Hi Matt,

Make sure you have /etc/ssh2/ssh2_config set to zero (0) in RekeyIntervalSeconds. Your 
output mentions this:
> debug: Ssh2Transport/trcommon.c:789/ssh_tr_input_version: Remote version has 
> rekey incompatibility bug.

-Anne

On Mon, Jan 15, 2001 at 09:49:40AM -0700, Matt Beland wrote:
> There seems to be an odd bug in SSH 2.4.0. When connecting to certain hosts 
> (shell.sourceforge.net is one prominent example) the connection always fails 
> with the error 
> 
> Disconnected; MAC error (Message authentication check fails.).
> 
> This happens before the password prompt is displayed. Another machine running 
> 2.3.0 connects fine.
> 
> Here's the relevent portion of the -v output:
> 
> debug: ssh_client_wrap: creating transport protocol
> debug: 
> SshAuthMethodClient/sshauthmethodc.c:117/ssh_client_authentication_initia
> lize: Added "publickey" to usable methods.
> debug: 
> SshAuthMethodClient/sshauthmethodc.c:117/ssh_client_authentication_initia
> lize: Added "password" to usable methods.
> debug: Ssh2Client/sshclient.c:1142/ssh_client_wrap: creating userauth protocol
> debug: Ssh2Common/sshcommon.c:502/ssh_common_wrap: local ip = 10.100.151.21, 
> loc
> al port = 3061
> debug: Ssh2Common/sshcommon.c:504/ssh_common_wrap: remote ip = 
> 216.136.171.201,
> remote port = 22
> debug: SshConnection/sshconn.c:1866/ssh_conn_wrap: Wrapping...
> debug: Ssh2Transport/trcommon.c:599/ssh_tr_input_version: Remote version: 
> SSH-1.99-OpenSSH_2.2.0p1
> debug: Ssh2Transport/trcommon.c:789/ssh_tr_input_version: Remote version has 
> rek
> ey incompatibility bug.
> debug: Ssh2Transport/trcommon.c:1120/ssh_tr_negotiate: c_to_s: cipher 
> 3des-cbc,
> mac hmac-sha1, compression none
> debug: Ssh2Transport/trcommon.c:1123/ssh_tr_negotiate: s_to_c: cipher 
> 3des-cbc,
> mac hmac-sha1, compression none
> debug: Ssh2Client/sshclient.c:406/keycheck_key_match: Host key found from 
> databa
> se.
> debug: Ssh2Common/sshcommon.c:137/ssh_common_disconnect: DISCONNECT received: 
> Me
> ssage authentication check fails.
> warning: Authentication failed.
> debug: Ssh2/ssh2.c:85/client_disconnect: locally_generated = TRUE
> Disconnected; MAC error (Message authentication check fails.).
> debug: uninitializing event loop
> 
> 
> Anyone else seeing something like this?
> 
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Anne Carasik                      | The 4th Division of Paperclips has 
Principal Security Consultant     | overrun the Pushpin Infantry and
SSH Communications Security, Inc. | General White-Out has called for 
Email: [EMAIL PROTECTED]               | a new skirmish. 
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