similar to: [Bug 2147] New: OpenSSH remote forwarding of dynamic ports doesn't work when you create more than one

Hi ! Here's a patch to add remote port forwarding support (protocol 2) for openssh. I have tried to test that it works like it should but a more thorough testing is needed. This patch adds both client/server support. The patch should be applied to openssh-2.1.1p4 source tree. Also included is a PortForwarding sshd_config option, new ./configure option --disable-forwarding that should make it

I recently ran across a problem with remote port forwarding in OpenSSH when trying to use dynamic ports. While it is possible to use OpenSSH to request a dynamic port and the OpenSSH sshd handles it just fine, the OpenSSH client gets confused when multiple ports are opened this way, due to the information passed in the "forwarded-tcpip" SSH_MSG_CHANNEL_OPEN message which is sent back to

https://bugzilla.mindrot.org/show_bug.cgi?id=2189 Bug ID: 2189 Summary: Client fails to consider hostname when matching rfwd channel opens Product: Portable OpenSSH Version: -current Hardware: Other OS: All Status: NEW Severity: minor Priority: P5 Component: ssh

Hi, the attached patch implements adding and canceling of remote port forwardings by communicating with a running ssh client via a control socket. Thus, one can do this: ssh -MNfS ~/.ssh/ctl remotehost and then: ssh -S ~/.ssh/ctl -O add-rforward 2000:forward:80 localhost to add a new remote forwarding or ssh -S ~/.ssh/ctl -O cancel-rforward localhost:2000 localhost to remove it. The

Hi all, I'm very new in this list, as looking for codes to plug up the lack of functionality of "Protocol 2 Remote Forwardig". Fortunately, I could find it in MARC's archive. Mr. Jarno Huuskonen posted the codes in Sept, last year, and I tried applying it to my FreeBSD box environment. I couldn't apply an original patch, of course, for incompatibility of virsion. The

Hello, Today I tried using "dynamically assigned" port for remote listener, by requesting 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 /* *

Hi all, This is a client side only implementation of reversed dynamic (SOCKS) TCP forwarding, which means it is compatible with any existing servers have 'remote forward' capability. To establish such forward, use "ssh -R [BIND_ADDRESS:]PORT ...". The server will listen on that port and address and accept SOCKS traffics. Hope this will be useful for you. There was an

I could not find anything in the mailing list archive or bug tracker. In ssh2.h, the value (4) is re-used 148 #define SSH2_DISCONNECT_KEY_EXCHANGE_FAILED 3 149 #define SSH2_DISCONNECT_HOST_AUTHENTICATION_FAILED 4 150 #define SSH2_DISCONNECT_RESERVED 4 151 #define SSH2_DISCONNECT_MAC_ERROR 5 Is this intentional? Thanks, Noah Zalev

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

Hi ! Here's an experimental patch for openssh-2.1.1p4 to add support (to openssh client) for -R (protocol 2). So if you have access to a commercial ssh2 server (that allows port forwardings) could you test this patch. (Note the openssh server doesn't have support for -R with protocol 2 so testing with openssh server won't do much good). To test remember to use -o "Protocol

Le mardi 17 janvier 2017 ? 9:20 +1100, Darren Tucker a ?crit : > On Tue, Jan 17, 2017 at 1:30 AM, Romain Vimont <rom at rom1v.com> wrote: > [...] > > As a consequence, in particular, a SOCKS5 server started with "ssh -D" > > cannot proxify UDP packets. > > > > Are there deep reasons why OpenSSH does not implement them (security, or > >

Hello, I noticed a problem recently when running some test code against the OpenSSH 7.6p1 ssh-agent. These tests ran fine against OpenSSH 7.5p1 and earlier, but with OpenSSH 7.6p1, they were suddenly causing ssh-agent to exit. The request being made was a ?sign? request, and the point of the test was to have the sign operation fail. To trigger this, I was passing in an invalid key blob

https://bugzilla.mindrot.org/show_bug.cgi?id=2529 Bug ID: 2529 Summary: direct-streamlocal channel open doesn't match PROTOCOL documentation Product: Portable OpenSSH Version: -current Hardware: All OS: All Status: NEW Severity: normal Priority: P5 Component: ssh

https://bugzilla.mindrot.org/show_bug.cgi?id=2366 Bug ID: 2366 Summary: ssh-keygen doesn't correctly decode new format GCM-encrypted keys Product: Portable OpenSSH Version: 6.7p1 Hardware: All OS: All Status: NEW Severity: normal Priority: P5 Component:

Thanks for clarification. One question though: As far as I have tested openssh, it logs every unsuccessful authentication attempt on the very moment it becomes unsuccessful, not after the connection is closed (after timeout or when reaching max auth attempts). Is this true or not even for this attack or not? Because if it is true, if there is a IDS system that bans IP after X failed logins,

I would like to suggest adding a fallback in the event that somehow the sshd_config port number is invalid. Example: Port != (1<= or >=65535) By default fall by to port 22, and spit out an error. Same would go for if the new port is already in use, fall back to port 22 and spit out an error. Why is this a good idea? Would be a good idea because people are human and make mistakes, and you

On Nov 14, 2017, at 4:11 PM, Damien Miller <djm at mindrot.org> wrote: > On Mon, 13 Nov 2017, Ron Frederick wrote: >> I noticed a problem recently when running some test code against >> the OpenSSH 7.6p1 ssh-agent. These tests ran fine against OpenSSH >> 7.5p1 and earlier, but with OpenSSH 7.6p1, they were suddenly causing >> ssh-agent to exit. > > Sorry,

On Feb 17, 2020, at 9:45 PM, Damien Miller <djm at mindrot.org> wrote: > On Mon, 17 Feb 2020, Ron Frederick wrote: >> I?m trying out the ?resident key? functionality in OpenSSH 8.2, and >> I?m having trouble getting it to find keys that I?ve created. >> >> I?m trying to create a new resident key using: >> >> ssh-keygen -O resident -t ed25519-sk -f

Hi, sorry if it is the wrong approuch to suggest improvments to OpenSSH, but here comes my suggestion: I recently stumbled upon the scponly shell which in it's chroot:ed form is an ideal solution when you want to share some files with people you trust more or less. The problem is, if you use the scponlyc as shell, port forwarding is still allowed. This can of course be dissallowed in

On Jan 17, 2017, at 9:57 AM, Douglas E Engert <deengert at gmail.com> wrote: > On 1/16/2017 2:09 PM, Ron Frederick wrote: >> I?m working on an implementation of ?gssapi-with-mic? authentication for my AsyncSSH package and trying to get it to interoperate with OpenSSH. I?ve gotten it working, but there seems to be a discrepancy between the OpenSSH implementation and RFC 4462.