1. Cybersecurity

This may be kind of a stupid question, but here goes: Say I'm running a FreeBSD webserver (w/apache). I've managed to close ALL open ports (including SSH/telnet and portmapper), excepting '80' that apache is listening on. A netstat -a shows me nothing open. Discounting DoS/DDoS or holes in... (7 Replies)

2. UNIX for Dummies Questions & Answers

Hi all My freind has Windows 98 and behind a firewall ports used are (LAN) http:80 ftp :80 Socks :1080 I have telnet server and connected to TCP/IP i.e modem and phone line I want to let my freind Enter my linux box (telnet tunnel) i.e using port 80 and redirect it to telnet port:23... (2 Replies)

3. UNIX for Advanced & Expert Users

Hello, I would like to modify my firewall configuration for being able to handle 2 internet connections in my Red zone. I would then like to configure some selecting routing rules depending on the internal source. Actual configuration: ===================== 1 router A (ISP)... (1 Reply)

4. UNIX for Advanced & Expert Users

Hi, I am relatively new to UNIX. From the UNIX machine is there anyway of finding out to what and all other machines is the firewall open. We usually do telnet <machine_name> <port> to fidn out if the firewall is open. Is there anyway i can get an entire list. Thanks (0 Replies)

5. Cybersecurity

Could someone please settle an inter-office argument? Will your network traffic be slower through a firewall on any other port other than port 80. In other words, is port 80 faster than any other port you open on the firewall. I say no. Thanks in advance for the help! (2 Replies)

6. Shell Programming and Scripting

Hello All, Can somebody help me with this script. I have an output file with a list of servers ips and ports. I need to be able to run this script to list all the server ips in the outfile and find out if the port is open or not. #!/bin/sh IFS=#;for i in $(cat portTest); do # check... (2 Replies)

7. Shell Programming and Scripting

Dear all I am writing a shell script to use telnet for the connection test There are 3 cases to test and detail as: /* Case 1 - The port can be connected */ # telnet host_a 20101 < /dev/null 2>&1 | grep -q Connected # echo $? return 0 /* Case 2 - The port cannot be connected */ #... (1 Reply)

8. Red Hat

Hi Gurus, I need to add Multicast Port = xyz Multicast Address = 123.134.143 ( example) to my firewall rules. Can you please guide me with the lines I need to update my iptables files with. (0 Replies)

9. AIX

I'm trying to configure a firewall for AIX to accept incoming connections on ports 22 and 443 and deny everything else. All is ok; the server accepts connections only on 22 and 443, but after that I also need to accept all outgoing connections -- ssh and telnet, for example. So I started with ... (0 Replies)

10. Shell Programming and Scripting

Hi, I do a telnet to a single server using command :telnet tibserver001 9640 The output i get is : Trying 10.19.... Connected to tibserver001 However i need to put all the servers in a single file and get the output to see if the server is connected or not. #! /bin/bash telnet... (3 Replies)