Sponsored Content
Full Discussion: problem opening TCP ports
Special Forums IP Networking problem opening TCP ports Post 302190669 by thehaapyappy on Wednesday 30th of April 2008 07:25:07 AM
Old 04-30-2008
I've been able to access the filewall file and the results by going to vi /etc/sysconfig/firewall

This will make the rules persistent across reboots. You can see the general commands to open ports up if you search for the appropriately commented areas.are:
Code:
#!/bin/sh

#fix for passive ftp connection tracking
/sbin/modprobe ip_conntrack_ftp

# Drop ICMP echo request messages sent to multicast or broadcast addresses
echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts

# Drop source routed packets
echo 0 > /proc/sys/net/ipv4/conf/all/accept_source_route

# Enable TCP SYS cookie (DoS) protection
echo 1 > /proc/sys/net/ipv4/tcp_syncookies

# Don't accept ICMP redirect messages
echo 0 > /proc/sys/net/ipv4/conf/all/accept_redirects

# Don't send ICMP redirect messages
echo 0 > /proc/sys/net/ipv4/conf/all/send_redirects

# Enable source address spoofing protection
echo 1 > /proc/sys/net/ipv4/conf/all/rp_filter

"/etc/sysconfig/firewall" 88L, 3244C

does that mean anything?
 

10 More Discussions You Might Find Interesting

1. IP Networking

TCP Ports

We are being setup with a client over their VPN to support them remotely. We are unable to access their VPN through our server, they said to look and make sure that the TCP ports are enabled for their security setup (ports are in the 4000 range). How do you look for this and how do you enable a... (3 Replies)
Discussion started by: blacksheep
3 Replies

2. Cybersecurity

opening ports

I need to open a port in linux to allow a connect() from another box to succeed. I have the linux box listening on port 3000 on INADDR_ANY, and a Windows box does a connect to the IP of the linux box on that same port. The Linux box refuses the connection. I think it's because all the ports are... (9 Replies)
Discussion started by: dryheat
9 Replies

3. UNIX for Dummies Questions & Answers

TCP Listening Ports

Hello all, Can someone instruct me on how to change the listening port for ftp ( or any tcp service) from 21 to another port number? Thanks in advance.. -AJ (3 Replies)
Discussion started by: jacobsa
3 Replies

4. UNIX for Dummies Questions & Answers

TCP/UDP Ports

Just starting to work with unix, wondering if there is any good on-line documentation explaining TCP/UDP ports, how to use them, etc... Thanks.... (1 Reply)
Discussion started by: eugene_mayo
1 Replies

5. IP Networking

TCP/UDP Ports

Just wondering if anyone knows of any good on-line documentation on TCP/UDP Ports. Basically i want to know how to check if they are in use, learn how to close them, etc... Thanks... (5 Replies)
Discussion started by: eugene_mayo
5 Replies

6. UNIX for Advanced & Expert Users

TCP ports - TIME_WAIT

What is the maximum number of TCP ports that can be consumed at any one time? How can I determine what the number is or increase it? I was under the impression that with our system (UnixWare 7.1.1) 1024 was the maximum under our current Kernel tuning parms, but I think that is really just... (4 Replies)
Discussion started by: dlkox
4 Replies

7. Windows & DOS: Issues & Discussions

TCP ports and file sharing

In using a music file sharing program (WinMx), I am told that I cannot make a primary connection (fastest downloads) because I do not have a TCP and UDP port. I am running Windows Me.What do I do? Thanks. (6 Replies)
Discussion started by: dookster5
6 Replies

8. AIX

Opening ports

Hi guys, I need to open ports on my AIX machine. The only way I know is to use service name to disable or enable ports which are used by the services. I found in /etc/services that the ports are unidentified. Btw, I want to open port number 11576 and 11577. Need help on this one. Thanks! :) (1 Reply)
Discussion started by: raskita
1 Replies

9. UNIX for Advanced & Expert Users

TCP slow access though certain ports

hi, I'm currently running with an issue whereby we are experiencing very poor access speeds to our Informix database. Connections or requests to the DB are taking in excess of 2/3/4 minutes during peek periods during the day. This has only just started to happen but so far we have been unable to... (0 Replies)
Discussion started by: fastyan
0 Replies

10. UNIX for Dummies Questions & Answers

Opening TCP ports

I'm not sure if this is the right place for this post, but I'd be grateful if somebody could please help me. I'm trying to open ports 999, 1982 and 1983 but am not having much luck. I used iptables -A INPUT -i eth0 -p tcp --sport 999 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A INPUT -i... (2 Replies)
Discussion started by: thehaapyappy
2 Replies
All times are GMT -4. The time now is 08:33 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy