Tried to re-add 2 computers to the project and receive the following error message:
Can not add project AddProject: Error -184

Below is the info from Event Log showing the FAILED ATTEMPT to attach >>>

5/15/2025 23:09:04 Fetching configuration file from http://boinc.multi-pool.info/latinsquares/get_project_config.php
5/15/2025 23:09:04 [http] HTTP_OP::init_get(): http://boinc.multi-pool.info/latinsquares/get_project_config.php
5/15/2025 23:09:04 [http] [ID#10] Info: Connection 2298 seems to be dead
5/15/2025 23:09:04 [http] [ID#10] Info: Closing connection
5/15/2025 23:09:04 [http] [ID#10] Info: schannel: shutting down SSL/TLS connection with root.ithena.net port 443
5/15/2025 23:09:04 [http] [ID#10] Info: Host boinc.multi-pool.info:80 was resolved.
5/15/2025 23:09:04 [http] [ID#10] Info: IPv6: fe80::2c0:8ff:fe8f:b680
5/15/2025 23:09:04 [http] [ID#10] Info: IPv4: 188.75.184.38
5/15/2025 23:09:04 [http] [ID#10] Info: Trying 188.75.184.38:80...
5/15/2025 23:09:04 [http] [ID#10] Info: Connected to boinc.multi-pool.info (188.75.184.38) port 80
5/15/2025 23:09:04 [http] [ID#10] Sent header to server: GET /latinsquares/get_project_config.php HTTP/1.1
5/15/2025 23:09:04 [http] [ID#10] Sent header to server: Host: boinc.multi-pool.info
5/15/2025 23:09:04 [http] [ID#10] Sent header to server: User-Agent: BOINC client (windows_x86_64 8.0.4)
5/15/2025 23:09:04 [http] [ID#10] Sent header to server: Accept: */*
5/15/2025 23:09:04 [http] [ID#10] Sent header to server: Accept-Encoding: deflate, gzip
5/15/2025 23:09:04 [http] [ID#10] Sent header to server: Accept-Language: en_US
5/15/2025 23:09:04 [http] [ID#10] Sent header to server:
5/15/2025 23:09:04 [http] [ID#10] Info: Request completely sent off
5/15/2025 23:09:04 [http] [ID#10] Received header from server: HTTP/1.1 308 Permanent Redirect
5/15/2025 23:09:04 [http] [ID#10] Received header from server: Date: Fri, 16 May 2025 04:07:59 GMT
5/15/2025 23:09:04 [http] [ID#10] Received header from server: Content-Type: text/html
5/15/2025 23:09:04 [http] [ID#10] Received header from server: Content-Length: 164
5/15/2025 23:09:04 [http] [ID#10] Received header from server: Connection: keep-alive
5/15/2025 23:09:04 [http] [ID#10] Received header from server: Location: https://boinc.multi-pool.info/latinsquares/get_project_config.php
5/15/2025 23:09:04 [http] [ID#10] Received header from server:
5/15/2025 23:09:04 [http] [ID#10] Info: Ignoring the response-body
5/15/2025 23:09:04 [http] [ID#10] Info: Connection #2299 to host boinc.multi-pool.info left intact
5/15/2025 23:09:04 [http] [ID#10] Info: Clear auth, redirects to port from 80 to 443
5/15/2025 23:09:04 [http] [ID#10] Info: Issue another request to this URL: 'https://boinc.multi-pool.info/latinsquares/get_project_config.php'
5/15/2025 23:09:04 [http] [ID#10] Info: Host boinc.multi-pool.info:443 was resolved.
5/15/2025 23:09:04 [http] [ID#10] Info: IPv6: fe80::2c0:8ff:fe8f:b680
5/15/2025 23:09:04 [http] [ID#10] Info: IPv4: 188.75.184.38
5/15/2025 23:09:04 [http] [ID#10] Info: Trying 188.75.184.38:443...
5/15/2025 23:09:04 [http] [ID#10] Info: Connected to boinc.multi-pool.info (188.75.184.38) port 443
5/15/2025 23:09:04 [http] [ID#10] Info: schannel: disabled automatic use of client certificate
5/15/2025 23:09:04 [http] [ID#10] Info: ALPN: curl offers http/1.1
5/15/2025 23:09:04 [http] [ID#10] Info: schannel: next InitializeSecurityContext failed: SEC_E_ILLEGAL_MESSAGE (0x80090326) - This error usually occurs when a fatal SSL/TLS alert is received (e.g. handshake failed). More detail may be available in the Windows System event
5/15/2025 23:09:04 [http] [ID#10] Info: Closing connection
5/15/2025 23:09:04 [http] [ID#10] Info: schannel: shutting down SSL/TLS connection with boinc.multi-pool.info port 443
5/15/2025 23:09:04 [http] HTTP error: SSL connect error

Hi,

can you verify if this works (can be run from linux bash or windows powershell):

curl -v https://boinc.multi-pool.info/latinsquares/get_project_config.php

thanks

Still unable to RE-attach to project almost 1 year later.

