search for: listen_port

...ng listener on port 0. This is supposed to create a listener on a port choosen by server. Everything seemed OK (the choosen port was sent back to client), but forwarding was refused. So I checked the source. in channels.c, function: channel_setup_fwd_listener /* * listen_port == 0 requests a dynamically allocated port - * record what we got. */ if (type == SSH_CHANNEL_RPORT_LISTENER && listen_port == 0 && allocated_listen_port != NULL && *allocated_listen_po...

These patches implement a new mux client request to list the currently opened TCP forwardings. It also removes some todos regarding keeping the list of forwardings in the options up-to-date. Bert Wesarg (6): attach the forwarding type to struct Forward merge local and remote forward lists generate unique ids for forwardings to be used for identification remove closed forwardings from

...4-08-05 12:55:16.101830360 -0700 @@ -86,6 +86,7 @@ * network (which might be behind a firewall). */ typedef struct { + char *listen_host; /* Address to listen on */ char *host_to_connect; /* Connect to 'host'. */ u_short port_to_connect; /* Connect to 'port'. */ u_short listen_port; /* Remote side should listen port number. */ @@ -2146,8 +2147,7 @@ char ntop[NI_MAXHOST], strport[NI_MAXSERV]; success = 0; - host = (type == SSH_CHANNEL_RPORT_LISTENER) ? - listen_addr : host_to_connect; + host = host_to_connect; if (host == NULL) { error("No forward host n...

...0:localhost:22 user at remote', please let me know! --- serverloop.c.original 2009-10-21 10:45:13.000000000 +0300 +++ serverloop.c 2009-10-21 10:53:09.000000000 +0300 @@ -1119,9 +1119,9 @@ if (!options.allow_tcp_forwarding || no_port_forwarding_flag || (!want_reply && listen_port == 0) #ifndef NO_IPPORT_RESERVED_CONCEPT - || (listen_port < IPPORT_RESERVED && pw->pw_uid != 0) + || (listen_port !=0 && listen_port < IPPORT_RESERVED && pw->pw_uid != 0) #endif ) { success = 0; packet_send_debug("Server has disab...

...X_FORWARDS_PER_DIRECTION) fatal("channel_request_remote_forwarding: too many forwards"); - permitted_opens[num_permitted_opens].host_to_connect = xstrdup(host_to_connect); - permitted_opens[num_permitted_opens].port_to_connect = port_to_connect; - permitted_opens[num_permitted_opens].listen_port = listen_port; - num_permitted_opens++; - /* Send the forward request to the remote side. */ if (compat20) { const char *address_to_bind = "0.0.0.0"; packet_start(SSH2_MSG_GLOBAL_REQUEST); packet_put_cstring("tcpip-forward"); - packet_put_char(0); /* boolean: wan...

...erver-side port (by setting > GatewayPorts=clientspecified in the server config and binding to > different addresses), the client always matches on the first listener > with that port, as seen in the following code snippet: > > Channel * > channel_connect_by_listen_address(u_short listen_port, char *ctype, char *rname) > { > int i; > > for (i = 0; i < num_permitted_opens; i++) { > if (permitted_opens[i].host_to_connect != NULL && > port_match(permitted_opens[i].listen_port, listen_port)) { >...

...X_FORWARDS_PER_DIRECTION) fatal("channel_request_remote_forwarding: too many forwards"); - permitted_opens[num_permitted_opens].host_to_connect = xstrdup(host_to_connect); - permitted_opens[num_permitted_opens].port_to_connect = port_to_connect; - permitted_opens[num_permitted_opens].listen_port = listen_port; - num_permitted_opens++; - /* Send the forward request to the remote side. */ if (compat20) { const char *address_to_bind = "0.0.0.0"; @@ -1553,19 +1653,109 @@ packet_put_char(0); /* boolean: want reply */ packet_put_cstring(address_to_bind); packet_put_in...

...X_FORWARDS_PER_DIRECTION) fatal("channel_request_remote_forwarding: too many forwards"); - permitted_opens[num_permitted_opens].host_to_connect = xstrdup(host_to_connect); - permitted_opens[num_permitted_opens].port_to_connect = port_to_connect; - permitted_opens[num_permitted_opens].listen_port = listen_port; - num_permitted_opens++; - /* Send the forward request to the remote side. */ if (compat20) { const char *address_to_bind = "0.0.0.0"; packet_start(SSH2_MSG_GLOBAL_REQUEST); packet_put_cstring("tcpip-forward"); - packet_put_char(0); /* boolean: wan...

Hi, Just a usecase that I'm sure has been covered before but just in case its not an openssh solution would be very helpful. I was trying to install software on a server that was firewalled so no outbound http connections would work. I was also tunnelling via another server. Outbound ssh connections also were a convenient option. What would have been nice would be a remote version of

...ling fatal() to indicate that the port forwarding failed. Here is the patch: --- serverloop.c.orig Sat Feb 22 11:35:39 2003 +++ serverloop.c Sat Feb 22 11:19:29 2003 @@ -989,6 +989,9 @@ /* Start listening on the port */ success = channel_setup_remote_fwd_listener( listen_address, listen_port, options.gateway_ports); + if( !success ){ + fatal("Cannot bind to the remote port"); + } } xfree(listen_address); } And, here is the commandline that I used to initiate the connection: while :; do ssh -N -R 5000:localhost:5000 user at remotesy...

