Re: Can't ping certain ip through route
From: Herb Martin (news_at_LearnQuick.com)
Date: 01/28/05
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Date: Fri, 28 Jan 2005 14:30:11 -0600
Ping may be blocked at firewalls or you may
have a real routing or ip problem so the first
step when ping fails (by address) is to TRACERT
or PATHPING (I don't like this one as it is too
slow due to spending a lot of time gathering extra
info that I almost never use.)
tracert WHEREVER
See how far you get...the problem may be right there,
or just beyond, or even on the way back to you but
at least you get a closer idea of the problem location.
If you have routing (ping is blocked but there are still
limited connections) only on specific ports you will
need to either open or test for that....
> I'm trying to setup publishing on my 2 SQL servers for backup purposes.
> Main SQL server - (win2k)2 node clustered sql server with ip address of
> 192.168.0.245
> Backup SQL server - (win2k)ip address of 192.168.1.2
>
> I have a VPN connection set up between the two. I also have DFS
> running that works fine through the routes.
Interesting. Any port filters?
> The routing is working fine. From the backup server, I can ping EVERY
> SINGLE IP in the 192.168.0.0/27 range EXCEPT the sql server ip
> (192.168.0.245). I can even ping the cluster IP that the SQL service
> resides which is .250
Is it possible the SQL server has disabled Ping responses
with either the Firewall or an add-on firewall or other
filter?
> >From a pc in the 192.168.0.0/27 network, I can connect to .245 fine.
>
> I'm honestly a bit lost of even where to look for solutions on this.
> Any suggestions or ideas would be greatly appreciated
If running on Win2003 (or XP) I would strongly suspect the
new built-in firewall.
If running on Win2000 (this newsgroup) I would strongly
suscect any ADD-ON firewall (Symantic, Outpost, etc.)
For both, I would look to filtering firewalls or routers between
the two.
> *Note: the clustered sql server is working fine and not the issue (it's
> been running the way it is for about 2 yrs now)
I don't know the specific ports you are needing but you can
use Telnet to test if it is TCP, or NetCat (nc.exe download
by searching Google) if it is EITHER TCP or UDP.
telnet WHEREVER PORTNUMBER
(portnumber is TCP only, won't work for UDP)
If you get ANY kind of connection (even a blank screen or
gargage) then you probably connected and the problem is
not likely due to filtering/firewalls but is authentication or
something else.
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