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  • xrdp setup over ssh

    - by Xianlin
    Here are the steps to install xrdp on ubuntu 12.04 and get it working: http://www.ubuntututorials.com/remote-desktop-ubuntu-12-04-windows-7/ However, I want a secure xrdp connection over ssh and I am able to achieve it by using port forwarding in the software putty as below: L1234 == localhost:3389 But I am still able to remote login to the ubuntu through xrdp connection when I am not connected using SSH. It is supposed to deny remote login when SSH is not present. In the file /etc/xrdp/xrdp.ini I tried to change the [global] section by adding "ip=127.0.0.1" and it didn't work.

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  • Download a file over an active SSH session

    - by Oli
    So I'm SSHed into my Ubuntu server from my Ubuntu desktop. I'm at a certain path and I want to download a file to my local filesystem (preferably the path I was at before I entered the SSH session). I could mount SSH and pull the file across by mouse but what if I was trying to get a root file and logging in by root directly is disallowed? Even if that wasn't the case (it isn't now), surely there must be a simple way of pulling back a file over an active SSH connection. Surely!

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  • ssh:connection timed out

    - by user1155299
    I am trying the following command on ubuntu ssh [email protected] and I get the following error: ssh: connect to host xx.xx.xxx.xxx port 22: Connection timed out so, I tried the following: telnet xx.xx.xxx.xxx 22xx and I got the following message: Trying xx.xx.xxx.xxx... Connected to xx.xx.xxx.xxx. Escape character is '^]'. SSH-2.0-OpenSSH_5.5 Connection closed by foreign host. Can anyone help me understand what the problem is and how I can fix it.

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  • Having XP VM use my host OSX ssh tunnel to connect to a remote site?

    - by Manachi
    I am using Mac OSX and have Windows XP running on VMWare Fusion. I'm creating an ssh tunnel from OSX to a remote server, and then trying to have Windows XP use that tunnel (I actually use a program called Proxifier on XP to filter my XP MS SQL Server traffic through that tunnel) Note that I can successfully create an ssh tunnel (on port 9333) from the XP putty to the remote host, and have SQL Server Proxify through that tunnel and it all works correctly. However when I try to set up the tunnel in OSX, and have Proxifier in XP point to the OSX tunnel instead of localhost, it doesn't seem to connect. Here is the OSX command i'm using to create the tunnel: ssh -i /my/key -p 9001 -D 9333 -g me@remotehostname Then I set my XP proxifier to point to macosxhostname:9333 (instead of the previous localhost:9333 which worked corrently when using putty) Any suggestions on what I may have missed? My XP firewall is turned off while setting this up.

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  • using python Paramiko for ssh: sudo: no tty present and no askpass program specified

    - by misteryes
    I want to use paramiko to ssh into a bunch a remote nodes and run some command line with root priviledge I have ssh key in my home directory and so i don't need to input password when I ssh into those remote nodes but when running the following script: def connect(hostname): ssh = paramiko.SSHClient() ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy()) ssh.connect(hostname, username='niky', pkey=paramiko.RSAKey.from_private_key(open('id_rsa'), 'passwd'), timeout = 240.0) return ssh def run(hostname): ssh = connect(hostname) (stdin, stdout, stderr) = ssh.exec_command("sudo ls") res = stderr.readlines() print hostname+': '+''.join(str(elem) for elem in res)+'\n' run(remote.nity.com) I got the following error: remote.nity.com: sudo: no tty present and no askpass program specified if I don't add sudo before ls everything works fine what are potential reasons ? thanks!

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  • SSH not working over IPSec tunnel (Strongswan)

    - by PattPatel
    I configured a small network on a cloud virtual machine. This virtual machine has a static IP address assigned to eth0 interface that I'll call $EXTIP. mydomain.com points to $EXTIP. Inside, I have some linux containers, that get their ip through DHCP in the Subnet 10.0.0.0/24 (i called the virtual interface nat ). They run some services that can be reached through DNAT. Then I wanted to connect to these containers through an IPSec tunnel, so I configured StrongSwan. ipsec.conf: conn %default dpdaction=none rekey=no conn remote keyexchange=ikev2 ike=######## left=[$EXTIP] leftsubnet=10.0.1.0/24,10.0.0.0/24 leftauth=pubkey lefthostaccess=yes leftcert=########.pem leftfirewall=yes leftid="#########" right=%any rightsourceip=10.0.1.0/24 rightauth=######## rightid=%any rightsendcert=never eap_identity=%any auto=add type=tunnel Everything works fine, IPSec clients get IPs of the 10.0.1.0/24 subnet and can reach the containers subnet. My problem is that I'm not able to get SSH connections over the tunnel. It simply does not work, ssh client does not produce any output. Sniffing with tcpdump gives: tcpdump: 09:50:29.648206 ARP, Request who-has 10.0.0.1 tell mydomain.com, length 28 09:50:29.648246 ARP, Reply 10.0.0.1 is-at 00:ff:aa:00:00:01 (oui Unknown), length 28 09:50:29.648253 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [S], seq 4007849772, win 29200, options [mss 1460,sackOK,TS val 1151153 ecr 0,nop,wscale 7], length 0 09:50:29.648296 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [S.], seq 2809522632, ack 4007849773, win 14480, options [mss 1460,sackOK,TS val 11482992 ecr 1151153,nop,wscale 6], length 0 09:50:29.677225 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [.], ack 2809522633, win 229, options [nop,nop,TS val 1151162 ecr 11482992], length 0 09:50:29.679370 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [P.], seq 0:23, ack 1, win 229, options [nop,nop,TS val 1151162 ecr 11482992], length 23 09:50:29.679403 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [.], ack 24, win 227, options [nop,nop,TS val 11483002 ecr 1151162], length 0 09:50:29.684337 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [P.], seq 1:32, ack 24, win 227, options [nop,nop,TS val 11483003 ecr 1151162], length 31 09:50:29.685471 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [.], seq 32:1480, ack 24, win 227, options [nop,nop,TS val 11483003 ecr 1151162], length 1448 09:50:29.685519 IP mydomain.com > 10.0.0.1: ICMP mydomain.com unreachable - need to frag (mtu 1422), length 556 09:50:29.685567 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [.], seq 32:1402, ack 24, win 227, options [nop,nop,TS val 11483003 ecr 1151162], length 1370 09:50:29.685572 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [.], seq 1402:1480, ack 24, win 227, options [nop,nop,TS val 11483003 ecr 1151162], length 78 09:50:29.714601 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [.], ack 32, win 229, options [nop,nop,TS val 1151173 ecr 11483003], length 0 09:50:29.714642 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [P.], seq 1480:1600, ack 24, win 227, options [nop,nop,TS val 11483012 ecr 1151173], length 120 09:50:29.723649 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [P.], seq 1393:1959, ack 32, win 229, options [nop,nop,TS val 1151174 ecr 11483003], length 566 09:50:29.723677 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [.], ack 24, win 227, options [nop,nop,TS val 11483015 ecr 1151173,nop,nop,sack 1 {1394:1960}], length 0 09:50:29.725688 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [.], ack 1480, win 251, options [nop,nop,TS val 1151177 ecr 11483003], length 0 09:50:29.952394 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [P.], seq 1480:1600, ack 24, win 227, options [nop,nop,TS val 11483084 ecr 1151173,nop,nop,sack 1 {1394:1960}], length 120 09:50:29.981056 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [.], ack 1600, win 251, options [nop,nop,TS val 1151253 ecr 11483084,nop,nop,sack 1 {1480:1600}], length 0 If you need it this is my iptables configuration file: iptables: *filter :INPUT ACCEPT [144:9669] :FORWARD DROP [0:0] :OUTPUT ACCEPT [97:15649] :interfacce-trusted - [0:0] :porte-trusted - [0:0] -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -A FORWARD -j interfacce-trusted -A FORWARD -j porte-trusted -A FORWARD -j REJECT --reject-with icmp-host-unreachable -A FORWARD -d 10.0.0.1/32 -p tcp -m tcp --dport 80 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT -A FORWARD -d 10.0.0.1/32 -p tcp -m tcp --dport 443 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT -A FORWARD -d 10.0.0.3/32 -p tcp -m tcp --dport 1234 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT -A interfacce-trusted -i nat -j ACCEPT -A porte-trusted -d 10.0.0.1/32 -p tcp -m tcp --dport 80 -j ACCEPT -A porte-trusted -d 10.0.0.1/32 -p tcp -m tcp --dport 443 -j ACCEPT -A porte-trusted -d 10.0.0.3/32 -p tcp -m tcp --dport 1234 -j ACCEPT COMMIT *nat :PREROUTING ACCEPT [10:600] :INPUT ACCEPT [10:600] :OUTPUT ACCEPT [4:268] :POSTROUTING ACCEPT [18:1108] -A PREROUTING -d [$EXTIP] -p tcp -m tcp --dport 80 -j DNAT --to-destination 10.0.0.1:80 -A PREROUTING -d [$EXTIP] -p tcp -m tcp --dport 443 -j DNAT --to-destination 10.0.0.1:443 -A PREROUTING -d [$EXTIP] -p tcp -m tcp --dport 8069 -j DNAT --to-destination 10.0.0.3:1234 -A POSTROUTING -s 10.0.0.0/24 -o eth0 -m policy --dir out --pol ipsec -j ACCEPT -A POSTROUTING -s 10.0.1.0/24 -o nat -j MASQUERADE -A POSTROUTING -s 10.0.0.0/24 -o eth0 -j MASQUERADE COMMIT Probably I'm missing something stupid... Thanks in advance for helping :))

