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iamsajjad's avatar
iamsajjad
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Mar 31, 2022

Problem applying 2 EC certs to a VS - NET::ERR_CERT_COMMON_NAME_INVALID

We have a virtual server that is currently configured for SSL Offloading using an L1F EC cert by Entrust. Current cert has about 240 SANs. Customer wants to add few more SANs. To manage it efficientl...
application delivery
  • MaximP's avatar
    MaximP
    Apr 06, 2022

     

    About common name field, it was suggestion. According to link below in 14.1.4 version it isn't necessary. F5 matches SNI with SAN list.

    Unfortunately, I don't have any more ideas how to solve it. Looks like a bug and reason to open a support case. 

    https://support.f5.com/csp/article/K13452

    "For Server Name, enter the name of the HTTPS site.

    Note: Beginning in BIG-IP 11.6.0, if you leave Server Name blank, the BIG-IP system reads the Subject Alternative Name (SAN) from the certificate. For versions prior to BIG-IP 11.6.0, if you leave Server Name blank, the BIG-IP system reads the Common Name (CN) from the certificate. Additionally, the Server Name setting supports wildcard strings containing the asterisk (*) character. For example, *.domain.com matches a.domain.com or a.bc.domain.com, but it does not match domain.com)."

MaximP's avatar
MaximP
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Sajjadm, hello.

Can you share SSL Profiles and vs text configuration?

iamsajjad's avatar
iamsajjad
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Apr 01, 2022

Thanks for responding. Some sensitive info retracted/altered. Here is the gist of it:

ltm virtual srv404s_services_http_443 {
destination 123.x.y.z:https
ip-protocol tcp
mask 255.255.255.255
persist {
source_addr {
default yes
}
}
pool srv404s_services_any_http_80_pool
profiles {
http_IT-Compliant { }
srv404s_services_Board-IT-Compliant {
context clientside
}
srv404s_services_Board-IT-Compliant-ExtraSANs {
context clientside
}
tcp { }
}
rules {
SNAT-201to201
}
source 0.0.0.0/0
translate-address enabled
translate-port enabled
vlans {
...
}
vlans-enabled
}

 

 

ltm profile client-ssl srv404s_services_Board-IT-Compliant {
app-service none
cert none
cert-key-chain {
ECDSA-services.com_ESDC-Intermediate_0 {
cert ECDSA-services.com.crt
chain ESDC-Intermediate
key ECDSA-services.com.key
}
}
chain none
cipher-group IT-Compliant
ciphers none
defaults-from equite.com
inherit-ca-certkeychain true
inherit-certkeychain false
key none
passphrase none
sni-default true
}

 


ltm profile client-ssl srv404s_services_Board-IT-Compliant-ExtraSANs {
app-service none
cert-key-chain {
ECDSA-services.com_Extra_SANs_canlearn_ECDSA-Intermediate_0 {
cert ECDSA-services.com_Extra_SANs_canlearn
chain ECDSA-Intermediate.crt
key ECDSA-services.com_Extra_SANs_canlearn
}
}
cipher-group IT-Compliant
ciphers none
defaults-from clientssl
inherit-ca-certkeychain true
inherit-certkeychain false
}

Thanks,

 

SajjadM