- djm@cvs.openbsd.org 2009/02/14 06:35:49

     [PROTOCOL]
     mention that eow and no-more-sessions extensions are sent only to
     OpenSSH peers

1 files changed, 12 insertions, 1 deletions

diff --git a/PROTOCOL b/PROTOCOL
index 37fd536d..5aada630 100644
--- a/PROTOCOL
+++ b/PROTOCOL
@@ -64,6 +64,12 @@ remain open after a "eow@openssh.com" has been sent and more data may
 still be sent in the other direction. This message does not consume
 window space and may be sent even if no window space is available.
 
+NB. due to certain broken SSH implementations aborting upon receipt
+of this message (in contravention of RFC4254 section 5.4), this
+message is only sent to OpenSSH peers (identified by banner).
+Other SSH implementations may be whitelisted to receive this message
+upon request.
+
 4. connection: disallow additional sessions extension
    "no-more-sessions@openssh.com"
 
@@ -87,6 +93,11 @@ connection.
 Note that this is not a general defence against compromised clients
 (that is impossible), but it thwarts a simple attack.
 
+NB. due to certain broken SSH implementations aborting upon receipt
+of this message, the no-more-sessions request is only sent to OpenSSH
+servers (identified by banner). Other SSH implementations may be
+whitelisted to receive this message upon request.
+
 5. connection: Tunnel forward extension "tun@openssh.com"
 
 OpenSSH supports layer 2 and layer 3 tunnelling via the "tun@openssh.com"
@@ -240,4 +251,4 @@ The values of the f_flag bitmask are as follows:
 Both the "statvfs@openssh.com" and "fstatvfs@openssh.com" extensions are
 advertised in the SSH_FXP_VERSION hello with version "2".
 
-$OpenBSD: PROTOCOL,v 1.11 2008/07/05 05:16:01 djm Exp $
+$OpenBSD: PROTOCOL,v 1.12 2009/02/14 06:35:49 djm Exp $