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  • How do I configure SSH on OS X?

    - by cwd
    I'm trying to SSH from one Mac running OS X 10.6 to another. Seems to work fine via a password, but I can't get it to use a RSA key instead. Where is the ssh configuration file on OS X and what is the command to reload SSH? Update What I'm asking is how to configured advanced options. For example, on Ubuntu there is a ssh config file at /etc/ssh/sshd_config and if you do something like change the port or disable password authentication for a particular user (PasswordAuthentication no) you need to run /etc/init.d/ssh reload to reload the config. I didn't see that file on OS X, so was just wondering where it was. I am aware of the ~/.ssh ~/.ssh/authorized_keys and `~/.ssh/config

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  • Why does key-based ssh fail even after setting up the authorized_keys file on the remote host?

    - by Brad Grissom
    These details don't matter but I am on a Ubuntu 12.04 machine and I want to ssh into my RaspberryPi without a password. I followed the standard procedure for setting up ssh without a password: local $ ssh-keygen -t rsa (hit enter for defaults to the questions) local $ scp ~/.ssh/id_rsa.pub matt@raspihost:~/.ssh/authorized_keys I logged onto the raspihost and checked all my permissions on ~/.ssh/ and on the authorized_keys file itself. It was still not working!

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  • SSH hangs without password prompt

    - by Wilco
    Just reinstalled OS X and for some reason I now cannot connect to a specific machine on my local network via SSH. I can SSH to other machines on the network without any problems, and other machines can SSH to the problematic one as well. I'm not sure where to start looking for problems - can anyone point me in the right direction? Here's a dump of a connection attempt: OpenSSH_5.1p1, OpenSSL 0.9.7l 28 Sep 2006 debug1: Reading configuration data /etc/ssh_config debug1: Connecting to 10.0.1.7 [10.0.1.7] port 22. debug1: Connection established. debug1: identity file /Users/nwilliams/.ssh/identity type -1 debug1: identity file /Users/nwilliams/.ssh/id_rsa type -1 debug1: identity file /Users/nwilliams/.ssh/id_dsa type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_4.5 debug1: match: OpenSSH_4.5 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.1 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-cbc hmac-md5 none 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 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Host '10.0.1.7' is known and matches the RSA host key. debug1: Found key in /Users/nwilliams/.ssh/known_hosts:1 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password,keyboard-interactive debug1: Next authentication method: gssapi-keyex debug1: No valid Key exchange context debug1: Next authentication method: gssapi-with-mic ... at this point it hangs for quite a while, and then resumes ... debug1: Unspecified GSS failure. Minor code may provide more information Server not found in Kerberos database debug1: Unspecified GSS failure. Minor code may provide more information Server not found in Kerberos database debug1: Unspecified GSS failure. Minor code may provide more information debug1: Next authentication method: publickey debug1: Trying private key: /Users/nwilliams/.ssh/identity debug1: Trying private key: /Users/nwilliams/.ssh/id_rsa debug1: Trying private key: /Users/nwilliams/.ssh/id_dsa debug1: Next authentication method: keyboard-interactive

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  • special case ssh connection lag

    - by Hersheezy
    Setup We have a DMZ and LAN in our office that are connected to the outside with the following setup: +------+ | |------> LAN (normal office router) |Modem | | |------> DMZ (a single machine) +------+ Our internet account is with Comcast and we have 5 status IPs, one of which points to the single machine in the DMZ. Problem ssh connections initiated ANYWHERE EXCEPT the office LAN are really fast. However, from the LAN, there is about a 5 second delay. WTF?? Extra info The DMZ machine is debian 5. Executing a wget to the DMZ has no lag. When executing the following, everything up to HERE IS WHERE THE LAG IS INCURRED executes immediately. ssh -vvvv [email protected] ... debug2: set_newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug3: Wrote 16 bytes for a total of 1015 debug2: set_newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug3: Wrote 48 bytes for a total of 1063 debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /home/shopkins/.ssh/id_rsa (0x22440830) debug2: key: /home/shopkins/.ssh/identity ((nil)) debug2: key: /home/shopkins/.ssh/id_dsa ((nil)) debug3: Wrote 64 bytes for a total of 1127` HERE IS WHERE THE LAG IS INCURRED debug1: Authentications that can continue: publickey,password debug3: start over, passed a different list publickey,password debug3: preferred gssapi-keyex,gssapi-with-mic,gssapi,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: Offering public key: /home/shopkins/.ssh/id_rsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug3: Wrote 368 bytes for a total of 1495 debug1: Authentications that can continue: publickey,password debug1: Trying private key: /home/shopkins/.ssh/identity debug3: no such identity: /home/shopkins/.ssh/identity debug1: Trying private key: /home/shopkins/.ssh/id_dsa debug3: no such identity: /home/shopkins/.ssh/id_dsa debug2: we did not send a packet, disable method debug3: authmethod_lookup password debug3: remaining preferred: ,password debug3: authmethod_is_enabled password debug1: Next authentication method: password [email protected]'s password:

