up2date: Network is Unreachable

[Jonathan Allen]

Rodolfo,

> You said the hub can be pinged from all nodes. Ok, but icmp does not
> work on proxy. Try reaching this servers with proxyed lynx from your
> proxy and your nodes. Could be a DNS issue.

The hub can ping all the nodes by name and IP; the nodes can ping the hub
by name and IP.

   # up2date -v -u --proxy=http://localhost:3128

on the hub works fine.

   # nslookup
   > fedora.redhat.com
   Server:         192.168.1.63
   Address:        192.168.1.63#53

   Non-authoritative answer:
   fedora.redhat.com       canonical name = www.redhat.com.
   Name:   www.redhat.com
   Address: 209.132.177.50
   >

works OK on all the nodes.  Lynx works happily on all the nodes.  The update
progress on all the hubs:

   # up2date -v -u --proxy=http://192.168.1.63:3128

produces:

   http://fedora.redhat.com/download/up2date-mirrors/fedora-core-2
   http://fedora.redhat.com/download/up2date-mirrors/updates-released-fc2
   Traceback (most recent call last):
     File "/usr/sbin/up2date", line 1271, in ?
       sys.exit(main() or 0)
     ...
     File "/usr/lib/python2.3/urllib2.py", line 326, in open
       '_open', req)
     File "/usr/lib/python2.3/urllib2.py", line 306, in _call_chain
       result = func(*args)
     File "/usr/lib/python2.3/urllib2.py", line 901, in http_open
       return self.do_open(httplib.HTTP, req)
     File "/usr/lib/python2.3/urllib2.py", line 886, in do_open
       raise URLError(err)
   urllib2.URLError: <urlopen error (101, 'Network is unreachable')>
   #

Jonathan