On Mon, 28 May 2012, Timothy Normand Miller wrote:
I tried uploading a file via sftp, and it stalls out at 160K. So this is the cause of the problem. SSH is broken. Unfortunately, googling for ssh and stall isn't getting me anywhere.
Not sure if this is the same issue you're seeing or not, but I ran into something similar a while ago - when connected from less reliable networks, connections (especially rsync or scp) over SSH stalled after a short while - interactive sessions worked fine.
In my case, the issue was a too pedantic iptables configuration. When communicating with the server from a less reliable network, packets could arrive out of order. If the server received packets that iptables/conntrack didn't think belonged to the session, my config sent ICMP unreachable packets as response (-j REJECT), basically terminating the connection.
I fixed it by adjusting the iptables config to not send ICMP unreachable for this case. An alternative solution was to set sysctl "net.netfilter.nf_conntrack_tcp_be_liberal = 1" - this made the out of order packets still be counted as part of the session, not triggering the bad behaviour of my iptables config.
Again, not sure if this is related to your issue or not, but it at least a similar symptom.
// Martin -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html