0
votes
1answer
66 views

iptables blocks ip address even though it is specified to allow it. Why? [closed]

I'm at a loss to explain why these rules don't have the same effect as whitelisting ip addresses. Can anyone tell me why? # /etc/hosts.deny ...
0
votes
1answer
63 views

Firewall issue for port 25 on Fedora FC15

I am trying to test/set up my mail server. I am currently running into an issue when trying to telnet into my server on port 25. Here is netstat output for port 25 # netstat -plnt | grep :25 tcp ...
-1
votes
1answer
41 views

Cannot connect to fedora via ssh (iptables) [closed]

I recently ssh-ed into my fedora machine at work. I ran the command: systemctl start iptables.service Now I can't ssh back into the machine. So far ssh has been my only way to access the machine. ...
0
votes
1answer
141 views

How to Setup Linux Server As A Router with NAT

We have a simple router which has NAT of symmetric type, but because this router doesn't provide us with any debugging interface, we cannot figure out if a specific packet reaches the NAT or not. ...
-1
votes
1answer
337 views

I can't access my computer through specific port

On Fedora 18 I tried to access port 1521, so I opened the following port on my firewall: $ sudo iptables -I INPUT -i eth0 -p tcp -m tcp --dport 1521 -j ACCEPT $ sudo service iptables save and $ ...
6
votes
1answer
9k views

How to enable iptables (instead of firewalld) services on RHEL 7 and Fedora 18?

The newest fedora has firewalld as new firewall aplication. I liked old iptables services. I want them back but have no idea how to do that. I have tried : systemctl disable firewalld.service ...
1
vote
1answer
174 views

Linux ( Fedora 15 ) multiple ISP and NAT routing

So I have my system running Fedora 15 and currently with a DSL line. The line provides a static IP along with static route, DNS. I run a web/E-Mail/DNS server from this IP. It also supports a NAT'd ...
1
vote
0answers
178 views

Host name change breaking http? Fedora

OK so I have been messing around on my development server. It has been a while since I have had my head in linux and I suspect I have broken something. I have SSH running and that is working fine. I ...
0
votes
1answer
81 views

APF, IPTABLES, Fedora 15 - Not blocking correctly

I just got a new remote server which came with Fedora 15. I first tried to run APF but it gave me this error "apf(18031): {glob} unable to load iptables module (ip_tables), aborting.". Which I then ...
3
votes
1answer
2k views

Fedora 17 not saving iptables

For some reason my Fedora is not saving changes made to my iptables. iptables -I INPUT -p tcp --dport 80 -j ACCEPT iptables -I INPUT -p tcp --dport 443 -j ACCEPT service iptables status service ...
0
votes
2answers
394 views

Can't open/forward port with Fedora15

I've got a server running Fedora 15. My end goal is to be able to forward any protocol over random port numbers (specified via iptables rules.) Let's say, for the time being, I want to forward port ...
0
votes
1answer
825 views

Difference between RH-Firewall-1-INPUT and INPUT

I'm new to setting up servers and when I'm trying to follow a guide for doing iptables. The guide says to use RH-Firewall-1-INPUT while i see the original configuration just using INPUT. I'm wondering ...
1
vote
1answer
659 views

IP Packet Capture/Manipulation via TUN/TAP

I'm trying to capture and manipulate incoming IP packets (via eth0 interface) by using a TUN device (since I'm only concerned with IP layer). The first step I think is 1:1 packet forwarding from eth0 ...
0
votes
1answer
211 views

IPTables port whitelist, problem with outgoing connections

I'm trying to set-up iptables so it will only allow incoming connections on ports I specify. I managed to get it working however it seems I somehow managed to break outgoing connections in the ...
1
vote
1answer
610 views

Fedora Core 13 and VSFTPD issues

I am running Fedora Core 13 and I have vsftpd (vsftpd-2.2.2-7.fc13.x86_64) up and running, and I can login, but it keeps hanging: $ ftp xxx.local Connected to xxx.local. 220 (vsFTPd 2.2.2) Name ...
0
votes
1answer
568 views

Implementing QoS on a gateway box that runs Fedora [closed]

I configured a small factor PC to run as my gateway/file server/backup server/etc for my apartment. I want to implement QoS based on source IP address to prevent my roommates from bogging down my ...
0
votes
1answer
220 views

Iptables state tracking

I've just taken over administration of a fairly complex firewall ruleset for a firewall box running Fedora Core 12, and there's one thing about it that is puzzling me. When I run nmap on the gateway ...
0
votes
1answer
823 views

fwbuilder/iptables manually scripted + autogenerated rules at startup?

Fedora 11 Our previous IT-guy setup iptable rules on our firewall in a way that is confusing me and he didn't document any of it. I was hoping someone could help me make some sense of it. The ...
0
votes
4answers
429 views

iptables port forwarding

I have a linksys router that is letting traffic through just fine, but when I try to let that same traffic through to my linux box (fedora 10) it stalls. I've followed every iptable rule I can find ...
10
votes
5answers
762 views

Managing iptables rules in Linux

I have a lot of rules for my iptables setup (routing, ssh bans etc) I also picked up a list of IP's to ban from here http://blacklist.linuxadmin.org and now its getting really complicated. My ...