Hello all ...
I have some questions about ICMP and firewalling ...
I read a old mail in which Glynn recommended to allow forwarding IMCP service 3
at least...
1. The main question is WHY ? and WHICH ones ?
2.I take my network book ...
There are 2 things .. the type and the code : 2 first bytes of the ICMP paquet
What is the service ?
Sometimes i see on the firewall this kind of things ...
195.115.167.125 > 193.252.141.221: icmp: host 195.115.167.50 unreachable
[tos :0xc0]
or [tos:0x10]...
I guess that "tos" means Type Of Service.. but i don't know to read it ...
the type, from my book is 3 to 37 ...
Can someone tell me ?
3. On the firewall, when evreything is wrong i see :
transmit timeout status 0d 0000
transmit timeout status 0d 0000
transmit timeout status 0d 0000
....
What is it and what can i do but reboot ?
4.What is the difference between "ipfwadm" and "ipchain" ?
5. Thank you in advance
Best Regards,
Vincent Schultz
----------------------------------
/// IC3W ////
[EMAIL PROTECTED]
03-Dec-98 at 11:49:38
----------------------------------
-
To unsubscribe from this list: send the line "unsubscribe linux-net" in
the body of a message to [EMAIL PROTECTED]
