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If you can trace and ping the sites, it sounds like your address
blocks may be filtered at the destination or more likely, your L4
switches. First try telnetting to port 80 from both sides of the
switches, if you suspect it is they're side, run a ping against the
sites checking port 80 and varying your source addresses.
Also, first try pinging from the troublesome source IP's with large
packets, it could be a misconfigured circuit dropping your HTTP
requests but passing the tiny ping packets, I've seen this before on
x.25 links and could happen at any layer 2-3 device.
Erik Mintz
Director, IT operations
Crosslinks systems
1 Silicon alley plaza
New York, NY
10038
[EMAIL PROTECTED]
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From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
�� �� ��
Sent: Friday, July 14, 2000 5:16 AM
To: [EMAIL PROTECTED]
Subject: About accessing to some sites
This is kornet in korea. The kornet is one of ISPs in our nation.
Recently we have had difficulty in getting to some sites like
www.chez.com,www.com,www.yahoo.co.uk
www.blizard.com,www.polarismech.com.
Mostly we have got lots of calls from the customers who use ADSL
connection
with source ip address 211.38.0.0. they say they can traceroute
and
ping to the destinations but can't open
the sites on the web. With the ip space 168.126.0.0 that we
currently
use, we also can reach to
the sites but we can't open the two sites www.chez.com,www.com on the
web.
For your reference, our customers go through L4 switches and Net
caches.
we need your help!! if you need further more question, feel free to
ask us
!!!
from cho
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