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  • Problem using a public key when connecting to a SSH server running on Cygwin

    - by binary255
    We have installed Cygwin on a Windows Server 2008 Standard server and it working pretty well. Unfortunately we still have a big problem. We want to connect using a public key through SSH which doesn't work. It always falls back to using password login. We have appended our public key to ~/.ssh/authorized_keys on the server and we have our private and public key in ~/.ssh/id_dsa respective ~/.ssh/id_dsa.pub on the client. When debugging the SSH login session we see that the key is offered by the server apparently rejects it by some unknown reason. The SSH output when connecting from an Ubuntu 9.10 desktop with debug information enabled: $ ssh -v 192.168.10.11 OpenSSH_5.1p1 Debian-6ubuntu2, OpenSSL 0.9.8g 19 Oct 2007 debug1: Reading configuration data /home/myuseraccount/.ssh/config debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for debug1: Connecting to 192.168.10.11 [192.168.10.11] port 22. debug1: Connection established. debug1: identity file /home/myuseraccount/.ssh/identity type -1 debug1: identity file /home/myuseraccount/.ssh/id_rsa type -1 debug1: identity file /home/myuseraccount/.ssh/id_dsa type 2 debug1: Checking blacklist file /usr/share/ssh/blacklist.DSA-1024 debug1: Checking blacklist file /etc/ssh/blacklist.DSA-1024 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3 debug1: match: OpenSSH_5.3 pat OpenSSH debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.1p1 Debian-6ubuntu2 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-cbc hmac-md5 none 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 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Host '192.168.10.11' is known and matches the RSA host key. debug1: Found key in /home/myuseraccount/.ssh/known_hosts:12 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,password,keyboard-interactive debug1: Next authentication method: publickey debug1: Offering public key: /home/myuseraccount/.ssh/id_dsa debug1: Authentications that can continue: publickey,password,keyboard-interactive debug1: Trying private key: /home/myuseraccount/.ssh/identity debug1: Trying private key: /home/myuseraccount/.ssh/id_rsa debug1: Next authentication method: keyboard-interactive debug1: Authentications that can continue: publickey,password,keyboard-interactive debug1: Next authentication method: password [email protected]'s password: The version of Cygwin: $ uname -a CYGWIN_NT-6.0 servername 1.7.1(0.218/5/3) 2009-12-07 11:48 i686 Cygwin The installed packages: $ cygcheck -c Cygwin Package Information Package Version Status _update-info-dir 00871-1 OK alternatives 1.3.30c-10 OK arj 3.10.22-1 OK aspell 0.60.5-1 OK aspell-en 6.0.0-1 OK aspell-sv 0.50.2-2 OK autossh 1.4b-1 OK base-cygwin 2.1-1 OK base-files 3.9-3 OK base-passwd 3.1-1 OK bash 3.2.49-23 OK bash-completion 1.1-2 OK bc 1.06-2 OK bzip2 1.0.5-10 OK cabextract 1.1-1 OK compface 1.5.2-1 OK coreutils 7.0-2 OK cron 4.1-59 OK crypt 1.1-1 OK csih 0.9.1-1 OK curl 7.19.6-1 OK cvs 1.12.13-10 OK cvsutils 0.2.5-1 OK cygrunsrv 1.34-1 OK cygutils 1.4.2-1 OK cygwin 1.7.1-1 OK cygwin-doc 1.5-1 OK cygwin-x-doc 1.1.0-1 OK dash 0.5.5.1-2 OK diffutils 2.8.7-2 OK doxygen 1.6.1-2 OK e2fsprogs 1.35-3 OK editrights 1.01-2 OK emacs 23.1-10 OK emacs-X11 23.1-10 OK file 5.04-1 OK findutils 4.5.5-1 OK flip 1.19-1 OK font-adobe-dpi75 1.0.1-1 OK font-alias 1.0.2-1 OK font-encodings 1.0.3-1 OK font-misc-misc 1.1.0-1 OK fontconfig 2.8.0-1 OK gamin 0.1.10-10 OK gawk 3.1.7-1 OK gettext 0.17-11 OK gnome-icon-theme 2.28.0-1 OK grep 2.5.4-2 OK groff 1.19.2-2 OK gvim 7.2.264-1 OK gzip 1.3.12-2 OK hicolor-icon-theme 0.11-1 OK inetutils 1.5-6 OK ipc-utils 1.0-1 OK keychain 2.6.8-1 OK less 429-1 OK libaspell15 0.60.5-1 OK libatk1.0_0 1.28.0-1 OK libaudio2 1.9.2-1 OK libbz2_1 1.0.5-10 OK libcairo2 1.8.8-1 OK libcurl4 7.19.6-1 OK libdb4.2 4.2.52.5-2 OK libdb4.5 4.5.20.2-2 OK libexpat1 2.0.1-1 OK libfam0 0.1.10-10 OK libfontconfig1 2.8.0-1 OK libfontenc1 1.0.5-1 OK libfreetype6 2.3.12-1 OK libgcc1 4.3.4-3 OK libgdbm4 1.8.3-20 OK libgdk_pixbuf2.0_0 2.18.6-1 OK libgif4 4.1.6-10 OK libGL1 7.6.1-1 OK libglib2.0_0 2.22.4-2 OK libglitz1 0.5.6-10 OK libgmp3 4.3.1-3 OK libgtk2.0_0 2.18.6-1 OK libICE6 1.0.6-1 OK libiconv2 1.13.1-1 OK libidn11 1.16-1 OK libintl3 0.14.5-1 OK libintl8 0.17-11 OK libjasper1 1.900.1-1 OK libjbig2 2.0-11 OK libjpeg62 6b-21 OK libjpeg7 7-10 OK liblzma1 4.999.9beta-10 OK libncurses10 5.7-18 OK libncurses8 5.5-10 OK libncurses9 5.7-16 OK libopenldap2_3_0 2.3.43-1 OK libpango1.0_0 1.26.2-1 OK libpcre0 8.00-1 OK libpixman1_0 0.16.6-1 OK libpng12 1.2.35-10 OK libpopt0 1.6.4-4 OK libpq5 8.2.11-1 OK libreadline6 5.2.14-12 OK libreadline7 6.0.3-2 OK libsasl2 2.1.19-3 OK libSM6 1.1.1-1 OK libssh2_1 1.2.2-1 OK libssp0 4.3.4-3 OK libstdc++6 4.3.4-3 OK libtiff5 3.9.2-1 OK libwrap0 7.6-20 OK libX11_6 1.3.3-1 OK libXau6 1.0.5-1 OK libXaw3d7 1.5D-8 OK libXaw7 1.0.7-1 OK libxcb-render-util0 0.3.6-1 OK libxcb-render0 1.5-1 OK libxcb1 1.5-1 OK libXcomposite1 0.4.1-1 OK libXcursor1 1.1.10-1 OK libXdamage1 1.1.2-1 OK libXdmcp6 1.0.3-1 OK libXext6 1.1.1-1 OK libXfixes3 4.0.4-1 OK libXft2 2.1.14-1 OK libXi6 1.3-1 OK libXinerama1 1.1-1 OK libxkbfile1 1.0.6-1 OK libxml2 2.7.6-1 OK libXmu6 1.0.5-1 OK libXmuu1 1.0.5-1 OK libXpm4 3.5.8-1 OK libXrandr2 1.3.0-10 OK libXrender1 0.9.5-1 OK libXt6 1.0.7-1 OK links 1.00pre20-1 OK login 1.10-10 OK luit 1.0.5-1 OK lynx 2.8.5-4 OK man 1.6e-1 OK minires 1.02-1 OK mkfontdir 1.0.5-1 OK mkfontscale 1.0.7-1 OK openssh 5.4p1-1 OK openssl 0.9.8m-1 OK patch 2.5.8-9 OK patchutils 0.3.1-1 OK perl 5.10.1-3 OK rebase 3.0.1-1 OK run 1.1.12-11 OK screen 4.0.3-5 OK sed 4.1.5-2 OK shared-mime-info 0.70-1 OK tar 1.22.90-1 OK terminfo 5.7_20091114-13 OK terminfo0 5.5_20061104-11 OK texinfo 4.13-3 OK tidy 041206-1 OK time 1.7-2 OK tzcode 2009k-1 OK unzip 6.0-10 OK util-linux 2.14.1-1 OK vim 7.2.264-2 OK wget 1.11.4-4 OK which 2.20-2 OK wput 0.6.1-2 OK xauth 1.0.4-1 OK xclipboard 1.1.0-1 OK xcursor-themes 1.0.2-1 OK xemacs 21.4.22-1 OK xemacs-emacs-common 21.4.22-1 OK xemacs-sumo 2007-04-27-1 OK xemacs-tags 21.4.22-1 OK xeyes 1.1.0-1 OK xinit 1.2.1-1 OK xinput 1.5.0-1 OK xkbcomp 1.1.1-1 OK xkeyboard-config 1.8-1 OK xkill 1.0.2-1 OK xmodmap 1.0.4-1 OK xorg-docs 1.5-1 OK xorg-server 1.7.6-2 OK xrdb 1.0.6-1 OK xset 1.1.0-1 OK xterm 255-1 OK xz 4.999.9beta-10 OK zip 3.0-11 OK zlib 1.2.3-10 OK zlib-devel 1.2.3-10 OK zlib0 1.2.3-10 OK The ssh deamon configuration file: $ cat /etc/sshd_config # $OpenBSD: sshd_config,v 1.80 2008/07/02 02:24:18 djm Exp $ # This is the sshd server system-wide configuration file. See # sshd_config(5) for more information. # This sshd was compiled with PATH=/bin:/usr/sbin:/sbin:/usr/bin # The strategy used for options in the default sshd_config shipped with # OpenSSH is to specify options with their default value where # possible, but leave them commented. Uncommented options change a # default value. Port 22 #AddressFamily any #ListenAddress 0.0.0.0 #ListenAddress :: # Disable legacy (protocol version 1) support in the server for new # installations. In future the default will change to require explicit # activation of protocol 1 Protocol 2 # HostKey for protocol version 1 #HostKey /etc/ssh_host_key # HostKeys for protocol version 2 #HostKey /etc/ssh_host_rsa_key #HostKey /etc/ssh_host_dsa_key # Lifetime and size of ephemeral version 1 server key #KeyRegenerationInterval 1h #ServerKeyBits 1024 # Logging # obsoletes QuietMode and FascistLogging #SyslogFacility AUTH #LogLevel INFO # Authentication: #LoginGraceTime 2m #PermitRootLogin yes StrictModes no #MaxAuthTries 6 #MaxSessions 10 RSAAuthentication yes PubkeyAuthentication yes AuthorizedKeysFile .ssh/authorized_keys # For this to work you will also need host keys in /etc/ssh_known_hosts #RhostsRSAAuthentication no # similar for protocol version 2 #HostbasedAuthentication no # Change to yes if you don't trust ~/.ssh/known_hosts for # RhostsRSAAuthentication and HostbasedAuthentication #IgnoreUserKnownHosts no # Don't read the user's ~/.rhosts and ~/.shosts files #IgnoreRhosts yes # To disable tunneled clear text passwords, change to no here! #PasswordAuthentication yes #PermitEmptyPasswords no # Change to no to disable s/key passwords #ChallengeResponseAuthentication yes # Kerberos options #KerberosAuthentication no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes #KerberosGetAFSToken no # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes # Set this to 'yes' to enable PAM authentication, account processing, # and session processing. If this is enabled, PAM authentication will # be allowed through the ChallengeResponseAuthentication and # PasswordAuthentication. Depending on your PAM configuration, # PAM authentication via ChallengeResponseAuthentication may bypass # the setting of "PermitRootLogin without-password". # If you just want the PAM account and session checks to run without # PAM authentication, then enable this but set PasswordAuthentication # and ChallengeResponseAuthentication to 'no'. #UsePAM no AllowAgentForwarding yes AllowTcpForwarding yes GatewayPorts yes X11Forwarding yes X11DisplayOffset 10 X11UseLocalhost no #PrintMotd yes #PrintLastLog yes TCPKeepAlive yes #UseLogin no UsePrivilegeSeparation yes #PermitUserEnvironment no #Compression delayed #ClientAliveInterval 0 #ClientAliveCountMax 3 #UseDNS yes #PidFile /var/run/sshd.pid #MaxStartups 10 #PermitTunnel no #ChrootDirectory none # no default banner path #Banner none # override default of no subsystems Subsystem sftp /usr/sbin/sftp-server # Example of overriding settings on a per-user basis #Match User anoncvs #X11Forwarding yes #AllowTcpForwarding yes #ForceCommand cvs server I hope this information is enough to solve the problem. In case any more is needed please comment and I'll add it. Thank you for reading!

