[mdlug] SSH-from-laptop issues

[Jason Taylor]

Can you use other network services without issue on your laptop (e.g.
Samba, web browsing, FTP)? By SSH not working, do you not get a login?
Do you get a login but username/pass rejected? How is your firewall on
your laptop configured? Does SSH on your laptop work to other
destinations?

-Jason

On Sat, 2007-04-14 at 17:35 -0400, David Lee Lambert wrote:
> As I mentioned at the meeting today,  I've been having trouble connecting to a 
> certain computer from my laptop when I'm at my dad's house.  My laptop is a 
> Linux system running kernel 2.6.14.5, and I'm trying to connect to my system 
> at home,  Linux, running kernel 2.6.x.  My dad has a Wow! cable-modem 
> connection with a Belkin FD5231-4 hardware firewall/4-port switch between it 
> and the network.  The Linux system I'm trying to connect to is connected 
> directly to a Comcast cable-mode,  and has a domain-name provided by 
> dyndns.org.  Among other systems,  my dad has a Windows XP box with Cygwin 
> SSH and Internet Explorer.
> 
> I can log in via SSH,  and view the Apache website on my server,  from my 
> dad's Windows XP box.  I cannot do either thing from my laptop while 
> connected to my dad's network.  I can access every other website I can think 
> of (yahoo,  Wayne State, slashdot...)  
> 
> I checked the logs on the Belkin firewall,  and didn't see anything relating 
> to my laptop's IP address.  I saw something about a "SYN flood attack" from 
> an internal dynamic DHCP address (probably my sister's laptop) with a date a 
> couple weeks ago.  
> 
> I can run TCPdump on my laptop.  I don't see the traffic to/from the XP box,  
> because it's on a different port of the switch.  Here's what I see if I run 
> ssh and wait a couple of seconds:
> 
> 17:34:25.821116 IP 192.168.0.7.50009 > mail.wayne.edu.imaps: . ack 509593 win 
> 32767
> 17:34:47.419039 IP 192.168.0.7.52484 > ramoth.ssh: SWE 3649070327:3649070327
> (0) win 5840 <mss 1460,sackOK,timestamp 515388669 0,nop,wscale 2>
> 17:34:50.418878 IP 192.168.0.7.52484 > ramoth.ssh: SWE 3649070327:3649070327
> (0) win 5840 <mss 1460,sackOK,timestamp 515389419 0,nop,wscale 2>
> 
> Any ideas what's wrong? 
> 
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