeled cable, an intentionally unused address or the person responsible for a service without human input.
A practical rollout sequence
- Install the documented source and dependencies on an isolated Linux server.
- Configure MySQL, Apache and
etc/Site.conf; verify the initial login and change the administrator password. - Add one switch and one router through Management → Devices.
- Validate interfaces, SNMP visibility, ARP data and forwarding tables.
- Run
updatedevices.pl -T, then use--recursiveonly after the first topology result is understood. - Correct names, locations, contacts, descriptions and physical relationships.
- Define IPAM blocks and test an export to a non-production destination.
- Automate a small device group, monitor runtime and errors, then expand gradually.
- Document exceptions such as fixed neighbors, restricted SNMP views and manually reserved addresses.
This sequence separates installation risk from discovery risk and makes every later change auditable. It also gives operators a usable baseline before automation begins changing records at scale.
Frequently Asked Questions
Does Netdot support PostgreSQL?
The 1.0.8 manual describes MySQL as fully supported and PostgreSQL as partially supported. MySQL therefore follows the documented path more closely.
Is the sample hourly cron entry mandatory?
No. 0 * * * * root /usr/local/netdot/bin/updatedevices.pl -DIFAT is an example. Choose an interval that fits device polling limits, database capacity, network size and how quickly your topology changes.
What should I do when automatic topology discovery misses a link?
Check CDP or LLDP, spanning-tree, forwarding-table and routed-subnet evidence first. If the link still cannot be detected, add a fixed neighbor and assign it a review owner because manual relationships can become stale.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
