This is a limitation of eclipse. As workaround please use:
"The error appears when a 1024 Diffie-Hellman key is necessary on the target and can't be generated based on the existing /etc/ssh/moduli file. Generating the necessary moduli file can be achieved using the following commands:
ssh-keygen -G moduli-1024.candidates -b 1024
ssh-keygen -T moduli-1024 -f moduli-1024.candidates
Continue with replacing the system-wide moduli file with the output file moduli-1024."
Adrian