similar to: user input in clientloop.c

Using OpenSSH_8.3p1 I had an open (working) connection to some other box; after a bit of inactivity, some device in the middle seems to have forgotten about the TCP connection (NAT) and broke it. I've got an EscapeChar defined, though; so first I tried to send a BREAK and, when that didn't help (TCP already gone, packets get lost!), I tried (just out of curiosity) a Rekey. Now I can see

Hi, when trying to optimize socket transfer rates under Cygwin, it turned out that the underlying WinSock implementation is surprisingly sensitive to buffer sizes. The latest Cygwin from CVS is now setting the socket receive/send buffers (SO_RCVBUF/SO_SNDBUF) to 64K, rather than keeping them at their default values of 8K which thwarts data transfers a lot. While testing I still had the problem

http://bugzilla.mindrot.org/show_bug.cgi?id=52 dtucker at zip.com.au changed: What |Removed |Added ---------------------------------------------------------------------------- OtherBugsDependingO| |1274 nThis| | ------- You are receiving this mail because: ------- You are the assignee for

The command "ssh ls -l /doesnotexist" gives various responses: Running from a 200 MHz PentiumPro with dsa key added to ssh-agent: Mistakes worst to fast machine: To a faster 600 MHz dual processor i686 600 MHz machine: ls: /doesnotexist: No such file or directory -- correct nothing at all -- wrong ls: select: Bad file descriptor -- wrong

https://bugzilla.mindrot.org/show_bug.cgi?id=1548 Summary: Double free in OpenSSH clientloop.c/xmalloc.c via cmdline port forwarding Product: Portable OpenSSH Version: 5.1p1 Platform: All OS/Version: All Status: NEW Severity: normal Priority: P2 Component: ssh AssignedTo:

I was trying to modify the way openssh client (3.9.1p) handles keyboard input (regular input, once the connection is made). I modified the client_process_input function, but it seems that it was never called. I confirmed this with gdb - setting a breakpoint on that function never tripped. Obviously, there must be some other function that openssh uses to read keyboard input, but I can't find

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

In our work with enabling large windows for openssh we found 1) that if a window > 0x10000 is advertised to openssh's sshd 2) the sshd tries to send more than 0x10000 bytes of data 3) the receiver does not consume them 4) the input buffer will grow larger than the size allowed by buffer.c and fatal(). We believe the correct behavior is to limit reading into the channel input buffer to

The current code for channel.c creates an array of Channel structs (initially set to NULL) which is then iterated through, in full, every time a channel needs to be dealt with. If only one channel is in use, which is relatively common, the code still loops through the entire array. This patch creates a linked list of pointers to these structs and the code steps through the linked list. Since

On Thu, 3 Aug 2023, Chris Rapier wrote: > Howdy all, > > So, one night over beers I was telling a friend how you could use the timing > between key presses on a type writer to extract information. Basically, you > make some assumptions about the person typing (touch typing at so many words > per second and then fuzzing the parameters until words come out). > > The I

Hi, How do the communication between sshd and program happens when compat20 is enabled? There are two function process_buffered_input_packets and process_input, but in both cases if compat20 is enabled its just buffering the packets, but how do sshd will the command to program for execution? Regards prasad

I am utilizing an openssh tunnel between two Linux boxes. On the client box I issue the following commands to set up the tunnel; - ssh -w0:0 root at x.x.x.x -v where x.x.x.x is the IP address of the Linux system running sshd - ip addr add 10.0.5.1/32 peer 10.0.5.2 dev tun0 - ip link set tun0 up On the box running sshd I issue the following commands: - ip addr add 10.0.5.2/32 peer 10.0.5.1 dev

Hello all, This is a problem and patch reported to Red Hat Bugzilla by Jonathan Kamens <jik at kamens.brookline.ma.us>. I'm just acting as a relay :-) jik has experienced some weird crashes relating to window size changes or some similar activity. These are rather hard to trace. Problem was fixed by patching clientloop, where fd_set structures appear to be improperly zeroed (bytes vs

The 4.6p1 sshd is logging this error during remote commands or file transfers: error: channel 0: chan_read_failed for istate 3 Platform is Solaris 8, 4.6p1 + OpenSSL 0.9.8d. The commands and transfers work correctly, so the error message appears to be spurious. The error message does not appear when processing logins. Otherwise 4.6p1 is running without any apparent problems. This error

Howdy all, So, one night over beers I was telling a friend how you could use the timing between key presses on a type writer to extract information. Basically, you make some assumptions about the person typing (touch typing at so many words per second and then fuzzing the parameters until words come out). The I found a paper written back in 2001 talked about using the interpacket timing in

Since we upgraded OpenSSH from 5.0p1 to 5.1p1 on our Solaris 8 boxes (I know, I know, we should upgrade or retire them...), we've started experiencing problems with slogin'ing into these boxes, running vi, and pasting text into the vi session. As long as we are pasting in less that 1024 characters it's fine. With >= 1024 characters, the session hangs. If you run

Hi, We have upgraded the openssh 4.6P1 on Solaris 8 servers. After upgrade we get the below error message whenever we execute the remote commands using ssh. Please let me know what the fix is for this. Apr 8 03:03:43 dvsrv10 sshd[25379]: [ID 800047 auth.info] Accepted publickey for osteam from 10.0.93.31 port 35856 ssh2 Apr 8 03:03:50 dvsrv10 sshd[25381]: [ID 800047 auth.error] error:

System: Linux 2.4.18, openssh-3.4p1 Problem: I use "ssh" and "tar" to backup remote directory trees to a local hard-disk/file-system: # ssh remote.server.org "tar -cz /home" >/backup/remote.tar.gz If the backup-file-system runs out of space before the backup completes, ssh starts hanging (waiting for the stdout-write to complete). Analysis: In

Hi, At the n2k10 OpenBSD network hackathon, I finally got some time to clean up and rewrite the ssh(1) client multiplexing code. The attached diffs (one for portable OpenSSH, one for OpenBSD) are the result, and they need some testing. The revised multiplexing code uses a better protocol between the master and slave processes and I even bothered to write it up :) It tracks the control sockets

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, Basic context for my questions: Client (ssh) and server side (sshd) where the client use -L option for a direct-tcpip channel and forward all requests. (All Linux and openssh version 5.9p1). $ ssh -L8080:<some-ip>:8181 ... I noticed that when a third client send data to the local port (8080) used for forwarding, a channel is created: