Server: OpenSSH 5.1p1 Client: OpenSSH 4.3p2 Works fine when server is OpenSSH 4.4p1 instead (our old instance we're trying to upgrade to 5.1p1) Any ideas? Adding '-2' to the ssh command line buys me nothing. % /usr/local/bin/ssh -v -v -v -p 6000 sshserver OpenSSH_4.3p2, OpenSSL 0.9.8d 28 Sep 2006 debug1: Reading configuration data /usr/local/etc/ssh_config debug2: ssh_connect: needpriv 0 debug1: Connecting to sshserver [XX.YY.10.1] port 6000. debug1: Connection established. debug1: identity file /home/jblaine/.ssh/identity type -1 debug1: identity file /home/jblaine/.ssh/id_rsa type -1 debug1: identity file /home/jblaine/.ssh/id_dsa type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1 debug1: match: OpenSSH_5.1 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_4.3 debug2: fd 4 setting O_NONBLOCK debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@xxxxxxxxxxxxxx,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@xxxxxxxxxxxxxx,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@xxxxxxxxxxx,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@xxxxxxxxxxx,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,zlib@xxxxxxxxxxx,zlib debug2: kex_parse_kexinit: none,zlib@xxxxxxxxxxx,zlib debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@xxxxxxxxxxxxxx,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@xxxxxxxxxxxxxx,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@xxxxxxxxxxx,hmac-ripemd160,hmac-ripemd160@xxxxxxxxxxx,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@xxxxxxxxxxx,hmac-ripemd160,hmac-ripemd160@xxxxxxxxxxx,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,zlib@xxxxxxxxxxx debug2: kex_parse_kexinit: none,zlib@xxxxxxxxxxx debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: mac_init: found hmac-md5 debug1: kex: server->client aes128-cbc hmac-md5 none debug2: mac_init: found hmac-md5 debug1: kex: client->server aes128-cbc hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug2: dh_gen_key: priv key bits set: 113/256 debug2: bits set: 525/1024 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug3: check_host_in_hostfile: filename /home/jblaine/.ssh/known_hosts debug3: check_host_in_hostfile: filename /usr/local/etc/ssh_known_hosts debug3: check_host_in_hostfile: filename /home/jblaine/.ssh/known_hosts debug3: check_host_in_hostfile: filename /usr/local/etc/ssh_known_hosts debug3: check_host_in_hostfile: filename /home/jblaine/.ssh/known_hosts debug3: check_host_in_hostfile: filename /usr/local/etc/ssh_known_hosts debug2: no key of type 0 for host sshserver debug3: check_host_in_hostfile: filename /home/jblaine/.ssh/known_hosts2 debug3: check_host_in_hostfile: filename /usr/local/etc/ssh_known_hosts2 debug3: check_host_in_hostfile: filename /home/jblaine/.ssh/known_hosts debug3: check_host_in_hostfile: filename /usr/local/etc/ssh_known_hosts debug2: no key of type 2 for host sshserver The authenticity of host 'sshserver (XX.YY.10.1)' can't be established. RSA key fingerprint is 88:b0:14:81:c9:86:4f:a5:a8:96:87:f3:24:df:0c:8b. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'sshserver,XX.YY.10.1' (RSA) to the list of known hosts. debug2: bits set: 519/1024 debug1: ssh_rsa_verify: signature correct debug2: kex_derive_keys debug2: set_newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug2: set_newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent Disconnecting: Bad packet length 3346013531. bash-2.05# /custom/openssh-5.1p1/sbin/sshd -p 6000 -d debug1: sshd version OpenSSH_5.1p1 debug1: read PEM private key done: type RSA debug1: private host key: #0 type 1 RSA debug1: read PEM private key done: type DSA debug1: private host key: #1 type 2 DSA debug1: rexec_argv[0]='/linus/openssh-5.1p1/sbin/sshd' debug1: rexec_argv[1]='-p' debug1: rexec_argv[2]='6000' debug1: rexec_argv[3]='-d' debug1: Bind to port 6000 on ::. Server listening on :: port 6000. debug1: Bind to port 6000 on 0.0.0.0. Server listening on 0.0.0.0 port 6000. debug1: fd 6 clearing O_NONBLOCK debug1: Server will not fork when running in debugging mode. debug1: rexec start in 6 out 6 newsock 6 pipe -1 sock 11 debug1: inetd sockets after dupping: 4, 4 Connection from XX.YY.10.14 port 51518 debug1: Client protocol version 2.0; client software version OpenSSH_4.3 debug1: match: OpenSSH_4.3 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.1 debug1: permanently_set_uid: 27/65000 debug1: list_hostkey_types: ssh-rsa,ssh-dss debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: client->server aes128-cbc hmac-md5 none debug1: kex: server->client aes128-cbc hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST received debug1: SSH2_MSG_KEX_DH_GEX_GROUP sent debug1: expecting SSH2_MSG_KEX_DH_GEX_INIT debug1: SSH2_MSG_KEX_DH_GEX_REPLY sent debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: KEX done Disconnecting: Bad packet length 2596886957. debug1: do_cleanup debug1: do_cleanup bash-2.05#
