On 03/17/2015 08:38 PM, Rick Stevens wrote:
On 03/17/2015 05:23 PM, Robert Moskowitz wrote:
This is really a problem that I have had since I installed F21. It was
a clean install, not an update.
Anyway, when I connect to various servers that are setup for user/paswd
login, it is a while before I see the password prompt.
After working on the system for a while, the session is suddenly
unresponsive. I can ping the destination, but nothing in the ssh
session. Usually after some time (more than a minute) the session
resumes responding.
If I leave a session connected and move away from it, eventually I get a
"Write failed: Broken pipe"
All the systems I am connecting to are on other networks, so I am going
through a firewall that permits my ssh connections.
Any hints where to look? Wireshark is not showing me anything, but I
may just be using the wrong filters.
In my experience, a slow ssh password prompt is due to DNS lookup
issues--particularly reverse DNS (ipaddr-to-hostname) lookups. If the
remote machine is having trouble doing a reverse DNS lookup on your
client IP, then you just have to wait for the DNS to time out before you
get the password prompt.
I am on an rfc1918 address (my own rfc!) with non-nated connection to
the servers. I own the DNS, so I will set up the rDNS.
As to why it slows down, could be any number of other things. Are you
on a VPN? Are you getting your IP via a DHCP server? Are you on a
broadband connection?
No VPN. All native IPv4 everything is routed. Firewall is open in both
directions for my SSH port.
I am getting my IP via DHCP. I can fix it to my MAC and setup the rDNS.
All local traffic on 100Mb ethernet and the Juniper firewall is rated at
150MB throughput.
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