Computer details:
https://boinc.multi-pool.info/latinsquares/show_host_detail.php?hostid=62

GenuineIntel Pentium(R) Dual-Core CPU E5400 @ 2.70GHz [Family 6 Model 23 Stepping 10] (2 processors)
Microsoft Windows 7 Professional x64 Edition, Service Pack 1, (06.01.7601.00)

AddProject: Error -184
4/30/2026 07:30:06 Fetching configuration file from https://boinc.multi-pool.info/latinsquares/get_project_config.php
4/30/2026 07:30:08 Project communication failed: attempting access to reference site
4/30/2026 07:30:10 Internet access OK - project servers may be temporarily down.
4/30/2026 07:30:15 Fetching configuration file from https://boinc.multi-pool.info/latinsquares/get_project_config.php
4/30/2026 07:30:17 Project communication failed: attempting access to reference site
4/30/2026 07:30:19 Internet access OK - project servers may be temporarily down.

C:\Program Files\Git\mingw64\bin>curl -v https://boinc.multi-pool.info/latinsqua
res/get_project_config.php
* Host boinc.multi-pool.info:443 was resolved.
* IPv6: (none)
* IPv4: 188.75.184.38
* Trying 188.75.184.38:443...
* Failed to set TCP_KEEPINTVL on fd 156: errno 10042
* Failed to set TCP_KEEPCNT on fd 156: errno 10042
* Connected to boinc.multi-pool.info (188.75.184.38) port 443
* schannel: disabled automatic use of client certificate
* schannel: next InitializeSecurityContext failed: SEC_E_ILLEGAL_MESSAGE (0x80090326) - This error usually occurs when a fatal SSL/TLS alert is received (e.g. handshake failed). More detail may be available in the Windows System event log.* closing connection #0
curl: (35) schannel: next InitializeSecurityContext failed: SEC_E_ILLEGAL_MESSAGE (0x80090326) - This error usually occurs when a fatal SSL/TLS alert is received (e.g. handshake failed). More detail may be available in the Windows System event log.

Still waiting for an answer 11 days later

Still unable to RE-attach to project almost 1 year later.

Computer details:
https://boinc.multi-pool.info/latinsquares/show_host_detail.php?hostid=62

GenuineIntel Pentium(R) Dual-Core CPU E5400 @ 2.70GHz [Family 6 Model 23 Stepping 10] (2 processors)
Microsoft Windows 7 Professional x64 Edition, Service Pack 1, (06.01.7601.00)

AddProject: Error -184
4/30/2026 07:30:06 Fetching configuration file from https://boinc.multi-pool.info/latinsquares/get_project_config.php
4/30/2026 07:30:08 Project communication failed: attempting access to reference site
4/30/2026 07:30:10 Internet access OK - project servers may be temporarily down.
4/30/2026 07:30:15 Fetching configuration file from https://boinc.multi-pool.info/latinsquares/get_project_config.php
4/30/2026 07:30:17 Project communication failed: attempting access to reference site
4/30/2026 07:30:19 Internet access OK - project servers may be temporarily down.

C:\Program Files\Git\mingw64\bin>curl -v https://boinc.multi-pool.info/latinsqua
res/get_project_config.php
* Host boinc.multi-pool.info:443 was resolved.
* IPv6: (none)
* IPv4: 188.75.184.38
* Trying 188.75.184.38:443...
* Failed to set TCP_KEEPINTVL on fd 156: errno 10042
* Failed to set TCP_KEEPCNT on fd 156: errno 10042
* Connected to boinc.multi-pool.info (188.75.184.38) port 443
* schannel: disabled automatic use of client certificate
* schannel: next InitializeSecurityContext failed: SEC_E_ILLEGAL_MESSAGE (0x80090326) - This error usually occurs when a fatal SSL/TLS alert is received (e.g. handshake failed). More detail may be available in the Windows System event log.* closing connection #0
curl: (35) schannel: next InitializeSecurityContext failed: SEC_E_ILLEGAL_MESSAGE (0x80090326) - This error usually occurs when a fatal SSL/TLS alert is received (e.g. handshake failed). More detail may be available in the Windows System event log.

Unfortunately, your questions are not correct.

Why?

You have Windows 7 OS.
Support for modern encryption chippers and TCP/IP protocol extensions only became available starting with Windows 10 version 1703 (TCP_KEEPCNT from 1703, TCP_KEEPINTVL from 1709).
Sorry.

https://learn.microsoft.com/en-us/windows/win32/winsock/ipproto-tcp-socket-options#windows-support-for-ipproto_tcp-options

https://github.com/curl/curl/discussions/19520
https://www.ssllabs.com/ssltest/analyze.html?d=boinc.multi-pool.info