Re: tarsnap on Windows Server 2012 R2

[Paul Takemura <paul@awasebyte.com>]

At several points I confess to have deleted files from the cache, to attempt to start-from-scratch, but I've restored it now, using the --fsck option.

Administrator@ab-1 /usr/local/tarsnap-cache
$ whoami
Administrator

Administrator@ab-1 /usr/local/tarsnap-cache
$ ls -l
total 2
lrwxrwxrwx 1 Administrator None 64 Jul 23 07:09 cseq -> d69979bf2f84c1ace96e5dcbb137ce25987dc18d493b4f559d960bba2999a55e
-rw-r--r-- 1 Administrator None 24 Jul 23 07:09 directory
-rw-r--r-- 1 Administrator None  0 Jul 22 11:51 lockf

Also, at one point a couple of days ago, I suspected network issues and, so, created explicit outbound rules to allow connection to port 9279 on the internal firewall (Windows Server) and the external firewall (Alibaba Cloud). I then tested the ability to get outside by setting up netcat listening on port 9279 on an external server and connecting to that from the Windows machine.

I rebooted the Windows machine after making the firewall changes.

It did seem that some kind of connection had been made to a Tarsnap server, but in my quest for A-Z satisfaction I deleted whatever bits were there using tarsnap -d and also, later, tarsnap --nuke.

I will look more closely at the Alibaba Cloud firewall, and yes, I can try an older version of tarsnap.

Paul

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐

On July 23, 2018 12:18 AM, Colin Percival <cperciva@tarsnap.com> wrote:

> ​​
> 
> On 07/22/18 01:05, Paul Takemura wrote:
> 
> > tarsnap-keygen seems to work fine too (exit code is 0).
> > 
> > Unfortunately, tarsnap seems to hang when using the -c option. I see that data
> > 
> > has been written to the cache directory, but that may only be the metadata, I
> > 
> > don't know.
> 
> Can you show me a listing of that directory?
> 
> > Does anyone have experience using tarsnap on Windows Server R2 and Cygwin?
> > 
> > Here is an example invocation of tarsnap that hangs:
> > 
> > Administrator@ab-1 ~
> > 
> > $ tarsnap -c --dry-run -v -C /home/Administrator/ -f ab-1-1807221600 paultemp
> 
> Interesting. Can you try an earlier version of tarsnap in case we broke
> 
> something?
> 
> The most common cause for "tarsnap-keygen works but tarsnap doesn't" is
> 
> network MTU issues -- but that (a) shouldn't be a problem on cloud systems,
> 
> and (b) should eventually produce errors with tarsnap can't communicate with
> 
> the server. Simply hanging is not a symptom I've heard about before.
> 
> 
> -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> 
> Colin Percival
> 
> Security Officer Emeritus, FreeBSD | The power to serve
> 
> Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid