Bug #7012
closed
scponly shipped with pfSense does not work with Linux scp
100%
Description
Dunno guys how you compiled this, but scp does not work. Never worked in fact, as discussed at https://forum.pfsense.org/index.php?topic=73150.0
SFTP works without any problems. Tested with Debian stable and Ubuntu 16 LTS. Looking at pkg info scponly, I can see:
Options :
CHROOT : off
DEFAULT_CHDIR : off
DOCS : off
GFTP : off
RSYNC : off
SCP : off
SVN : off
SVNSERVE : off
UNISON : off
WILDCARDS : on
WINSCP : off
I'd personally blame SCP: off for the breakage. And on that note, not disabling WINSCP compatibility would be nice as well.
Updated by Kill Bill over 7 years ago
Session output with SCP (broken):
# scp -v -P 22 backup@gw.example.com:/cf/conf/config.xml "/backups/pfsense/config.xml" Executing: program /usr/bin/ssh host gw.example.com, user backup, command scp -v -f /cf/conf/config.xml OpenSSH_7.2p2 Ubuntu-4ubuntu2.1, OpenSSL 1.0.2g 1 Mar 2016 debug1: Reading configuration data /root/.ssh/config debug1: /root/.ssh/config line 1: Applying options for gw.example.com debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug1: Connecting to gw.example.com [2001:470:dead:beef::1] port 22. debug1: Connection established. debug1: permanently_set_uid: 0/0 debug1: identity file /root/.ssh/backup_id_ed25519 type 4 debug1: key_load_public: No such file or directory debug1: identity file /root/.ssh/backup_id_ed25519-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.1 debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2 debug1: match: OpenSSH_7.2 pat OpenSSH* compat 0x04000000 debug1: Authenticating to gw.example.com:22 as 'backup' debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: algorithm: curve25519-sha256@libssh.org debug1: kex: host key algorithm: ssh-ed25519 debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ssh-ed25519 SHA256:FcnE5g89BZu3tCaUqaANXNNF7L2d12qbEvXbbH8W31o debug1: Host 'gw.example.com' is known and matches the ED25519 host key. debug1: Found key in /root/.ssh/known_hosts:1 debug1: rekey after 134217728 blocks debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: rekey after 134217728 blocks debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_EXT_INFO received debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512> debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey debug1: Next authentication method: publickey debug1: Offering ED25519 public key: /root/.ssh/backup_id_ed25519 debug1: Server accepts key: pkalg ssh-ed25519 blen 51 debug1: Authentication succeeded (publickey). Authenticated to gw.example.com ([2001:470:dead:beef::1]:22). debug1: channel 0: new [client-session] debug1: Requesting no-more-sessions@openssh.com debug1: Entering interactive session. debug1: pledge: network debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0 debug1: Sending environment. debug1: Sending env LANG = en_GB.UTF-8 debug1: Sending command: scp -v -f /cf/conf/config.xml debug1: client_input_channel_req: channel 0 rtype exit-status reply 0 debug1: client_input_channel_req: channel 0 rtype eow@openssh.com reply 0 debug1: channel 0: free: client-session, nchannels 1 debug1: fd 0 clearing O_NONBLOCK debug1: fd 1 clearing O_NONBLOCK Transferred: sent 2092, received 1796 bytes, in 0.1 seconds Bytes per second: sent 32182.7, received 27629.1 debug1: Exit status 1
Session output with SFTP (working)
# sftp -v -P 22 backup@gw.example.com:/cf/conf/config.xml "/backups/pfsense/config.xml" OpenSSH_7.2p2 Ubuntu-4ubuntu2.1, OpenSSL 1.0.2g 1 Mar 2016 debug1: Reading configuration data /root/.ssh/config debug1: /root/.ssh/config line 1: Applying options for gw.example.com debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug1: Connecting to gw.example.com [2001:470:6f:dead:beef::1] port 22. debug1: Connection established. debug1: permanently_set_uid: 0/0 debug1: identity file /root/.ssh/backup_id_ed25519 type 4 debug1: key_load_public: No such file or directory debug1: identity file /root/.ssh/backup_id_ed25519-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.1 debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2 debug1: match: OpenSSH_7.2 pat OpenSSH* compat 0x04000000 debug1: Authenticating