While analyzing some traffic logs, I noticed a node pinging its gateway with a large ping packet size, ranging from 700 bytes to 1 MB. It's a constant ping from node to gateway and the size per ping is rather high. Does anyone know why this might be happening or if there is a benefit (possibly for testing purposes) to manipulating the PING size?
I am confused with the size of packet icmp. I just did a simple initial netstat, where
for eth0 : TX-OK = 485
after 1 ping message is send, again I see in netstat TX-OK = 488
So, I just want to know how does the TX actually intepret the icmp packet is counted?
I thought with 1 ping , then the TX-OK will be 486?
*edit : 1 PING is 64 bytes. so howcome number of pacet in TX differs only 3 ?
I'm really new to networking and linux system. So please help me in this:
- I have my phone acted as the wireless access point, and other devices like all my LAPTOPs connected to it to create a LAN network. How can I use iptables to block (for example ping request, reply) from host to host.
P/s: I also try to block forward chain using
iptables -A FORWARD -j DROP
But it doesn't work.
I have Ubuntu 14.04 installed and I recently installed the same version from the same CD on my friend's computer. When I try to ping him I don't get any response, when I press Ctrl C to terminate ping it says it sent some number of packets, but none of them were received, 100% packet loss. I thought he might have a firewall installed, but that's unlikely because I just installed his Ubuntu.
Here is what I am trying to accomplish.
I have two servers, the first one (server A) is always up and the other (server B) only when needed.
The goal is to trigger an action on server A after receiving a specific echo packet from server B:
1) server B comes online
2_a) server B sends a specific ping packet (with a modified size and/or content) to server A
2_b) server A is listening for
while analyzing some traffic logs, I noticed a node pinging it's gateway(GW) with a large PING size = 700bytes ~ 1MB. It's a constant PING from node to GW and the size per PING is rather high. Anyone know why this might be happening or if there is a benefit (possibly for testing purposes) to manipulating the PING size?