Link Local New Network alert uses the wrong mask [MN] [V6]

A. THE BUG/ISSUE (Varies from issue to issue)
[ol]- Summary - Give a clear summary in the topic title, NOT here.
When a ‘New Network’ detection alert is generated for a link local address space ( it shows a 17 bit mask. (image) However, a zone with the correct mask is created.

  • Can U reproduce the problem & if so how reliably?:
    It’s been reproducible for several versions of CIS

  • If U can, exact steps to reproduce. If not, exactly what U did & what happened:
    Force a New Network alert, nine times out of ten you’ll get the correct network alert and a link local alert. That’s also an issue that could do with some attention.

  • If not obvious, what U expected to happen:
    Display the correct mask

  • If a software compatibility problem have U tried the conflict FAQ?:

  • Any software except CIS/OS involved? If so - name, & exact version:

  • Any other information, eg your guess at the cause, how U tried to fix it etc:

  • Always attach - Diagnostics file, Watch Activity process list, (dump if freeze/crash). If complex - CIS logs & config, screenshots, video, zipped program (not m’ware)

B. YOUR SETUP (Likely the same for each issue, so you can copy forward)
[ol]- Exact CIS version & configuration:

  • Modules enabled & level. D+/HIPS, Autosandbox/BBlocker, Firewall, & AV:
    Firewall only

  • Have U made any other changes to the default config? (egs here.):
    Custom Policy Mode, Alert Frequency on Very High, delete the defaul firewall rules, disable everything else.

  • Have U updated (without uninstall) from a previous version of CIS:
    Clean install

[li]if so, have U tried a a clean reinstall - if not please do?:

[/li]- Have U imported a config from a previous version of CIS:

[li]if so, have U tried a standard config - if not please do:

[/li]- OS version, SP, 32/64 bit, UAC setting, account type, & VM used:
Windows 7 x64, UAC off, Administrator, No VM

  • Other security/sandbox software a) currently installed b) installed since OS:

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Thank you very much for your report in standard format, with all information supplied. The care you have taken is much appreciated by Comodo, and will increase the likelihood that this bug can be fixed.

Developers may or may or may not communicate with you in the forum or by PM/IM, depending on time availability and need. Because you have supplied complete information they may be able to replicate and fix the bug without doing so.

Many thanks again


Can you please check and see if this is fixed with the newest version? Please let us know whether it is fixed or you are still experiencing the problem.

Thank you.

PM sent.


Thanks for update.