Can surf net and ping others but can't be pinged

atatsch · n00b Joined: 24 Jan 2005 Posts: 14

First of all thanks to all the people in the forum posting on madwifi and the D-link DWL-G520 card. I bought one yesterday and emerged madwifi and BAM writing this post on that connection.

No my problem is I can surf the internet and ping other computers on my network but I cannot ping this computer from others on the network. I read over the forum about this and everyone is talking about IPtables. I am not using iptables so that didn't really help. It has to be some config problem not letting this machine get accessed from the outside, but I am to much of a newb to know how to fix it. Any help on this would be super.

Also, should I be using IPtables?
:oops:

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Johnyp · Guru Joined: 23 Mar 2005 Posts: 301

IP tables and Netfilter are kernel features that can be used to build a kernel based firewall.

You should be using it if you are connecting to a web directly or run servers (web,ftp,ssh)

If you can't be pinged, but otherwise have full communications to the outside means that something is dropping ICMP packets. And in most cases this is done by a firewall.
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atatsch · n00b Joined: 24 Jan 2005 Posts: 14

I am going to implement IPtables based on your advice. :wink:

Just to see if I could be pinged I set up a simple rule:

mekong · Posted: Tue Apr 19, 2005 3:52 pm Post subject:

Did you disable icmp echo on sysctl? Another possibility is your ISP router filter the incoming icmp echo.

atatsch · n00b Joined: 24 Jan 2005 Posts: 14

Thanks for helping a newb with this. As it turns out it is the ISP that is filtering out the ICMP stuff. Nevertheless this has been educational and I am going get into IPtables. Thanks again. :lol:

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I am a lightning rod for the forces of chaos.