I have a setup as per the attached diagram (note:IPs have been changed for security purposes).
The two servers are running RedHat Linux and Server 2 is set to synchronize with Server 1 using rsync. However rsync fails to transfer the files. Rsync uses SSH, which connect and authenticates well, but after that it just stops.
I have tried using sftp and scp between the two sites but they stop as well.
Using just ssh, I am able to connect between the two sites, but listing a long directory on lists the first few lines. Then I would have to reset the connection.
Below is a session I tried using scp with debug on.
I don't want to put anyone off-track, but I suspect that the "switch" on the ASA5505 is blocking rsync and other similar traffic. Could this be the case?
linux-h4ti:~ # scp -v -C email@example.com:/boot/vmlinuz .
Executing: program /usr/bin/ssh host 192.168.15.2, user root, command scp -v -f /boot/vmlinuz
OpenSSH_5.0p1, OpenSSL 0.9.8g 19 Oct 2007
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to 192.168.15.2 [192.168.15.2] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /root/.ssh/id_rsa type -1
debug1: identity file /root/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.0
debug1: match: OpenSSH_5.0 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.0
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 firstname.lastname@example.org
debug1: kex: client->server aes128-cbc hmac-md5 email@example.com
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 '192.168.15.2' is known and matches the RSA host key.
debug1: Found key in /root/.ssh/known_hosts:3
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,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Trying private key: /root/.ssh/id_rsa
debug1: Trying private key: /root/.ssh/id_dsa
debug1: Next authentication method: keyboard-interactive
debug1: Enabling compression at level 6.
debug1: Authentication succeeded (keyboard-interactive).
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
debug1: Sending environment.
debug1: Sending env LANG = POSIX
debug1: Sending env LC_CTYPE = en_US.UTF-8
debug1: Sending command: scp -v -f /boot/vmlinuz
Sending file modes: C0644 2106968 vmlinuz
Sink: C0644 2106968 vmlinuz
vmlinuz 0% 0 0.0KB/s - stalled -^C
debug1: channel 0: free: client-session, nchannels 1
debug1: fd 0 clearing O_NONBLOCK
debug1: fd 1 clearing O_NONBLOCK
Killed by signal 2.