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  • Problem using a public key when connecting to a SSH server running on Cygwin

    - by Deleted
    We have installed Cygwin on a Windows Server 2008 Standard server and it working pretty well. Unfortunately we still have a big problem. We want to connect using a public key through SSH which doesn't work. It always falls back to using password login. We have appended our public key to ~/.ssh/authorized_keys on the server and we have our private and public key in ~/.ssh/id_dsa respective ~/.ssh/id_dsa.pub on the client. When debugging the SSH login session we see that the key is offered by the server apparently rejects it by some unknown reason. The SSH output when connecting from an Ubuntu 9.10 desktop with debug information enabled: $ ssh -v 192.168.10.11 OpenSSH_5.1p1 Debian-6ubuntu2, OpenSSL 0.9.8g 19 Oct 2007 debug1: Reading configuration data /home/myuseraccount/.ssh/config debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for debug1: Connecting to 192.168.10.11 [192.168.10.11] port 22. debug1: Connection established. debug1: identity file /home/myuseraccount/.ssh/identity type -1 debug1: identity file /home/myuseraccount/.ssh/id_rsa type -1 debug1: identity file /home/myuseraccount/.ssh/id_dsa type 2 debug1: Checking blacklist file /usr/share/ssh/blacklist.DSA-1024 debug1: Checking blacklist file /etc/ssh/blacklist.DSA-1024 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3 debug1: match: OpenSSH_5.3 pat OpenSSH debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.1p1 Debian-6ubuntu2 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-cbc hmac-md5 none 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 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Host '192.168.10.11' is known and matches the RSA host key. debug1: Found key in /home/myuseraccount/.ssh/known_hosts:12 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,password,keyboard-interactive debug1: Next authentication method: publickey debug1: Offering public key: /home/myuseraccount/.ssh/id_dsa debug1: Authentications that can continue: publickey,password,keyboard-interactive debug1: Trying private key: /home/myuseraccount/.ssh/identity debug1: Trying private key: /home/myuseraccount/.ssh/id_rsa debug1: Next authentication method: keyboard-interactive debug1: Authentications that can continue: publickey,password,keyboard-interactive debug1: Next authentication method: password [email protected]'s password: The version of Cygwin: $ uname -a CYGWIN_NT-6.0 servername 1.7.1(0.218/5/3) 2009-12-07 11:48 i686 Cygwin The installed packages: $ cygcheck -c Cygwin Package Information Package Version Status _update-info-dir 00871-1 OK alternatives 1.3.30c-10 OK arj 3.10.22-1 OK aspell 0.60.5-1 OK aspell-en 6.0.0-1 OK aspell-sv 0.50.2-2 OK autossh 1.4b-1 OK base-cygwin 2.1-1 OK base-files 3.9-3 OK base-passwd 3.1-1 OK bash 3.2.49-23 OK bash-completion 1.1-2 OK bc 1.06-2 OK bzip2 1.0.5-10 OK cabextract 1.1-1 OK compface 1.5.2-1 OK coreutils 7.0-2 OK cron 4.1-59 OK crypt 1.1-1 OK csih 0.9.1-1 OK curl 7.19.6-1 OK cvs 1.12.13-10 OK cvsutils 0.2.5-1 OK cygrunsrv 1.34-1 OK cygutils 1.4.2-1 OK cygwin 1.7.1-1 OK cygwin-doc 1.5-1 OK cygwin-x-doc 1.1.0-1 OK dash 0.5.5.1-2 OK diffutils 2.8.7-2 OK doxygen 1.6.1-2 OK e2fsprogs 1.35-3 OK editrights 1.01-2 OK emacs 23.1-10 OK emacs-X11 23.1-10 OK file 5.04-1 OK findutils 4.5.5-1 OK flip 1.19-1 OK font-adobe-dpi75 1.0.1-1 OK font-alias 1.0.2-1 OK font-encodings 1.0.3-1 OK font-misc-misc 1.1.0-1 OK fontconfig 2.8.0-1 OK gamin 0.1.10-10 OK gawk 3.1.7-1 OK gettext 0.17-11 OK gnome-icon-theme 2.28.0-1 OK grep 2.5.4-2 OK groff 1.19.2-2 OK gvim 7.2.264-1 OK gzip 1.3.12-2 OK hicolor-icon-theme 0.11-1 OK inetutils 1.5-6 OK ipc-utils 1.0-1 OK keychain 2.6.8-1 OK less 429-1 OK libaspell15 0.60.5-1 OK libatk1.0_0 1.28.0-1 OK libaudio2 1.9.2-1 OK libbz2_1 1.0.5-10 OK libcairo2 1.8.8-1 OK libcurl4 7.19.6-1 OK libdb4.2 4.2.52.5-2 OK libdb4.5 4.5.20.2-2 OK libexpat1 2.0.1-1 OK libfam0 0.1.10-10 OK libfontconfig1 2.8.0-1 OK libfontenc1 1.0.5-1 OK libfreetype6 2.3.12-1 OK libgcc1 4.3.4-3 OK libgdbm4 1.8.3-20 OK libgdk_pixbuf2.0_0 2.18.6-1 OK libgif4 4.1.6-10 OK libGL1 7.6.1-1 OK libglib2.0_0 2.22.4-2 OK libglitz1 0.5.6-10 OK libgmp3 4.3.1-3 OK libgtk2.0_0 2.18.6-1 OK libICE6 1.0.6-1 OK libiconv2 1.13.1-1 OK libidn11 1.16-1 OK libintl3 0.14.5-1 OK libintl8 0.17-11 OK libjasper1 1.900.1-1 OK libjbig2 2.0-11 OK libjpeg62 6b-21 OK libjpeg7 7-10 OK liblzma1 4.999.9beta-10 OK libncurses10 5.7-18 OK libncurses8 5.5-10 OK libncurses9 5.7-16 OK libopenldap2_3_0 2.3.43-1 OK libpango1.0_0 1.26.2-1 OK libpcre0 8.00-1 OK libpixman1_0 0.16.6-1 OK libpng12 1.2.35-10 OK libpopt0 1.6.4-4 OK libpq5 8.2.11-1 OK libreadline6 5.2.14-12 OK libreadline7 6.0.3-2 OK libsasl2 2.1.19-3 OK libSM6 1.1.1-1 OK libssh2_1 1.2.2-1 OK libssp0 4.3.4-3 OK libstdc++6 4.3.4-3 OK libtiff5 3.9.2-1 OK libwrap0 7.6-20 OK libX11_6 1.3.3-1 OK libXau6 