The tag has no usage guidance.

learn more… | top users | synonyms

0
votes
0answers
84 views

No response on openSSL connection on client but response from client to some servers

I have a Ubuntu 14 based firewall running IP tables configured through FWBuilder. If I ssh onto the firewall and run openssl s_client -connect 176.34.155.20:443 I get a full set of responses ...
2
votes
3answers
395 views

iptable localhost connections reported to be blocked, but work ok

I am using fwbuilder and have tried setting up rules that both allow lo interface and source ip 127.0.0.1, as follows: $IPTABLES -A INPUT -i lo -m state --state NEW -j ACCEPT $IPTABLES -A OUTPUT -...
4
votes
2answers
2k views

fwbuilder: Port forwarding works from outside, but not inside

I'm hoping there's something obvious I've missed here. I have NAT rules set up to forward a few different ports to an internal machine. When a request comes in from the internet, everything works as ...
4
votes
2answers
2k views

fwbuilder: port forwarding incoming 222 port requests to a local machine 22 port

I am using fwbuilder to setup my iptables rules for a public server. The idea is to forward external requests from the 222 port to a local machine's ssh port. The settings i used are: NAT section ...
1
vote
1answer
399 views

FWBuilder DNS Object Run Time - when exactly does it resolve the DNS name?

In Firewall Builder, when you use the DNS Object and set it to run time, when exactly does the firewall (iptables in our case) actually resolve the DNS name? Is it whenever a call is made to that ...
0
votes
1answer
921 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 ...
1
vote
2answers
2k views

Firewalls: What is the difference between Policy, NAT and Routes?

I'm learning fwbuilder and firewalls in general. I don't understand the differences between Policy, NAT and Routes. They all seem like they are just ways to tell the data where to go depending on what ...