Hi, I just installed openSSH2.1.0 an a linux system and tried to connect to a server running an SSH2 server. Unfortunately I wasn't able to connect because of a signature error. I am connecting to the host for the first time. Does anybody know, why I have this problem and why I can't connect? Thanks, Stefan Mangard Here is the debug output: [smang at grad1 bin]$ ssh -2 -v galaxy.acm.jhu.edu SSH Version OpenSSH-2.1, protocol versions 1.5/2.0. Compiled with SSL (0x0090581f). debug: Reading configuration data /home/smang/etc/ssh_config debug: Applying options for * debug: ssh_connect: getuid 544 geteuid 544 anon 1 debug: Connecting to galaxy.acm.jhu.edu [128.220.223.65] port 22. debug: Connection established. debug: Remote protocol version 1.99, remote software version 2.0.13 (non-commercial) datafellows: 2.0.13 (non-commercial) Enabling compatibility mode for protocol 2.0 debug: Local version string SSH-2.0-OpenSSH-2.1 debug: Sending KEX init. debug: Seeding random number generator debug: done debug: got kexinit string: diffie-hellman-group1-sha1 debug: got kexinit string: ssh-dss debug: got kexinit string: 3des-cbc,blowfish-cbc,twofish-cbc,arcfour,none debug: got kexinit string: 3des-cbc,blowfish-cbc,twofish-cbc,arcfour,none debug: got kexinit string: hmac-md5,md5-8,none debug: got kexinit string: hmac-md5,md5-8,none debug: got kexinit string: none,zlib debug: got kexinit string: none,zlib debug: got kexinit string: debug: got kexinit string: debug: first kex follow == 0 debug: reserved == 0 debug: done read kexinit debug: kex: server->client 3des-cbc hmac-md5 none debug: kex: client->server 3des-cbc hmac-md5 none debug: Sending SSH2_MSG_KEXDH_INIT. debug: bits set: 531/1024 debug: Wait SSH2_MSG_KEXDH_REPLY. debug: Got SSH2_MSG_KEXDH_REPLY. debug: keytype ssh-dss The authenticity of host 'galaxy.acm.jhu.edu' can't be established. DSA key fingerprint is 6a:1d:ca:98:3f:cb:1a:ac:a7:ba:3f:60:51:8d:39:7d. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'galaxy.acm.jhu.edu,128.220.223.65' (DSA) to the list of knn hosts. debug: bits set: 510/1024 debug: len 40 datafellows 15 debug: dsa_verify: signature incorrect dsa_verify failed for server_host_key debug: Calling cleanup 0x8059884(0x0)