1.0.5-1 OK libXaw3d7 1.5D-8 OK libXaw7 1.0.7-1 OK libxcb-render-util0 0.3.6-1 OK libxcb-render0 1.5-1 OK libxcb1 1.5-1 OK libXcomposite1 0.4.1-1 OK libXcursor1 1.1.10-1 OK libXdamage1 1.1.2-1 OK libXdmcp6 1.0.3-1 OK libXext6 1.1.1-1 OK libXfixes3 4.0.4-1 OK libXft2 2.1.14-1 OK libXi6 1.3-1 OK libXinerama1 1.1-1 OK libxkbfile1 1.0.6-1 OK libxml2 2.7.6-1 OK libXmu6 1.0.5-1 OK libXmuu1 1.0.5-1 OK libXpm4 3.5.8-1 OK libXrandr2 1.3.0-10 OK libXrender1 0.9.5-1 OK libXt6 1.0.7-1 OK links 1.00pre20-1 OK login 1.10-10 OK luit 1.0.5-1 OK lynx 2.8.5-4 OK man 1.6e-1 OK minires 1.02-1 OK mkfontdir 1.0.5-1 OK mkfontscale 1.0.7-1 OK openssh 5.4p1-1 OK openssl 0.9.8m-1 OK patch 2.5.8-9 OK patchutils 0.3.1-1 OK perl 5.10.1-3 OK rebase 3.0.1-1 OK run 1.1.12-11 OK screen 4.0.3-5 OK sed 4.1.5-2 OK shared-mime-info 0.70-1 OK tar 1.22.90-1 OK terminfo 5.7_20091114-13 OK terminfo0 5.5_20061104-11 OK texinfo 4.13-3 OK tidy 041206-1 OK time 1.7-2 OK tzcode 2009k-1 OK unzip 6.0-10 OK util-linux 2.14.1-1 OK vim 7.2.264-2 OK wget 1.11.4-4 OK which 2.20-2 OK wput 0.6.1-2 OK xauth 1.0.4-1 OK xclipboard 1.1.0-1 OK xcursor-themes 1.0.2-1 OK xemacs 21.4.22-1 OK xemacs-emacs-common 21.4.22-1 OK xemacs-sumo 2007-04-27-1 OK xemacs-tags 21.4.22-1 OK xeyes 1.1.0-1 OK xinit 1.2.1-1 OK xinput 1.5.0-1 OK xkbcomp 1.1.1-1 OK xkeyboard-config 1.8-1 OK xkill 1.0.2-1 OK xmodmap 1.0.4-1 OK xorg-docs 1.5-1 OK xorg-server 1.7.6-2 OK xrdb 1.0.6-1 OK xset 1.1.0-1 OK xterm 255-1 OK xz 4.999.9beta-10 OK zip 3.0-11 OK zlib 1.2.3-10 OK zlib-devel 1.2.3-10 OK zlib0 1.2.3-10 OK The ssh deamon configuration file: $ cat /etc/sshd_config # $OpenBSD: sshd_config,v 1.80 2008/07/02 02:24:18 djm Exp $ # This is the sshd server system-wide configuration file. See # sshd_config(5) for more information. # This sshd was compiled with PATH=/bin:/usr/sbin:/sbin:/usr/bin # The strategy used for options in the default sshd_config shipped with # OpenSSH is to specify options with their default value where # possible, but leave them commented. Uncommented options change a # default value. Port 22 #AddressFamily any #ListenAddress 0.0.0.0 #ListenAddress :: # Disable legacy (protocol version 1) support in the server for new # installations. In future the default will change to require explicit # activation of protocol 1 Protocol 2 # HostKey for protocol version 1 #HostKey /etc/ssh_host_key # HostKeys for protocol version 2 #HostKey /etc/ssh_host_rsa_key #HostKey /etc/ssh_host_dsa_key # Lifetime and size of ephemeral version 1 server key #KeyRegenerationInterval 1h #ServerKeyBits 1024 # Logging # obsoletes QuietMode and FascistLogging #SyslogFacility AUTH #LogLevel INFO # Authentication: #LoginGraceTime 2m #PermitRootLogin yes StrictModes no #MaxAuthTries 6 #MaxSessions 10 RSAAuthentication yes PubkeyAuthentication yes AuthorizedKeysFile .ssh/authorized_keys # For this to work you will also need host keys in /etc/ssh_known_hosts #RhostsRSAAuthentication no # similar for protocol version 2 #HostbasedAuthentication no # Change to yes if you don't trust ~/.ssh/known_hosts for # RhostsRSAAuthentication and HostbasedAuthentication #IgnoreUserKnownHosts no # Don't read the user's ~/.rhosts and ~/.shosts files #IgnoreRhosts yes # To disable tunneled clear text passwords, change to no here! #PasswordAuthentication yes #PermitEmptyPasswords no # Change to no to disable s/key passwords #ChallengeResponseAuthentication yes # Kerberos options #KerberosAuthentication no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes #KerberosGetAFSToken no # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes # Set this to 'yes' to enable PAM authentication, account processing, # and session processing. If this is enabled, PAM authentication will # be allowed through the ChallengeResponseAuthentication and # PasswordAuthentication. Depending on your PAM configuration, # PAM authentication via ChallengeResponseAuthentication may bypass # the setting of "PermitRootLogin without-password". # If you just want the PAM account and session checks to run without # PAM authentication, then enable this but set PasswordAuthentication # and ChallengeResponseAuthentication to 'no'. #UsePAM no AllowAgentForwarding yes AllowTcpForwarding yes GatewayPorts yes X11Forwarding yes X11DisplayOffset 10 X11UseLocalhost no #PrintMotd yes #PrintLastLog yes TCPKeepAlive yes #UseLogin no UsePrivilegeSeparation yes #PermitUserEnvironment no #Compression delayed #ClientAliveInterval 0 #ClientAliveCountMax 3 #UseDNS yes #PidFile /var/run/sshd.pid #MaxStartups 10 #PermitTunnel no #ChrootDirectory none # no default banner path #Banner none # override default of no subsystems Subsystem sftp /usr/sbin/sftp-server # Example of overriding settings on a per-user basis #Match User anoncvs #X11Forwarding yes #AllowTcpForwarding yes #ForceCommand cvs server I hope this information is enough to solve the problem. In case any more is needed please comment and I'll add it. Thank you for reading!

