02-22-2011
Check if your firewall blocks incomming ICMPs
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
hi All
my Redhat Linux server stopped responding to pings all together. and am also not able to ping out of the box. There are however no issues with internet connectivity and my application is working fine. When I tried to ping another machine (Win98) i could see the pings coming from my... (2 Replies)
Discussion started by: skotapal
2 Replies
2. AIX
Hey all. I have a long list of IP addresses I want to ping. The IP's are located in a flat file "ping_info.dat".
I was wondering what the best way to go about this would be. Can someone help me out? (2 Replies)
Discussion started by: jalge2
2 Replies
3. Shell Programming and Scripting
Hi,
How to ping an ip from an unix machine. Can you please let me know the exact command. I used and i got the below error
ping 171.18.17.2
bash: ping: command not found
Thanks n regards
Ammu (1 Reply)
Discussion started by: ammu
1 Replies
4. UNIX for Advanced & Expert Users
Hello,
We have boxes on a WAN network I guess you would call it, pretty much they are hooked up via DSL in different locations in the US and we connect to them via SSH for a secure connection. Some of the boxes won't return a ping request like they are down, I am guessing is because the router... (5 Replies)
Discussion started by: benefactr
5 Replies
5. Shell Programming and Scripting
Keep in mind that I haven't done Perl scripting for a LONG time, so I'm quite rusty.
This is what I would like to do:
- using fork, create 3 or 4 processes to read 3 or 4 different text documents containing server names or IP addresses
- in each of those processes, Perl will ping each of those... (7 Replies)
Discussion started by: kooshi
7 Replies
6. Shell Programming and Scripting
how can you ping a domain and store the ip?
like given a url in a variable $url
how can i ping it?
also how can i find the local server's ip address on a cpanel server?
(i have multiple servers and didnt want to hard code it in)
(basically i want to check the domain accounts on the server,... (11 Replies)
Discussion started by: vanessafan99
11 Replies
7. IP Networking
Hi,
I have a rather strange IP question...
Here's my problem:
I have a Linux box (call it "turing") with 2 NICs.
One network interface (eth0) has an IP assigned, say 192.168.42.50.
The other interface (eth1) is up, but has no IP yet.
My question: is it possible to determine from... (3 Replies)
Discussion started by: NH2
3 Replies
8. UNIX Desktop Questions & Answers
I need to ping websites and I need to see which one has the highest delay.
My problem is I need to extract the name Facebook and the time=74.0 ms using awk. I need help doing this please...
PING facebook.com (173.252.90.36) 56(84) bytes of data.
64 bytes from... (5 Replies)
Discussion started by: 5sku5
5 Replies
9. Emergency UNIX and Linux Support
Hi,
I need to set up a script that would write the results of the ping command from one AIX server to another file may be every minute. Like this I need to gather the data for a period of 24 hours.
Can someone please help me with this?
G (5 Replies)
Discussion started by: ggayathri
5 Replies
10. Shell Programming and Scripting
Hello folks;
I'm trying to write a shell script to ping 5 hosts i have once every 1 hour and if it receives any failure from any of those hosts, it sends an email alert with the results from this failing ping.
Any help would be greatly appreciated (1 Reply)
Discussion started by: Katkota
1 Replies
APF(1) General Commands Manual APF(1)
NAME
apf - easy iptables based firewall system
SYNOPSIS
apf
DESCRIPTION
This manual page documents briefly the apf command. This manual page was written for the Debian distribution because the original program
does not have a manual page.
Advanced Policy Firewall (APF) is an iptables (netfilter) based firewall system designed around the essential needs of today's Internet
deployed servers and the unique needs of custom deployed Linux installations. The configuration of APF is designed to be very informative
and present the user with an easy to follow process, from top to bottom of the configuration file. The management of APF on a day-to-day
basis is conducted from the command line with the 'apf' command, which includes detailed usage information and all the features one would
expect from a current and forward thinking firewall solution.
OPTIONS
apf follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included below.
-s|--start
load all firewall rules
-r|--restart
stop (flush) & reload firewall rules
-l|--list
list all firewall rules
-t|--status
output firewall status log
-e|--refresh
refresh & resolve dns names in trust rules
-a <HOST CMT|--allow <HOST COMMENT>
add host (IP/FQDN) to allow_hosts.rules and immediately load new rule into firewall
-d <HOST CMT|--deny <HOST COMMENT>
add host (IP/FQDN) to deny_hosts.rules and immediately load new rule into firewall
-u <HOST>|--remove <HOST>
remove host from [glob]*_hosts.rules and immediately remove rule from firewall
-o|--ovars
output all configuration options
COPYRIGHT
Copyright (C) 1999-2007, R-fx Networks <proj@r-fx.org>
Copyright (C) 2007, Ryan MacDonald <ryan@r-fx.org> This program may be freely redistributed under the terms of the GNU GPL
This manual page was written by Giuseppe Iuculano <giuseppe@iuculano.it>, for the Debian project (but may be used by others).
August 17, 2008 APF(1)