...-3.0.2p1/channels.c openssh-3.0.2p1-NewFeature/channels.c --- openssh-3.0.2p1/channels.c Thu Oct 11 20:35:05 2001 +++ openssh-3.0.2p1-NewFeature/channels.c Sat Jan 5 15:36:10 2002 @@ -2057,11 +2057,11 @@ * channel to host:port from remote side. */ int -channel_request_local_forwarding(u_short listen_port, const char *host_to_connect, - u_short port_to_connect, int gateway_ports) +channel_request_local_forwarding(const char *listen_host, u_short listen_port, + const char *host_to_connect, u_short port_to_connect, int gateway_ports) { return channel_request_forwarding( - NULL, listen_por...

...2 diff -u -p -r1.102 serverloop.c --- serverloop.c 25 Jun 2002 23:17:37 -0000 1.102 +++ serverloop.c 4 Jul 2002 09:13:34 -0000 @@ -972,8 +972,11 @@ server_input_global_request(int type, u_ /* check permissions */ if (!options.allow_tcp_forwarding || - no_port_forwarding_flag || - (listen_port < IPPORT_RESERVED && pw->pw_uid != 0)) { + no_port_forwarding_flag +#ifndef NO_IPPORT_RESERVED_CONCEPT + || (listen_port < IPPORT_RESERVED && pw->pw_uid != 0) +#endif + ) { success = 0; packet_send_debug("Server has disabled port forwarding.&qu...

...-m tcp -p tcp --dport 21 -j ACCEPT again, normal ftp fine. vsftp file below are the additional commands I entered to get ssl/tls up and running. pam_service_name=vsftpd userlist_enable=YES tcp_wrappers=YES ssl_enable=YES implicit_ssl=yes <--- tried with and without this and the port 21 below listen_port=21 <-- see above allow_anon_ssl=NO force_local_data_ssl=NO <-- set this to yes so I can still test normal functions force_local_logins_ssl=NO ssl_tlsv1=YES ssl_sslv2=NO ssl_sslv3=NO rsa_cert_file=/etc/pki/tls/certs/vsftpd.pem ssl_ciphers=HIGH <-- this was added as I was using filezilla an...

...vsftpd configuration: anonymous_enable=NO local_enable=YES write_enable=YES local_umask=022 dirmessage_enable=YES xferlog_enable=YES connect_from_port_20=YES xferlog_file=/var/log/vsftpd.log xferlog_std_format=YES idle_session_timeout=600 data_connection_timeout=120 ftpd_banner=Welcome listen=YES listen_port=21 pasv_enable=YES pasv_min_port=50000 pasv_max_port=50100 pasv_address=public-ip port_enable=YES pasv_addr_resolve=NO listen_ipv6=NO pam_service_name=vsftpd userlist_enable=YES tcp_wrappers=YES Connecting from localhost to the local ip with ftp command, I've no problems. If I try to connect...

I''m using puppetlabs/firewall with Puppet 2.7.2, and for the most part it''s working great. I have this in my sites.pp, which I took from this list sometime ago, to save firewall rules to disk when they''re changed: # Always persist firewall rules if ($kernel == ''Linux'') { exec { ''persist-firewall'':

...X_FORWARDS_PER_DIRECTION) fatal("channel_request_remote_forwarding: too many forwards"); - permitted_opens[num_permitted_opens].host_to_connect = xstrdup(host_to_connect); - permitted_opens[num_permitted_opens].port_to_connect = port_to_connect; - permitted_opens[num_permitted_opens].listen_port = listen_port; - num_permitted_opens++; - /* Send the forward request to the remote side. */ if (compat20) { const char *address_to_bind = "0.0.0.0"; @@ -1534,7 +1534,28 @@ * Wait for response from the remote side. It will send a disconnect * message on failure, and we wil...

...ding is cancelled the element is not really freed. It is marked somehow to be not in use but the current code cannot reuse it. 4) again permitted_opens. channel_request_rforward_cancel() identifies the local side of a forwarding only by permitted_opens[i].host_to_connect and permitted_opens[i].listen_port. Since a forwarding is really a quadruple this looks a little fragile to me. In fact you can try to remove a forwarding by specifying only a port number ssh -S ~/.ssh/ctl -O cancel-rforward 2000 localhost This matches an element of permitted_opens and resets it but it does not match an open...

https://bugzilla.mindrot.org/show_bug.cgi?id=2147 Bug ID: 2147 Summary: OpenSSH remote forwarding of dynamic ports doesn't work when you create more than one Product: Portable OpenSSH Version: -current Hardware: All OS: All Status: NEW Severity: normal Priority: P5

On Thu, May 04, 2017 at 09:37:59AM +1000, Adam Eijdenberg wrote: > Hi Devin, have you looked at using openssh certificates to help manage [...] > While the feature has been around for a while now (and is really > useful), there doesn't seem to be huge amount of documentation around > it. I found the following useful when getting a client of my running Yeah, when I wrote about it

...rding connection to %s port %d", target, target_port); /* XXX check permission */ sock = channel_connect_to(target, target_port); @@ -973,12 +974,10 @@ fatal("server_input_global_request: no user"); listen_address = packet_get_string(NULL); /* XXX currently ignored */ listen_port = (u_short)packet_get_int(); - debug("server_input_global_request: tcpip-forward listen %s port %d", - listen_address, listen_port); /* check permissions */ - if (!options.allow_tcp_forwarding || - no_port_forwarding_flag + if (!options.permit_tcp_listen || + auth_r...