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  • Restrict SSH user to connection from one machine

    - by Jonathan
    During set-up of a home server (running Kubuntu 10.04), I created an admin user for performing administrative tasks that may require an unmounted home. This user has a home directory on the root partition of the box. The machine has an internet-facing SSH server, and I have restricted the set of users that can connect via SSH, but I would like to restrict it further by making admin only accessible from my laptop (or perhaps only from the local 192.168.1.0/24 range). I currently have only an AllowGroups ssh-users with myself and admin as members of the ssh-users group. What I want is something that works like you may expect this setup to work (but it doesn't): $ groups jonathan ... ssh-users $ groups admin ... ssh-restricted-users $ cat /etc/ssh/sshd_config ... AllowGroups ssh-users [email protected].* ... Is there a way to do this? I have also tried this, but it did not work (admin could still log in remotely): AllowUsers [email protected].* * AllowGroups ssh-users with admin a member of ssh-users. I would also be fine with only allowing admin to log in with a key, and disallowing password logins, but I could find no general setting for sshd; there is a setting that requires root logins to use a key, but not for general users.

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  • Restrict SSH user to connection from one machine

    - by Jonathan
    During set-up of a home server (running Kubuntu 10.04), I created an admin user for performing administrative tasks that may require an unmounted home. This user has a home directory on the root partition of the box. The machine has an internet-facing SSH server, and I have restricted the set of users that can connect via SSH, but I would like to restrict it further by making admin only accessible from my laptop (or perhaps only from the local 192.168.1.0/24 range). I currently have only an AllowGroups ssh-users with myself and admin as members of the ssh-users group. What I want is something that works like you may expect this setup to work (but it doesn't): $ groups jonathan ... ssh-users $ groups admin ... ssh-restricted-users $ cat /etc/ssh/sshd_config ... AllowGroups ssh-users [email protected].* ... Is there a way to do this? I have also tried this, but it did not work (admin could still log in remotely): AllowUsers [email protected].* * AllowGroups ssh-users with admin a member of ssh-users. I would also be fine with only allowing admin to log in with a key, and disallowing password logins, but I could find no general setting for sshd; there is a setting that requires root logins to use a key, but not for general users.

