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What are strange IPs?

Viktar Bachkouski
Viktar Bachkouski Rising Star Dec 11, 2022

Hello! I checked my tcpdump today. What are strange IPs?

185.166.143.34

185.166.143.35

They open the Atlassian. what are they for?

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Harald Seyr
Harald Seyr Rising Star Dec 11, 2022

Hi @Viktar Bachkouski 

From whois, those IPs seem to be owned by Atlassian themselfes, as I understand the Netherlands branch: Whois IP 185.166.143.34

So this gets a "probably legit" from me, but you can always do some more analysis.

It would be helpful to know what they open. Since your post is tagged with "server", I assume you host your own instance and have access to the logs. If you share the relevant part of the access and error log, then we can check this also.

Regards,

Harald

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Viktar Bachkouski
Viktar Bachkouski Rising Star Dec 12, 2022

This 443 port, packets are not oppens

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Harald Seyr
Harald Seyr Rising Star Dec 13, 2022

In case of incoming packets, I suspect atlassian checking your site in some automated process.

In case of outgoing packets, I suspect your instance does contact some central atlassian server, eg for license validation or check for updates.

In any case, either your firewall or your access / error log should contain some more hints.

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Viktar Bachkouski
Viktar Bachkouski Rising Star Dec 14, 2022

@Harald Seyr I've blocked this IPs for OUTGOING 

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