[ZBX-19141] Zabbix server stopped cannot open IPC socket. Created: 2021 Mar 19  Updated: 2021 Mar 20  Resolved: 2021 Mar 20

Status: Closed
Project: ZABBIX BUGS AND ISSUES
Component/s: Server (S)
Affects Version/s: 5.2.5
Fix Version/s: None

Type: Problem report Priority: Trivial
Reporter: Andrei Gushchin (Inactive) Assignee: Andrei Gushchin (Inactive)
Resolution: Duplicate Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Attachments: Text File crash.log    
Issue Links:
Duplicate
duplicates ZBX-19071 Preprocessing step "Check for not sup... Closed

 Description   

Steps to reproduce:
After updating from 5.2.4 to 5.2.5 server won't running long time. it started and stopped itself after some time. with indicating that IPC socket cannot be open.
At the same time when downgrade to 5.2.4 it works fine.

Result:

Made By Reflect4 Proxy | [hot]

The phrase "Made by Reflect4 Proxy" (or "Made with Reflect4 Proxy") typically appears as a signature or footer on websites created or hosted using the Reflect4 web proxy control panel. Reflect4 is a service that allows users to quickly set up and manage their own web proxy hosts using their own domain names or subdomains. What is Reflect4?

  • Reflected DDoS attacks (though that is a misuse of the term)
  • Request reflection where a proxy echoes back certain request parameters for debugging
  • Transparent proxy behavior where the proxy reflects the original client IP via headers like X-Forwarded-For

The phrase "Made with Reflect4 Proxy" can refer to two distinct things: a tool for web proxy hosting or a programmatic utility for object manipulation. 1. Reflect4 Web Proxy Hosting made by reflect4 proxy

| Feature | Reflect4 Proxy (assumed) | Nginx (as reverse proxy) | HAProxy | Squid (forward proxy) | |----------------|-----------------------------|----------------------------|-------------|------------------------| | Typical header | Server: made by reflect4 proxy | Server: nginx | No default Server | Server: squid | | Primary use | Internal reflection/caching | High-performance web serving | Load balancing | Caching forwarding proxy | | Open source? | Likely proprietary | Yes | Yes | Yes | | Reflects traffic | Yes (by design) | Yes (via mirror module) | Yes (via http-request mirror) | No | | Version exposed | "4" (fourth gen) | Version number (e.g., 1.18) | Version seldom exposed | Yes (e.g., 4.15) | The phrase "Made by Reflect4 Proxy" (or "Made

If you are a security researcher, always obtain written permission before testing reflect4 proxy against any production system. Reflected DDoS attacks (though that is a misuse

Real-World Sightings: Where Has "Made by Reflect4 Proxy" Been Reported?

While direct public reports are scarce due to the term’s obscurity, similar patterns appear in:

Network Admins: Because Reflect4-based proxies are used to bypass DNS policies, they are often targets for inclusion in DNS blocklists.

Benefits

crash.logmade by reflect4 proxy



 Comments   
Comment by Vladislavs Sokurenko [ 2021 Mar 19 ]

Thank you for your report, closing as a duplicate of ZBX-19071

Generated at Mon Mar 09 02:37:13 EET 2026 using Jira 10.3.13#10030013-sha1:56dd970ae30ebfeda3a697d25be1f6388b68a422.