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  • Server-side SSH jump hosts

    - by Dan Sosedoff
    Trying to figure out server side SSH jump hosts logic. Current network schema: [Client] <--> [Server A: hostname: a.com] <--> [Server B] [Client] <--> [Server A: hostname: b.com] <--> [Server C] Server A responds to both DNS records. Possible flow: Client opens a ssh connection with ssh [email protected]. Server A accepts it and should automatically jump user onto Server B with ssh user2@server_b.com. Client opens a ssh connection with ssh [email protected]. Server A accepts it and should automatically just user onto Server C with ssh user2@server_c.com. In other words, client should be able to connect to the target without performing any local configuration, assuming that we have a stock ssh config. The problem with ssh jumps is that user has to define hosts in local ~/.ssh/config file, which is not acceptable in my case. It needs to be a default sshd behavior. Im aware that you can define a custom command ~/.ssh/authorized_keys on server, but i dont think there is a way to properly detect source hostname where user tries to connect. It is possible at all ?

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  • Can't ssh from CentOS 6.5 to SUSE LINUX 10.1

    - by Pavel Tankov
    We have a quite old installation of SUSE LINUX 10.1 (i586) in the office. The problem shortly: I can successfully ssh to it from machines in the same LAN (192.168.1.0) and not from others (that are in 10.23.0.0). The SuSE has SSH server openssh-4.2p1-18.12. I have ruled out the firewall and hosts.allow and hosts.deny files. When my ssh login attempt fails, here is what the logs say: on the client: $ ssh -vvv 192.168.1.5 OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to 192.168.1.5 [192.168.1.5] port 22. debug1: Connection established. debug1: identity file /home/nbuild/.ssh/identity type -1 debug1: identity file /home/nbuild/.ssh/identity-cert type -1 debug1: identity file /home/nbuild/.ssh/id_rsa type -1 debug1: identity file /home/nbuild/.ssh/id_rsa-cert type -1 debug1: identity file /home/nbuild/.ssh/id_dsa type -1 debug1: identity file /home/nbuild/.ssh/id_dsa-cert type -1 on the server: Aug 21 16:34:25 serverhost sshd[20736]: debug3: fd 4 is not O_NONBLOCK Aug 21 16:34:25 serverhost sshd[20736]: debug1: Forked child 20739. Aug 21 16:34:25 serverhost sshd[20736]: debug3: send_rexec_state: entering fd = 7 config len 403 Aug 21 16:34:25 serverhost sshd[20736]: debug3: ssh_msg_send: type 0 Aug 21 16:34:25 serverhost sshd[20736]: debug3: send_rexec_state: done Aug 21 16:34:25 serverhost sshd[20739]: debug1: rexec start in 4 out 4 newsock 4 pipe 6 sock 7 Aug 21 16:34:25 serverhost sshd[20739]: debug1: inetd sockets after dupping: 3, 3 Aug 21 16:34:25 serverhost sshd[20739]: debug3: Normalising mapped IPv4 in IPv6 address Aug 21 16:34:25 serverhost sshd[20739]: Connection from 10.23.1.11 port 44340 The above log on the server is when I enable DEBUG3 log level. However, with the default log level (INFO), the only thing the server logs is this: Aug 21 16:38:32 serverhost sshd[20749]: Did not receive identification string from 10.23.1.11 Any hints? I feel I've tried everything already.

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  • VIM does not detect syntax of .ssh/config

    - by Erik
    On a plain Ubuntu installation (12.04 in my case) when I have no ~/.vimrc VIM does not detect syntax of .ssh/config. Syntax highlighting works, but it does not set the correct filetype. vi ~/.ssh/config :set syn? >syntax=conf When I do: set syn=sshconfig Then the syntax highlighting is as it should be. Why isn't the filetype automatically identified? And how can it be set automatically?

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  • vi issue in SSH TTYs to Ubuntu 14.04.1 LTS

    - by Steve Campbell
    After upgrading my server to Ubuntu 14.04.1 LTS, I can no longer use the vi editor to edit anything in an SSH terminal (I access the server by launching ssh sessions from Cygwin running on Windows). The empty portions of the vi window fill with garbage. The workaround is to launch an xterm from the server back to my Cygwin/X display. Using vi from within the xterm works fine. Setting my TERM to vt100/vt220/xterm does not help.

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  • Startup a Ubuntu FTP and SSH server without logging in

    - by Jenko
    I have a Ubuntu Server 11.10 box, which I would like to run "headless", and without a keyboard, mouse or display. Is it possible that immediately after startup the machine logs into an account, or allows me to control the machine from my Windows 7 machine nearby via SSH and SFTP? I've got OpenSSH server installed, and even when the box is not logged in I can start an SSH session. I've tried installing VSFTPD but its very troublesome (hardly connects) and only starts when I login locally into the box.

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  • ssh -X "Xt error: Can't open display: :0.0"

    - by Fabian
    I'm trying to open xterm on my remote server (Ubuntu Server 10.04) with ssh: ssh -X name@machine xterm but the error returned is: xterm Xt error: Can't open display: :0.0` I googled and tried everything I found. Still getting this error. The DISPLAY-variable should be set automatically, right? Part of sshd_config: X11Forwarding yes X11DisplayOffset 10 PrintMotd no PrintLastLog yes TCPKeepAlive yes Any advice?

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  • OSX 10.6.6 SSH md5 break-in check

