well, go and search for the firewalls on the way now.
with a clear conscience.
:)
Taylan Yetkin wrote:
I couldn't find how to capture ipv6 packets but I disabled it to see if
it makes any difference. Actually I still get the same
assuming your interface of question is eth0:
tcpdump -vvv -i eth0 -w results.tcpdump ip6
this will run as much as you want, and will print how many packets has it got,
once in a while.
when you have enough, you stop it with ^C, and go and watch the results of the
capture via wireshark, or ethereal or any other graphical tool.
regards.
cvs [login aborted]: connect to
neutralino.physics.uiowa.edu(128.255.34.167):2401 failed: No route to host
message. telnet is also giving similar problem:
telnet neutralino.physics.uiowa.edu 2401
Trying 128.255.34.167...
telnet: Unable to connect to remote host: No route to host
:
Maxim kovgan wrote:
Can you try and capture any ipv6 packets trying to leave your computer
when you're trying to login into cvs or to do other things with cvs ?
IF you find anything running, disable ipv6.
(refer to your distribution's manual on how to do this.)
Cheers.
Taylan Yetkin wrote:
Hi,
ifconfig in the host returns:
eth0 Link encap:Ethernet HWaddr 00:19:D1:25:1F:C9
inet addr:128.255.34.167 Bcast:128.255.35.255
Mask:255.255.252.0
inet6 addr: fe80::219:d1ff:fe25:1fc9/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:190785 errors:0 dropped:0 overruns:0 frame:0
TX packets:55961 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:57983176 (55.2 MiB) TX bytes:11357915 (10.8 MiB)
Base address:0xecc0 Memory:dffe0000-e0000000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:5670 errors:0 dropped:0 overruns:0 frame:0
TX packets:5670 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:10405386 (9.9 MiB) TX bytes:10405386 (9.9 MiB)
while netstat -nr returns
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window
irtt Iface
128.255.32.0 0.0.0.0 255.255.252.0 U 0
0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0
0 0 eth0
0.0.0.0 128.255.32.1 0.0.0.0 UG 0
0 0 eth0
Taylan
Maxim kovgan wrote:
Taylan Yetkin wrote:
Both ping and traceroute the host from fermi machines returns
success. I need some time to understand the use of tcpdump.
thanks,
Taylan
can you post your ifconfig of the listening interface ?
a routing table would be nice too:
netstat -nr
you can of course scramble the IP addresses.
Maxim kovgan wrote:
John Summerfield wrote:
Maxim kovgan wrote:
John Summerfield wrote:
Taylan Yetkin wrote:
Hi,
I installed a cvs repository in my local SL machine and trying
to connect
it
from fermi machines. I get the following error:
[cmswn085> cvs login
Logging in to
:pserver:[EMAIL PROTECTED]:2401/var/lib/
cvsroot
CVS password:
cvs [login aborted]: connect to
neutralino.physics.uiowa.edu(128.255.34.167):2401 failed: No
route to hos
t
This is a routing/firewall problem. the cvs command asks for
the password before trying to connect.
07:02 [EMAIL PROTECTED] ~]$ cvs -d
:pserver:[EMAIL PROTECTED]:2401/var/lib/ login
Logging in to :pserver:[EMAIL PROTECTED]:2401/var/lib
CVS password:
cvs [login aborted]: connect to [localhost]:2401 failed:
Connection refused
07:03 [EMAIL PROTECTED] ~]$
It's most probably tcpwrappers
No. That allows a connexion, then rejects it. You don't get "no
route" or "refused messages."
AFAIK tcpwrappers refuse too.
but I somehow missed the no route to.. :)
and you're right! it needs some investigation:
1. ping to the host
2. traceroute to the host.
if you sporadically get the no route problem, it means you have
... a routing problem :)
after you finished up with it, you can continue and trouble shoot.
routing problem can be cause by your university/enterprise
firewall too.
you can also investigate with tcpdump, which is a great sniffer.
Good luck!
"reset" is more probable.
--
Maxim Kovgan,
Distributed Systems and Data Mining Laboratory
Computer Science, Technion
http://dsl.cs.technion.ac.il
