ssh and port 22 problem, cont.
by Gerhard Magnus
Greetings!
I've made some progress on troubleshooting this "ssh & port 22 problem".
Here was my original post:
When I try to connect from a remote machine to my one at home
using ssh I get the error message "ssh: connect to host 64.146.133.1 port
22: Connection refused" -- but using ssh in the outgoing direction (i.e.
from home to the remote location) works fine.
Here's what's happened since:
I have two machines (PuteA and PuteB) sharing an ActionTec DSL modem. The IP
I was using was that of my "Gateway" ISP (64.146.133.1) -- an error. But
when I used the correct, static IP address of the ActionTec
(64.146.133.52) I got this message:
ssh: connect to host 64.146.133.52 port22: Connection refused
I thought I had port forwarding (for port 22) set correctly on the modem. For
troubleshooting, my ISP advised me to run "tcpdump -n host 192.168.0.2" on
PuteA, where 192.168.0.2 is the "internal" IP of PuteA. Then I logged on
to the remote location from PuteB and tried to ssh from there to PuteA
using the static IP address. The ssh from the remote location timed out
with the same "port 22: connection refused" message. The tcpdump on Pute
A gave this message:
> tcpdump: listening on eth0
> 17:27:33.662753 arp who-has 192.168.0.2 tell 192.168.0.1
where 182.168.0.1 is the "internal" IP of the modem. (Sorry if I have
this terminology wrong.)
My ISP says the problem is the firewall on PuteA and that he doesn't do linux
firewalls.
Here are my replies to the people who responded to my first post:
(1) "Do you have the firewall configured to deny incoming packets to port
22?"
How do I check this?
(2) "You need to check that sshd is running on your system."
Yes. I comes up with each boot. Also "service sshd status" gives
"sshd (pid 787) is running".
(3) "sshd uses /etc/hosts.allow and /etc/hosts.deny. Check that they are
configured to allow your remote machine in."
Both files have only commented lines.
(4) "Also, if your /etc/ssh/sshd_config file has VerifyReverseMapping
turned on, you will get kicked out if your remote address does not work
with a reverse dns lookup."
There's a "VerifyReverseMapping no" line in the file but it's been commented
out.
(5) "Just to be sure: when you are at home machine, try 'ssh localhost'.
If this works, you probably need to check your firewall."
It seems to work -- I ssh to the machine itself.
(6) "This is common on every system I have ever loaded with FC2. Your
iptables are blocking the connection. You can do one of the following:
iptables -A INPUT -m tcp -p tcp --dport 22 - j ACCEPT"
I tried this. The ssh to PuteA from the remote location still times out.
(7) "Oh yes I also took out the REDHAT firewall entrie as I dont have a
clue as to how to work with it."
I've fiddled endlessly with this "system tool" at each of the three levels
of security as well as using the "customize" option to set eth0 as a
trusted device and to allow incoming ssh. It doesn't show the settings
that actually exist.
(8) "If your fedora box is connected directly to a DSL modem, you should
be able to find your IP address by running ifconfig from the command
line and looking for 'inet addr:' (probably under 'eth0')."
eth0 Link encap:Ethernet HWaddr 00:40:05:81:60:8E
inet addr:192.168.0.4 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2184 errors:0 dropped:0 overruns:0 frame:0
TX packets:2005 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:1122075 (1.0 Mb) TX bytes:190214 (185.7 Kb)
Interrupt:5 Base address:0x3000
Could this be the problem -- the "inet addr" of 192.168.0.4? As far as I
can tell, the modem is 192.168.0.1, PuteA is 192.168.0.2, and PuteB is
192.168.0.3. I haven't set anything as 192.168.0.4.
(9) "nmap 64.146.133.52"
(The 1598 ports scanned but not shown below are in state: closed)
Port State Service
23/tcp open telnet
53/tcp open domain
80/tcp open http
Shouldn't ssh be here? And what's telnet doing open? The books have me
scared to death of this... hackers, crackers, script kiddies, etc.
Thanks for the help!
Jerry Magnus
16 years, 1 month
Can scp be used to update a directory?
by Anne Wilson
The scp man page is not very verbose ;-) I want to copy a directory,
recursively, over the lan, but only those files that are new or updated.
MS-DOS could do this back in ...Ummm.... so I can't believe it can't be done
in scp, but I can't see how to do it.
Anne
16 years, 2 months
eth0 dont start at bootime
by Wolfgang Morawetz
Hi,
each time i boot fedora i must enable by hand the eth0 device (by the
gui congig-tool).
What must i do to enable the device at boot?
# cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=bugs.acme
# cat /etc/sysconfig/networking/devices/ifcfg-eth0
# cat /etc/sysconfig/networking/profiles/default/ifcfg-eth0
# cat /etc/sysconfig/network-scripts/ifcfg-eth0
all 3 the same output
# Macronix, Inc. [MXIC]|MX987x5
DEVICE=eth0
BOOTPROTO=dhcp
HWADDR=00:50:BF:76:39:8F
ONBOOT=yes
TYPE=Ethernet
DHCP_HOSTNAME=bugs.acme
USERCTL=no
PEERDNS=no
Thx
Wolfgang
alias wfx (http://teg.sf.net)
16 years, 3 months
Yum on x86_64
by Gareth Bult
Hi,
I seem to have (finally :) ) acquired a complete(ish) / working x86_64
system .. but I'm still having trouble with a few bits, not least "yum".
I get;
Server: Fedora Core 1 - i386 - Base
Server: Fedora Core 1 - i386 - Released Updates
Server: Fedora Core 1 - i386 - Unreleased Updates
Finding updated packages
Traceback (most recent call last):
File "/usr/bin/yum", line 60, in ?
yummain.main(sys.argv[1:])
File "yummain.py", line 204, in main
File "clientStuff.py", line 363, in getupdatedhdrlist
File "clientStuff.py", line 409, in bestversion
IndexError: list index out of range
[root@squizzey oddjob]#
(This is a modified system [2.6.0-test11] however it seems to run well)
Pointing it at mozilla's channel for SeaMonkey seems to work if I
disable the default channels, however...
Anyone any ideas ?
(I was sort of expecting to see it say "no x86_64 updates supported yet"
as opposed to a complete crash)
Also, can yum pull SRPMS and rebuild them ?
tia
Gareth.
16 years, 3 months
Thunderbird and Snapshot
by Paul Lemmons
I am almost certain I have done this before but I am getting old and may
be imagining things. I have opened up a new message in Thunderbird
(latest and greatest). I have verified that the format is "Rich Text
(HTML)". I go to KSnapShot and snap a section of the screen and click on
the "Copy to Clipboard" button. I then try to paste it into the note and
it simply does nothing.
Am I missing something? I would like to paste an image into a note to
send as documentation to someone.
--
Murphy Says:
Real programmers don't eat muffins
16 years, 4 months
Python, RPM error
by Austin Isler
I apologize if this is in the archives, and I missed it.
I updated rpm a while back with:
# yum -y update rpm
I believe it installed a python2.4 package as well. Ever since then, I
have had problems with python and rpm. I get this error when trying to
use yum:
Traceback (most recent call last):
File "/usr/bin/yum", line 6, in ?
import yummain
File "/usr/share/yum-cli/yummain.py", line 23, in ?
import yum
File "/usr/lib/python2.3/site-packages/yum/__init__.py", line 21, in ?
import rpm
ImportError: No module named rpm
Appreciate the help,
Austin
16 years, 8 months
firefox bookmarks
by Richard E Miles
Is it possible to save the firefox bookmarks so that when I do a clean install
of FC4 I can reload them?
I tried to cp the bookmarks.html file back into the /home/rmiles/.mozilla/firefox/0qem39dn.default directory but it did not
restore them from an earlier saving of this file.
It would be nice to be able to reset the bookmarks that I had in FC 3 to the FC 4
firefox.
--
Richard E Miles
Federal Way WA. USA
registered linux user 46097
16 years, 9 months
Anyone know what this means?
by Adam Hough
I get this from dmesg running FC5 2.6.18-1.2200.fc5smp. The machine
seems to be stable (was crashing very frequently before this kernel in
FC). Also yes I know to boot with noapci as a kernel parameter to most
likely get rid of this error. I am still curious as to what it means.
ACPI Exception (acpi_processor-0681): AE_NOT_FOUND, Processor Device is
not present [20060707]
ACPI: Getting cpuindex for acpiid 0x2
ACPI Exception (acpi_processor-0681): AE_NOT_FOUND, Processor Device is
not present [20060707]
ACPI: Getting cpuindex for acpiid 0x3
Also hyperthreading is disabled in the bios as the machine refuses to
boot if it is enabled with this kernel and all previous FC5 kernels
panic on this machine. Memory is fine also no errors after ~90 hours of
memtest86+. The motherboard and processors are new also.
--
Adam Hough
High Performance Computing
ahough(a)lsu.edu
16 years, 11 months
Cursor problem
by Астахов Петр
Hello!
I bought motherboard Gigabyte GA-K8N51PVMT-9 on chipset GeForce 6150 and
installed FC5. I can't see cursor in X. When computer loading, and rhgb
show the progress of loading, I see cursor and everything OK. When
computer is loaded and X started, there is no viewable cursor on the
screen. I move mouse, all necessary menus etc are highlighted, but no
cursor. I update kernel and xorg - result the same. I installed nvidia
drivers for video from livna - but result the same - no cursor.
What shall I do?
With best regard, Peter (Zebar) Astakhov
16 years, 11 months
