Server certificate support matrix on the ADC appliance
From release 13.0 build 41.x, the ADC appliance supports server certificate messages that are fragmented into more than one record if the total size is within 32 KB. Earlier, the maximum supported size was 16 KB and fragmentation was not supported.
The Citrix ADC appliance supports the following server certificates.
Table 1: Support on front-end (FE) and back-end (BE) service
| Server certificate/Platform | MPX/SDX (N2 CHIPS) FE | MPX/SDX (N2 CHIPS) BE | MPX/SDX (N3 CHIPS) FE | MPX/SDX (N3 CHIPS) BE | VPX FE | VPX BE |
|---|---|---|---|---|---|---|
| MD5 | Y | Y | Y | Y | Y | Y |
| SHA1 | Y | Y | Y | Y | Y | Y |
| SHA224 | Y | Y | Y | Y | Y | Y |
| SHA256 | Y | Y | Y | Y | Y | Y |
| SHA384 | Y | Y | Y | Y | Y | Y |
| SHA512 | Y | Y | Y | Y | Y | Y |
| RSA Key | 1024, 2048, 3072, and 4096 bits | 1024, 2048, 3072, and 4096 bits | 1024, 2048, 3072, and 4096 bits | 1024, 2048, 3072, and 4096 bits | 1024, 2048, 3072, and 4096 bits | 1024, 2048, 3072, and 4096 bits |
| DH Key | 1024 bits and 2048 bits | 1024 bits and 2048 bits | 1024 bits and 2048 bits | 1024 bits and 2048 bits | 1024, 2048, 3072, and 4096 bits | 1024, 2048, 3072, and 4096 bits |
| Server certificate/Platform | MPX 9700/10500/12500/15500 FIPS with FW 2.2 FE | MPX 9700/10500/12500/15500 FIPS with FW 2.2 BE | MPX/SDX 14030/14060/14080 FIPS FE | MPX/SDX 14030/14060/14080 FIPS BE |
|---|---|---|---|---|
| MD5 | Y | Y | Y | Y |
| SHA1 | Y | Y | Y | Y |
| SHA224 | Y | Y | Y | Y |
| SHA256 | Y | Y | Y | Y |
| SHA384 | Y | Y | Y | Y |
| SHA512 | Y | Y | Y | Y |
| RSA Key | 2048 bits | 2048 bits | 2048 bits and 3072 bits | 2048 bits and 3072 bits |
| DH Key | N | N | N | N |
Notes
- 4k certificates require higher CPU cycles and might affect the performance of low-end appliances.
- In release 11.1 and earlier, a Citrix ADC appliance supports the following “signature algorithms” extensions in the back end client hello message: RSA-MD5, RSA-SHA1, and RSA-SHA256. The Citrix ADC appliance does not support SHA 384 and SHA 512 signature algorithms extensions. Therefore some servers, such as Windows IIS servers, reset the connection.
- Starting release 12.0, a Citrix ADC appliance supports all the signature_algorithms extensions.
Server certificate support matrix on the ADC appliance
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