Hello, I'm trying to fix this problem for a while (month probably). I'm not able to find an solution via google. If someone could help me out I would appreciate. Screenplay: I'm starting server under chroot with /proc and /dev/pts mounted. Everything is fine, clients can connect to the server. After a while (approx 24h) "something" is happening and server rejects connections. output(-vvv enabled): OpenSSH_5.2p1, OpenSSL 0.9.8l 5 Nov 2009 debug1: Reading configuration data /etc/ssh/ssh_config debug2: ssh_connect: needpriv 0 debug1: Connecting to ***.***.***.*** port 22. debug1: Connection established. debug1: identity file /home/user/.ssh/identity type -1 debug1: identity file /home/user/.ssh/id_rsa type -1 debug1: identity file /home/user/.ssh/id_dsa type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.2 debug1: match: OpenSSH_5.2 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.2 debug2: fd 3 setting O_NONBLOCK debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received 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-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@xxxxxxxxxxxxxx debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@xxxxxxxxxxxxxx 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,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-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@xxxxxxxxxxxxxx debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@xxxxxxxxxxxxxx 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_setup: found hmac-md5 debug1: kex: server->client aes128-ctr hmac-md5 none debug2: mac_setup: found hmac-md5 debug1: kex: client->server aes128-ctr 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: 137/256 debug2: bits set: 495/1024 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug3: check_host_in_hostfile: filename /home/user/.ssh/known_hosts debug3: check_host_in_hostfile: match line 2 debug1: Host '***.***.***.***' is known and matches the RSA host key. debug1: Found key in /home/user/.ssh/known_hosts:2 debug2: bits set: 526/1024 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 debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /home/user/.ssh/identity ((nil)) debug2: key: /home/user/.ssh/id_rsa ((nil)) debug2: key: /home/user/.ssh/id_dsa ((nil)) debug1: Authentications that can continue: publickey,password,keyboard-interactive debug3: start over, passed a different list publickey,password,keyboard-interactive debug3: preferred publickey,keyboard-interactive,password debug3: authmethod_lookup publickey debug3: remaining preferred: keyboard-interactive,password debug3: authmethod_is_enabled publickey debug1: Next authentication method: publickey debug1: Trying private key: /home/user/.ssh/identity debug3: no such identity: /home/user/.ssh/identity debug1: Trying private key: /home/user/.ssh/id_rsa debug3: no such identity: /home/user/.ssh/id_rsa debug1: Trying private key: /home/user/.ssh/id_dsa debug3: no such identity: /home/user/.ssh/id_dsa debug2: we did not send a packet, disable method debug3: authmethod_lookup keyboard-interactive debug3: remaining preferred: password debug3: authmethod_is_enabled keyboard-interactive debug1: Next authentication method: keyboard-interactive debug2: userauth_kbdint debug2: we sent a keyboard-interactive packet, wait for reply debug1: Authentications that can continue: publickey,password,keyboard-interactive debug3: userauth_kbdint: disable: no info_req_seen debug2: we did not send a packet, disable method debug3: authmethod_lookup password debug3: remaining preferred: debug3: authmethod_is_enabled password debug1: Next authentication method: password user@***.***.***.***'s password: debug3: packet_send2: adding 48 (len 61 padlen 19 extra_pad 64) debug2: we sent a password packet, wait for reply debug1: Authentication succeeded (password). debug1: channel 0: new [client-session] debug3: ssh_session2_open: channel_new: 0 debug2: channel 0: send open debug1: Requesting no-more-sessions@xxxxxxxxxxx debug1: Entering interactive session. debug2: callback start debug2: client_session2_setup: id 0 debug2: channel 0: request pty-req confirm 1 debug2: channel 0: request shell confirm 1 debug2: fd 3 setting TCP_NODELAY debug2: callback done debug2: channel 0: open confirm rwindow 0 rmax 32768 debug1: channel 0: free: client-session, nchannels 1 debug3: channel 0: status: The following connections are open: #0 client-session (t4 r0 i0/0 o0/0 fd 4/5 cfd -1) debug3: channel 0: close_fds r 4 w 5 e 6 c -1 Connection to ***.***.***.*** closed by remote host. Connection to ***.***.***.*** closed. Transferred: sent 1712, received 1864 bytes, in 0.0 seconds Bytes per second: sent 69715.3, received 75904.9 debug1: Exit status -1 On the server in logs I have: Mar 29 06:59:25 localhost sshd_ch[15900]: Accepted password for user from ***.***.***.*** port 58520 ssh2 Mar 29 06:59:25 localhost sshd_ch[15900]: fatal: openpty returns device for which ttyname fails. Mar 29 06:59:25 localhost sshd_ch[15900]: syslogin_perform_logout: logout() returned an error Mar 29 06:59:25 localhost sshd_ch[15900]: error: chown 0 0 failed: No such file or directory Mar 29 06:59:25 localhost sshd_ch[15900]: error: chmod 0666 failed: No such file or directory Mar 29 06:59:35 localhost sshd_ch[15905]: Accepted password for user from ***.***.***.*** port 58521 ssh2 Mar 29 06:59:35 localhost sshd_ch[15905]: fatal: openpty returns device for which ttyname fails. Mar 29 06:59:35 localhost sshd_ch[15905]: syslogin_perform_logout: logout() returned an error Mar 29 06:59:35 localhost sshd_ch[15905]: error: chown 0 0 failed: No such file or directory Mar 29 06:59:35 localhost sshd_ch[15905]: error: chmod 0666 failed: No such file or directory I really would like to run this server correctly... Let me know if any further information is needed. Thanks in advance. Marcin Grinberg
