Can network logs help a cyber insurance claim?
Yes, they can help establish what happened and when, which both the claim and any breach notification depend on. Network records can show when unusual connections began, which devices were involved, whether a device kept calling an outside server at regular intervals and whether large volumes left the network, which helps separate an encryption-only attack from one where data was also taken. For that to count, records must cover the period in question, carry reliable timestamps and be protected from later changes, so set retention before you need it and keep copies outside the affected systems. NetSenX keeps alerts for your plan’s alert history and an audit log of actions and changes in the account. It records metadata, not the content of encrypted sessions, so it can show that data left and where it went, not what the files contained. Whether a record satisfies a particular insurer is for you and your broker to confirm.
General information, not legal advice. National laws can add to the EU texts quoted here, for example deadlines, forms or reporting channels: check your own country's rules.