Re: ssh - cannot log in

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On 6/27/07, David Katz <david@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
I'm using Putty under XP to try to login to FC6 but it times out.

I can ping the external ip from my laptop.

Here's my iptables --list:

Chain INPUT (policy ACCEPT)
target     prot opt source               destination
RH-Firewall-1-INPUT  all  --  anywhere             anywhere

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination
RH-Firewall-1-INPUT  all  --  anywhere             anywhere

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

Chain RH-Firewall-1-INPUT (2 references)
target     prot opt source               destination
ACCEPT     all  --  anywhere             anywhere
ACCEPT     icmp --  anywhere             anywhere            icmp any
ACCEPT     tcp  --  anywhere             anywhere            tcp
dpt:http flags:SYN,RST,ACK/SYN
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:ssh
flags:SYN,RST,ACK/SYN
ACCEPT     esp  --  anywhere             anywhere
ACCEPT     ah   --  anywhere             anywhere
ACCEPT     udp  --  anywhere             224.0.0.251         udp dpt:mdns
ACCEPT     udp  --  anywhere             anywhere            udp dpt:ipp
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:ipp
ACCEPT     all  --  anywhere             anywhere            state
RELATED,ESTABLISHED
ACCEPT     tcp  --  anywhere             anywhere            state NEW
tcp dpt:xdmcp
ACCEPT     udp  --  anywhere             anywhere            state NEW
udp dpt:xdmcp
ACCEPT     tcp  --  anywhere             anywhere            state NEW
tcp dpt:x11
ACCEPT     tcp  --  anywhere             anywhere            state NEW
tcp dpt:x11-ssh-offset
ACCEPT     tcp  --  anywhere             anywhere            state NEW
tcp dpt:ssh
REJECT     all  --  anywhere             anywhere            reject-with
icmp-host-prohibited

I've tried without the windows firewall. The router is open to port 22
and nats over to what I think is my workstation (how can I check this?)

Thanks for any help.

Note - ultimately I'd like to use X but right now I'm just trying to get
a login prompt.




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Sounds like your router isn't forwarding port 22 traffic to your box
from what you are describing.  Check the settings on your router to
see what IP it forwards port 22 traffic, and make sure your
workstation has that IP (ifconfig command).  You'll want to either
statically set your IP on that workstation, or set up a static DHCP
entry for the MAC of your workstation so it always gets the same IP.
Otherwise your port forwarding destination IP will be a moving target.

Having said all that, are you certain you are trying to connect to the
proper public IP for your router?  Have you checked what public IP is
allocated to your router? Here again that is a moving target unless
you have a static IP (very unlikely for a home user).  So you may be
trying to connect to an IP that is now allocated to someone else.
Hence why the ping would respond but SSH would not work.

If that is the case, you'll need to use a service such as DynDNS and
enable that feature on your router (providing it supports it).

Jacques B.

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