diff --git a/ChangeLog b/ChangeLog
index ff32573d7..3029fa80f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -45,6 +45,9 @@
    - stevesk@cvs.openbsd.org 2002/06/20 20:03:34
      [ssh_config sshd_config]
      refer to config file man page
+   - markus@cvs.openbsd.org 2002/06/20 23:05:56
+     [servconf.c servconf.h session.c sshd.c]
+     allow Compression=yes/no in sshd_config
  - (bal) Cygwin special handling of empty passwords wrong.  Patch by
    vinschen@redhat.com
 
@@ -975,4 +978,4 @@
  - (stevesk) entropy.c: typo in debug message
  - (djm) ssh-keygen -i needs seeded RNG; report from markus@
 
-$Id: ChangeLog,v 1.2229 2002/06/21 01:06:03 mouring Exp $
+$Id: ChangeLog,v 1.2230 2002/06/21 01:09:47 mouring Exp $
diff --git a/servconf.c b/servconf.c
index 7a776ac8e..b7f941ab5 100644
--- a/servconf.c
+++ b/servconf.c
@@ -10,7 +10,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: servconf.c,v 1.110 2002/05/15 21:56:38 markus Exp $");
+RCSID("$OpenBSD: servconf.c,v 1.111 2002/06/20 23:05:55 markus Exp $");
 
 #if defined(KRB4)
 #include <krb.h>
@@ -102,6 +102,7 @@ initialize_server_options(ServerOptions *options)
 	options->challenge_response_authentication = -1;
 	options->permit_empty_passwd = -1;
 	options->use_login = -1;
+	options->compression = -1;
 	options->allow_tcp_forwarding = -1;
 	options->num_allow_users = 0;
 	options->num_deny_users = 0;
@@ -224,6 +225,8 @@ fill_default_server_options(ServerOptions *options)
 		options->permit_empty_passwd = 0;
 	if (options->use_login == -1)
 		options->use_login = 0;
+	if (options->compression == -1)
+		options->compression = 1;
 	if (options->allow_tcp_forwarding == -1)
 		options->allow_tcp_forwarding = 1;
 	if (options->gateway_ports == -1)
@@ -278,7 +281,7 @@ typedef enum {
 	sPrintMotd, sPrintLastLog, sIgnoreRhosts,
 	sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
 	sStrictModes, sEmptyPasswd, sKeepAlives,
-	sUseLogin, sAllowTcpForwarding,
+	sUseLogin, sAllowTcpForwarding, sCompression,
 	sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
 	sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
 	sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups,
@@ -342,6 +345,7 @@ static struct {
 	{ "strictmodes", sStrictModes },
 	{ "permitemptypasswords", sEmptyPasswd },
 	{ "uselogin", sUseLogin },
+	{ "compression", sCompression },
 	{ "keepalive", sKeepAlives },
 	{ "allowtcpforwarding", sAllowTcpForwarding },
 	{ "allowusers", sAllowUsers },
@@ -704,6 +708,10 @@ parse_flag:
 		intptr = &options->use_login;
 		goto parse_flag;
 
+	case sCompression:
+		intptr = &options->compression;
+		goto parse_flag;
+
 	case sGatewayPorts:
 		intptr = &options->gateway_ports;
 		goto parse_flag;
diff --git a/servconf.h b/servconf.h
index c4e5b5f42..c94f541d0 100644
--- a/servconf.h
+++ b/servconf.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: servconf.h,v 1.57 2002/03/20 19:12:25 stevesk Exp $	*/
+/*	$OpenBSD: servconf.h,v 1.58 2002/06/20 23:05:55 markus Exp $	*/
 
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
@@ -98,6 +98,7 @@ typedef struct {
 	int     permit_empty_passwd;	/* If false, do not permit empty
 					 * passwords. */
 	int     use_login;	/* If true, login(1) is used */
+	int     compression;	/* If true, compression is allowed */
 	int	allow_tcp_forwarding;
 	u_int num_allow_users;
 	char   *allow_users[MAX_ALLOW_USERS];
diff --git a/session.c b/session.c
index f6f9c5448..6169f3307 100644
--- a/session.c
+++ b/session.c
@@ -33,7 +33,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: session.c,v 1.137 2002/06/11 05:46:20 mpech Exp $");
+RCSID("$OpenBSD: session.c,v 1.138 2002/06/20 23:05:55 markus Exp $");
 
 #include "ssh.h"
 #include "ssh1.h"
@@ -279,6 +279,10 @@ do_authenticated1(Authctxt *authctxt)
 				    compression_level);
 				break;
 			}
+			if (!options.compression) {
+				debug2("compression disabled");
+				break;
+			}
 			/* Enable compression after we have responded with SUCCESS. */
 			enable_compression_after_reply = 1;
 			success = 1;
diff --git a/sshd.c b/sshd.c
index 9ac43a882..feea3ce2c 100644
--- a/sshd.c
+++ b/sshd.c
@@ -42,7 +42,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: sshd.c,v 1.245 2002/06/11 05:46:20 mpech Exp $");
+RCSID("$OpenBSD: sshd.c,v 1.246 2002/06/20 23:05:56 markus Exp $");
 
 #include <openssl/dh.h>
 #include <openssl/bn.h>
@@ -1765,6 +1765,10 @@ do_ssh2_kex(void)
 		myproposal[PROPOSAL_MAC_ALGS_CTOS] =
 		myproposal[PROPOSAL_MAC_ALGS_STOC] = options.macs;
 	}
+	if (!options.compression) {
+		myproposal[PROPOSAL_COMP_ALGS_CTOS] =
+		myproposal[PROPOSAL_COMP_ALGS_STOC] = "none";
+	}
 	myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = list_hostkey_types();
 
 	/* start key exchange */