to gw.example.com:22 as 'backup' debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: algorithm: curve25519-sha256@libssh.org debug1: kex: host key algorithm: ssh-ed25519 debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ssh-ed25519 SHA256:FcnE5g89BZu3tCaUqaANXNNF7L2d12qbEvXbbH8W31o debug1: Host 'gw.example.com' is known and matches the ED25519 host key. debug1: Found key in /root/.ssh/known_hosts:1 debug1: rekey after 134217728 blocks debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: rekey after 134217728 blocks debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_EXT_INFO received debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512> debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey debug1: Next authentication method: publickey debug1: Offering ED25519 public key: /root/.ssh/backup_id_ed25519 debug1: Server accepts key: pkalg ssh-ed25519 blen 51 debug1: Authentication succeeded (publickey). Authenticated to gw.example.com ([2001:470:6f:dead:beef::1]:22). debug1: channel 0: new [client-session] debug1: Requesting no-more-sessions@openssh.com debug1: Entering interactive session. debug1: pledge: network debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0 debug1: Sending environment. debug1: Sending env LANG = en_GB.UTF-8 debug1: Sending subsystem: sftp Connected to gw.example.com. Fetching /cf/conf/config.xml to /root/backups/pfsense/config.xml /cf/conf/config.xml 100% 1614KB 1.6MB/s 00:00 debug1: client_input_channel_req: channel 0 rtype exit-status reply 0 debug1: channel 0: free: client-session, nchannels 1 debug1: fd 0 clearing O_NONBLOCK Transferred: sent 4708, received 1659188 bytes, in 0.3 seconds Bytes per second: sent 15345.5, received 5408029.5 debug1: Exit status 0
Updated by Jim Pingle over 7 years ago
- Status changed from New to Feedback
- % Done changed from 0 to 100
Applied in changeset ef76f693c54b01b40666a41dbf82be70f9379718.
Updated by Jim Pingle over 7 years ago
- Assignee set to Jim Pingle
I pushed a change to fix the options up so it'll come through with the next update. pkg is smart enough to pick up that the options changed and it needs a nudge on the client side. I enabled CHROOT SCP WILDCARDS and WINSCP
I would have enabled RSYNC but that made it pull in rsync as an extra dependency which would have added to the base system size.
Updated by Kill Bill over 7 years ago
Yeah, thanks. I'll test in a while. (As for the chroot, that's going to need some pfSense code changes - adding a separate priv, setting the user shell to /usr/local/bin/scponlyc; plus not sure if you still also need the minimal chroot structure under $HOME (there used to be some example setup_chroot.sh script shipped with docs, it's been a while since I touched this thing).
Updated by Jim Pingle over 7 years ago
Yeah it would need some extra bits but that can all be done by hand if the user really wants it, it doesn't hurt to have the option enabled for now. The script to setup the chroot is still shipped with the package.
Updated by Kill Bill over 7 years ago
Agree. I might do a PR eventually when I get bored.
(All this also could be done with OpenSSH "natively", but it seems way more convoluted [1] -- plus there's the syslogd chrooted socket issue, not sure whether there's code for this already in pfSense, but the whole thing sounds like a royal PITA.)
Updated by Kill Bill over 7 years ago
Jim Pingle wrote:
I pushed a change to fix the options up so it'll come through with the next update. pkg is smart enough to pick up that the options changed and it needs a nudge on the client side. I enabled CHROOT SCP WILDCARDS and WINSCP
Works! 8-)
Updated by Kill Bill over 7 years ago
Jim Pingle wrote:
Yeah it would need some extra bits but that can all be done by hand if the user really wants it, it doesn't hurt to have the option enabled for now. The script to setup the chroot is still shipped with the package.
Made a PR for the chroot priv: https://github.com/pfsense/pfsense/pull/3283 (sans the chroot setup, however this shouldn't be much of a problem with /usr/local/etc/rc.d/scponlyc if people need it.)
Updated by Jim Pingle about 7 years ago
- Target version changed from 2.4.0 to 2.3.3