SFTP FIPS Connection issue

Report client bugs
Post Reply
mvoggenreiter
Posts: 1
Joined: Wed Jun 27, 2018 12:04 pm

SFTP FIPS Connection issue

Post by mvoggenreiter »

Hi,

since an external FTP Server with Cerberus FTP 8.0 has changed to FIPS, Core FTP Pro isn't able to connect anymore.
Connecting with FileZilla or Putty SFTP to this server works fine. I don't have further informations about what exactly has changed, but the servers description changed from SSH-2.0-CerberusFTPServer_8.0 to SSH-2.0-CerberusFTPServer_8.0 FIPS.

Output of connection attempt before change:
SSH-2.0-CerberusFTPServer_8.0
ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
client cipher -> aes256-ctr
client->server mac : sha2-512
server cipher -> aes256-ctr
server->client mac : sha2-512

Output of connection attempt after change (replaced the real hostname with ftp.example.com):
SSH-2.0-CerberusFTPServer_8.0 FIPS
ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
client cipher -> aes256-ctr
client->server mac : sha2-512
server cipher -> aes256-ctr
server->client mac : sha2-512
Disconnected
Kex reply failure
SFTP connection errorReconnectWaiting 1 of 60 seconds for retry #1...
Waiting 2 of 60 seconds for retry #1...
Waiting 3 of 60 seconds for retry #1...
Waiting 4 of 60 seconds for retry #1...
Waiting 5 of 60 seconds for retry #1...
Waiting 6 of 60 seconds for retry #1...
Waiting 7 of 60 seconds for retry #1...
Waiting 8 of 60 seconds for retry #1...
Waiting 9 of 60 seconds for retry #1...
Waiting 10 of 60 seconds for retry #1...
Waiting 11 of 60 seconds for retry #1...
Waiting 12 of 60 seconds for retry #1...
Waiting 13 of 60 seconds for retry #1...
Waiting 14 of 60 seconds for retry #1...
Waiting 15 of 60 seconds for retry #1...
Waiting 16 of 60 seconds for retry #1...
Waiting 17 of 60 seconds for retry #1...
Waiting 18 of 60 seconds for retry #1...
Waiting 19 of 60 seconds for retry #1...
Waiting 20 of 60 seconds for retry #1...
Waiting 21 of 60 seconds for retry #1...
Waiting 22 of 60 seconds for retry #1...
Waiting 23 of 60 seconds for retry #1...
Waiting 24 of 60 seconds for retry #1...
Waiting 25 of 60 seconds for retry #1...
Waiting 26 of 60 seconds for retry #1...
Waiting 27 of 60 seconds for retry #1...
Waiting 28 of 60 seconds for retry #1...
Waiting 29 of 60 seconds for retry #1...
Waiting 30 of 60 seconds for retry #1...
Waiting 31 of 60 seconds for retry #1...
Waiting 32 of 60 seconds for retry #1...
Waiting 33 of 60 seconds for retry #1...
Waiting 34 of 60 seconds for retry #1...
Waiting 35 of 60 seconds for retry #1...
Waiting 36 of 60 seconds for retry #1...
Waiting 37 of 60 seconds for retry #1...
Waiting 38 of 60 seconds for retry #1...
Waiting 39 of 60 seconds for retry #1...
Waiting 40 of 60 seconds for retry #1...
Waiting 41 of 60 seconds for retry #1...
Waiting 42 of 60 seconds for retry #1...
Waiting 43 of 60 seconds for retry #1...
Waiting 44 of 60 seconds for retry #1...
Waiting 45 of 60 seconds for retry #1...
Waiting 46 of 60 seconds for retry #1...
Waiting 47 of 60 seconds for retry #1...
Waiting 48 of 60 seconds for retry #1...
Waiting 49 of 60 seconds for retry #1...
Waiting 50 of 60 seconds for retry #1...
Waiting 51 of 60 seconds for retry #1...
Waiting 52 of 60 seconds for retry #1...
Waiting 53 of 60 seconds for retry #1...
Waiting 54 of 60 seconds for retry #1...
Waiting 55 of 60 seconds for retry #1...
Waiting 56 of 60 seconds for retry #1...
Waiting 57 of 60 seconds for retry #1...
Waiting 58 of 60 seconds for retry #1...
Waiting 59 of 60 seconds for retry #1...
Waiting 60 of 60 seconds for retry #1...
Retry #1, Connecting to ftp.example.com...Resolving ftp.example.com...

Already tried to change Advanced Settings -> SSH -> "Use Putty compatible SFTP" and "FIPS mode", but didn't help.
Using Core FTP Pro v 2.2 build 1922.
Any suggestions?
Post Reply