Harald Hoyer wrote:
Kevin Kempter wrote:
Hi List;
First let me say that (1) I have a fairly unusual (I suspect) ssh setup, and (2) I hate the virus known as windows
Here's the deal;
The client I'm working for uses a SonicWall firewall to control access to the data centers. Unfortunately there are issues with the Linux openVPN clients (specifically open swan) where it connects but locks
openvpn != openswan. openvpn works fine for me, I have it working perfectly. All it needs is UDP port 1194 (the standard port) open, and if the other end's not on the firewall, then the firewall needs to forward UDP port 1194 to the correct host.
I haven't (and probably won't) used SonicWall, all my firewall needs are met with shorewall on Linux.
all other connections out of the firewall. So, until we figure this out the solution is to use the windows version of the SonicWall client. I've installed vmware and installed a copy of VirusXP (AKA Windows XP). I installed cygwin and followed the instructions here to install the ssh server: ( http://pigtail.net/LRP/printsrv/cygwin-sshd.html ) although I did not run the mkpasswd and mkgroup commands, they seemed to break the install of ssh server.
Anyway, I also setup an ssh key so I could login to the M of VirusXP without a password. Next I setup a config file in my Linux $HOME/.ssh dir with many entries like this (one for each host in the data ceners that I need to connect to):
Host dataCenterHostname Hostname 10.1.x.x # data center I.P. HostKeyAlias 10.1.x.x # data center I.P. ProxyCommand /usr/local/bin/netcat-proxy-command 172.16.128.128 %h
The 172.16.128.128 I.P. addr is the I.P. of the VirusXP image within vmware via nat. (I could not make the ssh connections work via bridged networking).
The /usr/local/bin/netcat-proxy-command script is a netcat (nc) script and contains this:
#!/bin/sh gateway=$1 internal=$2 ssh $gateway nc -w 1 $internal 22
To use this setup I boot up VirusXP, open the SonicWall VPN client and connect to one or more of the data centers. Then in Fedora 7 (the host OS) I open a terminal and run this: ssh dataCenterHostname
so, to my issue. Most of the time this setup works fairly well, in that it does connect. It usually takes about 30 seconds for me to get a password prompt for the target data center host. This is acceptable but I think there's something weird going on that delay's the connection. I say this because I can open a cygwin windowin VirusXP and do an ssh <I.P.> and I get a password prompt immediately.
Sounds to me like you're getting three DNS timeouts. Make sure all IP addresses resolve at both ends.
The main issue is that several times a day the connections start to take several minutes to return the password prompt. I need to restart the cygwin service in VirusXP, and sometimes that doesn't help so I reboot the VM instance of VirusXP. This is quite frustrating, however I'm a DBA and have limited networking knowledge. Does anyone have any thoughts?, suggestions?, comments?
Thanks in advance..
You may try:
Host dataCenterHostname: GSSAPIAuthentication no
in ~/.ssh/config
These are times I get: 08:56 [summer@numbat ~]$ time ssh school date Sat Oct 13 08:56:57 WST 2007
real 0m4.649s user 0m0.020s sys 0m0.016s 08:56 [summer@numbat ~]$ time ssh cdm date Sat Oct 13 08:58:40 WST 2007
real 0m0.568s user 0m0.020s sys 0m0.017s 08:56 [summer@numbat ~]$
"School" is in the 'net, one another ADSL user, while "cdm" is just two wireless networks away.