> On 6 Jan 2026, at 22:06, Van Remoortere, Arnaud via 389-users 
> <[email protected]> wrote:
> 
> Hi, I'm following the instructions to setup replication in CHAPTER 2. 
> CONFIGURING SINGLE-SUPPLIER REPLICATION 
> <https://docs.redhat.com/en-us/documentation/red_hat_directory_server/12/pdf/configuring_and_managing_replication/Red_Hat_Directory_Server-12-Configuring_and_managing_replication-en-US.pdf>
> USING THE WEB CONSOLE 
> <https://docs.redhat.com/en-us/documentation/red_hat_directory_server/12/pdf/configuring_and_managing_replication/Red_Hat_Directory_Server-12-Configuring_and_managing_replication-en-US.pdf>
>  
> 
> I get a "Error (-1) - LDAP error: Can't contact LDAP server - no response 
> received " in the GUI
> 
> The logs on supplier say this:
> 
> [06/Jan/2026:11:47:51.180037306 +0000] - ERR - slapi_ldap_bind - Could not 
> send bind request for id [cn=replication manager,cn=config] authentication 
> mechanism [SIMPLE]: error -1 (Can't contact LDAP server), system error -5987 
> (Invalid function argument.), network error 0 (Unknown error, host 
> "second.xxx.com:636 <http://second.xxx.com:636/>")
> 
> LDAPS definitely is enabled and working on the secondary though, I've used 
> ldapsearch to confirm it:
> 
> ldapsearch -x -b ou=users,dc=com -H ldaps://second.xxx.com -D 
> "cn=ldap_ro,dc=com" -W

If you run this command from the primary does it connect correctly? Can you do 
the same bind with the replication manager? 

> 
> The logs on the consumer don't show anything strange
> 
> There's no failed bind so it's not getting that far. 
> 
> Suspecting that it might have something to do with the self signed ssl I've 
> added the primary CA cert to the secondary and vice versa, Trusted 
> Certificate Authorities but no joy. 
> 
> Any help appreciated
> Arnaud
> -- 
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-- 
Sincerely,

William Brown

Senior Software Engineer,
Identity and Access Management
SUSE Labs, Australia

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