# Troubleshooting

> The problems that come up most, and how to report one so it can be fixed.

Source: https://joinnasnet.com/en/guides/nasnet-connect/troubleshooting/
Last updated: 2026-08-14

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## Overview

Most problems with Nasnet Connect fall into two groups: something in the wizard
will not let you continue, or the generated script did not do what you expected
once applied. The first group is almost always a validation rule doing its job;
the second usually traces back to an answer given earlier in the wizard.

## Troubleshooting

**A step will not complete.** Every sub-step has completion conditions, and the
main stepper only marks a step done when all of its sub-steps are satisfied.
Look for a red validation message on the screen, because the wizard names the field or
the rule that is blocking you.

**An interface you need is not in the list.** Interfaces are offered once. If a
port was claimed by a WAN link, or by the trunk to an access point, it will not
appear on the LAN step, and it will be shown as **Not Available** with a note
about what is using it. Change the earlier assignment to free it.

**"Subnet Conflicts Detected".** Two networks were given overlapping ranges on
the **Network Subnets** screen. The banner names the conflict. See
[Network Subnets](/en/guides/nasnet-connect/lan/subnets/).

**"Certificate required."** You enabled SSTP, OpenVPN or IKEv2 as a VPN server.
Those need an SSL certificate, so configure one under
[Useful Services](/en/guides/nasnet-connect/extra-config/useful-services/).

**"No Common Wireless Bands Available."** The two routers you selected for a
wireless trunk do not support the same band. Use a wired trunk, or change one of
the models.

**The wireless trunk option is greyed out.** One of your selected routers has no
Wi-Fi. The warning box lists which.

**You cannot reach the router after applying the script.** If you changed
service ports on the **Services** step, you must use the new ports. If you
cannot get in at all, restore the backup you took, or factory-reset the router.
See [Applying the config to your router](/en/guides/nasnet-connect/applying-the-config/).

**A game is not reachable.** The port data on the **Game** screen comes from
portforward.com and is provided without verification. Check the ports against
the game's own documentation.

**Firmware updates.** The project's guidance: check for updates monthly and
apply stable releases; always back up before updating, and test in a
non-production environment first.

## Getting help

Report problems either on
[GitHub Issues](https://github.com/nasnet-community/connect/issues) or in the
[Telegram group](https://t.me/joinnasnet). When you report one, include:

- A description of the problem and the steps to reproduce it.
- What you expected to happen.
- Screenshots, if relevant.
- Your environment, meaning operating system and browser.
- The router configuration file, with sensitive data removed.
- The state history log from the Debug Tools panel, with sensitive data removed.

Strip passwords, IP addresses and personal data before you attach anything.

## Related

- [Applying the config to your router](/en/guides/nasnet-connect/applying-the-config/)
- [Show Config](/en/guides/nasnet-connect/show-config/)