    - by Alex
    Information Recently one of the linux servers that I access was compromised to steal passwords and ssh keys using a modified ssh binary. This lead me to question if the attacker had compromised my OSX Laptop which had ssh access turned on. A sophos virus scan turned up nothing, and I did not have rkhunter installed before the attack, so I could not compare hashes of the system binaries to be sure. However because OSX is relatively standard for each of their major releases, I asked fiends for md5 hashes md5 /usr/bin/ssh and md5 /usr/sbin/sshd as a basic first check to see if there was anything different about my machine. A few emails later I have found the following data: Version (Arch) [N] MD5 (/usr/bin/ssh) MD5 (/usr/sbin/sshd) OSX 10.5.8 (PPC) [3] 1e9fd483eef23464ec61c815f7984d61 9d32a36294565368728c18de466e69f1 OSX 10.5.8 (intel) [5] 1e9fd483eef23464ec61c815f7984d61 9d32a36294565368728c18de466e69f1 OSX 10.6.x (intel) [7] 591fbe723011c17b6ce41c537353b059 e781fad4fc86cf652f6df22106e0bf0e OSX 10.6.x (intel) [4] 58be068ad5e575c303ec348a1c71d48b 33dafd419194b04a558c8404b484f650 Mine 10.6.6 (intel) df344cc00a294c91230c65e8b7332a79 b5094ccf4cd074aaf573d4f5df75906a where N is the number of machines with with that MD5, and the last row is my laptop. The sample is relatively heterogeneous spaning a few years of different makes and models of Apples, and different versions of 10.6.x. The different hash for my system made me worried that these binaries might have been compromised. So I made sure that my backup for the week was good, and dived into formatting my system and reinstalling OSX. After reinstalling OSX from the manufacturer DVD, I found that the MD5 hash did not change for either ssh, or sshd. Goal Make sure that my system is does not have any malicious software. Should I be worried that this base install of OSX (with no other software installed) has been compromised? I have also updated my system to 10.6.6 and found no change as well. Other Information I am not sure if this is helpful information, but my laptop is a i7 15 inch MacBook Pro bought in Nov 2010, and here is some output from system_profiler: System Software Overview: System Version: Mac OS X 10.6.6 (10J567) Kernel Version: Darwin 10.6.0 64-bit Kernel and Extensions: No Time since boot: 1:37 Hardware: Hardware Overview: Model Name: MacBook Model Identifier: MacBook6,2 Processor Name: Intel Core i7 Processor Speed: 2.66 GHz Number Of Processors: 1 Total Number Of Cores: 2 L2 Cache (per core): 256 KB L3 Cache: 4 MB Memory: 4 GB Processor Interconnect Speed: 4.8 GT/s Boot ROM Version: MBP61.0057.B0C SMC Version (system): 1.58f16 Sudden Motion Sensor: State: Enabled On the laptop, I find: $ codesign -vvv /usr/bin/ssh /usr/bin/ssh: valid on disk /usr/bin/ssh: satisfies its Designated Requirement $ codesign -vvv /usr/sbin/sshd /usr/sbin/sshd: valid on disk /usr/sbin/sshd: satisfies its Designated Requirement $ ls -la /usr/bin/ssh -rwxr-xr-x 1 root wheel 1001520 Feb 11 2010 /usr/bin/ssh $ ls -la /usr/sbin/sshd -rwxr-xr-x 1 root wheel 1304800 Feb 11 2010 /usr/sbin/sshd $ ls -la /sbin/md5 -r-xr-xr-x 1 root wheel 65232 May 18 2009 /sbin/md5 Update So far I have not gotten an answer about this question, but if you could help by increasing the number of hashes that I can compare against, that would be great. To get hashes, and version numbers, run the following on osx: md5 /usr/bin/ssh md5 /usr/sbin/sshd ssh -V sw_vers

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  • How to set public SSH key for root user on server?

    - by amrnt
    I'm trying to follow Slicehost Document to setup my server. I reached SSH section. I made it as written, but when i logged out from root, i cant access root@IP_ADDRESS -p 30000 again! but i can access user@IP_ADDRESS -p 30000. So, the question is, how to set a public SSH key for root user? Thanks in advance!

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  • SSH to an ubuntu machine using avahi

    - by tensaiji
    I have an ubuntu box that I connect to using avahi. Connecting to that box works fine for all services (I regularly use AFP, SSH and SMB on it) but I've noticed that whenever I connect to it from a mac using SSH (and using the ".local" dns name provided by avahi - eg. "ssh .local") SSH tries to connect using ipv6, which for some reason times out (after two minutes) then it tries ipv4 which connects immediately. I'd like to avoid this timeout, as it's really annoying for me and other users - if SSH tried ipv4 first or if ssh over ipv6 worked then that would solve the problem. But so far I've been unable to get either to work (the best I've managed is to specify the "-4" option to SSH to stop it from trying ipv6 at all). I'm using Ubuntu 10.04. Any solution has to be on the server (not the client) as there are multiple clients connecting. A possible complication might be that my LAN is set up to allow link-local ipv6 addresses only, but I have other servers (using Mac OS) that I can SSH into using ipv6) I suspect that the problem could be solved by either preventing avahi from broadcasting the ipv6 address, or by enabling ssh over ipv6, but so far as I can tell avahi is already configured not to broadcast the ipv6 address and sshd is configured to allow ipv6 connections! Here's my /etc/avahi/avahi-daemon.conf (I don't think I've changed anything from the ubuntu defaults) [server] #host-name=foo #domain-name=local #browse-domains=0pointer.de, zeroconf.org use-ipv4=yes use-ipv6=no #allow-interfaces=eth0 #deny-interfaces=eth1 #check-response-ttl=no #use-iff-running=no #enable-dbus=yes #disallow-other-stacks=no #allow-point-to-point=no [wide-area] enable-wide-area=yes [publish] #disable-publishing=no #disable-user-service-publishing=no #add-service-cookie=no #publish-addresses=yes #publish-hinfo=yes #publish-workstation=yes #publish-domain=yes #publish-dns-servers=192.168.50.1, 192.168.50.2 #publish-resolv-conf-dns-servers=yes #publish-aaaa-on-ipv4=yes #publish-a-on-ipv6=no [reflector] #enable-reflector=no #reflect-ipv=no [rlimits] #rlimit-as= rlimit-core=0 rlimit-data=4194304 rlimit-fsize=0 rlimit-nofile=300 rlimit-stack=4194304 rlimit-nproc=3 and here's my sshd_config (mainly updated to only allow pub/private keys): # What ports, IPs and protocols we listen for Port 22 # Use these options to restrict which interfaces/protocols sshd will bind to #ListenAddress :: #ListenAddress 0.0.0.0 Protocol 2 # HostKeys for protocol version 2 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_dsa_key #Privilege Separation is turned on for security UsePrivilegeSeparation yes # Lifetime and size of ephemeral version 1 server key KeyRegenerationInterval 3600 ServerKeyBits 768 # Logging SyslogFacility AUTH LogLevel INFO # Authentication: LoginGraceTime 180 PermitRootLogin no StrictModes yes RSAAuthentication yes PubkeyAuthentication yes #AuthorizedKeysFile %h/.ssh/authorized_keys # Don't read the user's ~/.rhosts and ~/.shosts files IgnoreRhosts yes # For this to work you will also need host keys in /etc/ssh_known_hosts RhostsRSAAuthentication no # similar for protocol version 2 HostbasedAuthentication no # Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication #IgnoreUserKnownHosts yes # To enable empty passwords, change to yes (NOT RECOMMENDED) PermitEmptyPasswords no # Change to yes to enable challenge-response passwords (beware issues with # some PAM modules and threads) ChallengeResponseAuthentication no # Change to no to disable tunnelled clear text passwords PasswordAuthentication no AllowGroups sshusers # Kerberos options #KerberosAuthentication no #KerberosGetAFSToken no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes X11Forwarding yes X11DisplayOffset 10 PrintMotd no PrintLastLog yes TCPKeepAlive yes #UseLogin no MaxStartups 10:30:60 #Banner /etc/issue.net # Allow client to pass locale environment variables AcceptEnv LANG LC_* Subsystem sftp /usr/lib/openssh/sftp-server UsePAM yes Does anyone have any ideas that I can try, or has experienced anything similar?

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  • SSH with authorized_keys to an Ubuntu system with encrypted homedir?

    - by Josh
    I recently set up a new server with Ubuntu karmic 9.10, and when I created my home directory I chose to make it encrypted. Now, after loading my authorized_keys file into ~/.ssh, it isn't recognized because my home directory isn't decrypted until after I log in. Is there a way to make SSH keys work with encrypted home directories under Ubuntu?

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