Servperso Systems

  • Status Completed
  • Percent Complete
    100%
  • Task Type Incident
  • Category Any
  • Assigned To No-one
  • Operating System All
  • Severity Low
  • Priority Medium
  • Reported Version Development
  • Due in Version Undecided
  • Due Date Undecided
  • Votes
  • Private
Attached to Project: Servperso Systems
Opened by Servperso - 14.03.2021
Last edited by Servperso - 14.03.2021

FS#6 - Email spamming issue from customers - billing email impact + port closure

We encountered several problems because the mikrotik of one of our customers found itself open proxy during the month of February.

As a result, and to remedy this in a sustainable way, we have taken the following measures towards our IPs. This does not apply to ip advertised through AS34872

- Change of reverse DNS to isp.servpersosystems.net
- Closure of ports 25, 135 and 139 out (smtp and samba)
- Close ports 1080 and 8080 in in (proxy)

These steps are final, if you wish to send emails we encourage you to use your own / 24.

This incident may impact billing emails. Remember to check the spam folder and mark our emails as “legitimate”. It would help us.

Admin
Servperso commented on 05.04.2021 00:25

Email feel to flow without issue to gmail now
We also change customer reverse dns to avoid such issue

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