ssh2 algorithm key-exchange
Use ssh2 algorithm key-exchange to specify key exchange algorithms for SSH2.
Use undo ssh2 algorithm key-exchange to restore the default.
Syntax
In non-FIPS mode:
ssh2 algorithm key-exchange { dh-group-exchange-sha1 | dh-group1-sha1 | dh-group14-sha1 | ecdh-sha2-nistp256 | ecdh-sha2-nistp384 } *
undo ssh2 algorithm key-exchange
In FIPS mode:
ssh2 algorithm key-exchange { dh-group14-sha1 | ecdh-sha2-nistp256 | ecdh-sha2-nistp384 } *
undo ssh2 algorithm key-exchange
Default
SSH2 uses key exchange algorithms ecdh-sha2-nistp256, ecdh-sha2-nistp384, diffie-hellman-group-exchange-sha1, diffie-hellman-group14-sha1, and diffie-hellman-group1-sha1 in descending order of priority for algorithm negotiation.
Views
System view
Predefined user roles
network-admin
mdc-admin
Parameters
dh-group-exchange-sha1: Specifies key exchange algorithm diffie-hellman-group-exchange-sha1.
dh-group1-sha1: Specifies key exchange algorithm diffie-hellman-group1-sha1.
dh-group14-sha1: Specifies key exchange algorithm diffie-hellman-group14-sha1.
ecdh-sha2-nistp256: Specifies key exchange algorithm ecdh-sha2-nistp256.
ecdh-sha2-nistp384: Specifies key exchange algorithm ecdh-sha2-nistp384.
Usage guidelines
If you specify the key exchange algorithms, SSH2 uses only the specified algorithms for algorithm negotiation. The algorithm specified earlier has a higher priority during negotiation.
Examples
# Specify algorithm dh-group1-sha1 as the key exchange algorithm for SSH2.
<Sysname> system-view [Sysname] ssh2 algorithm key-exchange dh-group1-sha1
Related commands
display ssh2 algorithm
ssh2 algorithm cipher
ssh2 algorithm mac
ssh2 algorithm public-key