Wireshark mailing list archives
Re: Having trouble cloning repo in a new VM
From: Jim Young <jim.young.ws () gmail com>
Date: Wed, 19 May 2021 09:20:54 -0400
Hello Martin, On Wed, May 19, 2021 at 7:09 AM Martin Mathieson via Wireshark-dev <wireshark-dev () wireshark org> wrote:
... when I try to clone it starts to go through the stages (i.e. counting/compressing/ receiving objects/resolving objects) I am told 'Connection to gitlab.com closed by remote host' ... Any ideas?
Have you made a pcap? ;-) Seriously it might give you a clue as to what side may be responsible for the issue. Several years ago (~April thru June 2017) I was having intermittent problems simply doing a `git pull`. At times I would have to retry the `git pull` a dozen times or more before it would complete successfully. A client side packet capture showed that my machine was receiving TCP RSTs purportedly generated by the git server. These TCP RSTs had an IP TTL value one higher than the other TCP packets from the `git pull` conversation. The IP TTL value in the RST packets implied some middle box was responsible for synthesizing the TCP RSTs. Interestingly there were lots of TCP RSTs, but most of them were "benign". The benign RSTs did not cause the TCP session to stop prematurely because the TCP sequence number in the RST packets were apparently "too old" (had already been acknowledged) and were ultimately ignored by the TCP stack. But occasionally these TCP RSTs would actually cause the TCP connection to fail and the git client would ultimately time out. I managed to contact the git server admin ;) and we coordinated a packet trace on the server side. We determined that a middle box would generate the TCP RSTs when the git client's TCP packets arrived out-of-order. A config change was made on the middle box to its tcp connection tracking which ultimately resolved the intermittent `git pull` issues. Best regards, Jim Y. ___________________________________________________________________________ Sent via: Wireshark-dev mailing list <wireshark-dev () wireshark org> Archives: https://www.wireshark.org/lists/wireshark-dev Unsubscribe: https://www.wireshark.org/mailman/options/wireshark-dev mailto:wireshark-dev-request () wireshark org?subject=unsubscribe
Current thread:
- Having trouble cloning repo in a new VM Martin Mathieson via Wireshark-dev (May 19)
- Re: Having trouble cloning repo in a new VM Jim Young (May 19)
- Re: Having trouble cloning repo in a new VM Martin Mathieson via Wireshark-dev (May 19)
- Re: Having trouble cloning repo in a new VM Roland Knall (May 19)
- Re: Having trouble cloning repo in a new VM Martin Mathieson via Wireshark-dev (May 19)
- Re: Having trouble cloning repo in a new VM Gerald Combs (May 27)
- Re: Having trouble cloning repo in a new VM Martin Mathieson via Wireshark-dev (May 27)
- Re: Having trouble cloning repo in a new VM Jim Young (May 27)
- Re: Having trouble cloning repo in a new VM Martin Mathieson via Wireshark-dev (May 19)
- Re: Having trouble cloning repo in a new VM Jim Young (May 19)