Malicious requests from 65.154.226.XXX to our service

[SaSupNL]

Hello,

We are hosting a cloud solution and we have identified a increased amount of malicious requests all originating from 65.154.226.XXX IP ranges. Most of them coming from 65.154.226.126, 65.154.226.220 and 65.154.226.100. It turns out these IPs originate from paloaltonetworks.com, that is why I am posting it here.

According to AbuseIPDB these IPs are being reported by users for abuse (see https://www.abuseipdb.com/check/65.154.226.100), but AbuseIPDB itself is stating the IPs are whitelisted as being typically owned by trusted entities, such as Google or Microsoft who may use them for search engine spiders. However, these same entities sometimes also provide cloud servers and mail services which are easily abused. Pay special attention when trusting or distrusting these IPs.

Should we block all requests to our cloud service from the 65.154.226.XXX range?

Thanks.

SA

[OtakarKlier]

Hello @reaper @kiwi ,

Would this the PANURL scanning for updates?

Thoughts?

[DPoppleton]

Those are the PAN-DB webcrawlers. I opened a case about this about a month ago.

[Samson_Colaco]

Any update on this?

[kiwi]

Hi @Samson_Colaco ,

As mentioned earlier these are webcrawlers.

PAN-DB, uses automated systems to identify and categorize content on the internet. It has been observed that certain suspicious activity in some customer networks has caused the URL Filtering systems to look up IP addresses that are not recognized. To better understand these websites, automated programs, called crawlers are sent to visit the systems with those IP addresses.

This scanning is harmless and does not pose any risk to the organization, this scanning is part of PANs normal operations and is done to ensure the security and effectiveness of our URL Filtering service.

Kind regards,

-Kim.

[Samson_Colaco]

Is there any defined IP subnet by palo alto for web crawling , if so sharing the same would really help alot.

[kiwi]

Hi @Samson_Colaco ,

I'm not aware of the specific IPs for webcrawling but the entire /24 seems to be assigned to PAN:

NetRange:       65.154.226.0 - 65.154.226.255
CIDR:           65.154.226.0/24
NetName:        Q0123-65-154-226-0
NetHandle:      NET-65-154-226-0-1
Parent:         CENTURYLINK-LEGACY-QWEST-INET-18 (NET-65-128-0-0-1)
NetType:        Reassigned
OriginAS:       AS209
Organization:   PALO ALTO NETWORKS (PALOA)
RegDate:        2020-01-23
Updated:        2020-01-23
Ref:            https://rdap.arin.net/registry/ip/65.154.226.0

Kind regards,

-Kim.