scp and ssh 'cat' stalls at 64k bytes

[Brian Inglis]

On 2023-06-23 20:19, Dan Harkless via Cygwin wrote:
> On 6/23/2023 6:59 PM, Chris Roehrig via Cygwin wrote:
>> On 2023-06-23 18:26, Dan Harkless via Cygwin wrote:
>>> On 6/23/2023 5:19 PM, Chris Roehrig via Cygwin wrote:
>>> Yes, with all Cygwin64 updates, I was able to scp a file of a few MB 
>>> from Linux to Windows 10 with no issues. I also tried your 'cat'
>>> version, and that worked fine too.

>> Thanks. There must be some issue with my setup. Very odd that 'pv'
>> works, but 'cat' does not.  ldd shows they use identical libs.   I guess
>> I'll start with the pv and cat source.

> Before you resort to trawling through source, did you try a fresh Cygwin install 
> (either to a different directory, or after temporarily moving your current 
> tree)? Sometimes, e.g. if you use the same "packages" directory between two 
> different versions of Windows, I've found that Cygwin can get screwed up in 
> strange ways.

The -l|--local-package-dir DIR Local package directory just saves the downloaded 
tar file in case you want to do a reinstallation.
I would expect trying to share the same -R|--root DIR Root installation 
directory between different systems, when you can really only install on one, 
and each host system requires specific unique keys to be generated, could give 
you questionable setups.

Just try `cygcheck -c openssh coreutils pv` on each system to make sure the 
installs say OK, or run setup-x86_64 and Reinstall any faulty package.

On each system have you run /usr/bin/ssh-user-config, and run 
/usr/bin/ssh-host-config from an elevated admin account, customized or added 
host keys appropriately to /etc/sshd_config, /etc/ssh_config,
~/.ssh/{config,known_hosts,authorized_keys}, /etc/ssh/ssh_host_*_key.pub?

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer     but when there is no more to cut
                                 -- Antoine de Saint-Exupéry