firewalld-users October 2017

firewalld-users@lists.fedorahosted.org

2 discussions

Firewalld & IPv6
by Paavo Leinonen 04 Jun '18

04 Jun '18

Hi, I'm running firewalld in a router that connects the devices in my home LAN to internet. I have recently added IPv6 DHCPv6 config to the router, and prefix delegation works, so the devices in my home LAN get proper IPv6 addresses. However, I don't like the idea that all IPv6 enabled devices in my home LAN have public IPv6 addresses. I'd very much prefer simple IPv4 -style NAT approach to protect the devices in home LAN from being accessed from the internet. How do I implement something like this with firewalld in the router? wanif=eth0 lanif=eth1 ip6tables -A FORWARD -m state --state NEW -i $lanif -o $wanif -j ACCEPT ip6tables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT ip6tables -P FORWARD DROP Other ways to protect the devices in my home LAN being accessed from the internet? -Paavo

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Re: firewalld and ipsets
by John Griffiths 19 Dec '17

19 Dec '17

I implemented the use of ipsets for a direct rule in firewalld in 2013. The direct.xml is: <?xml version="1.0" encoding="utf-8"?> <direct>  <chain ipv="ipv4" table="raw" chain="PREROUTING_blacklist"/> <passthrough ipv="ipv4">-t raw -A PREROUTING_blacklist -m limit --limit 3/min -j LOG --log-prefix BLACKLIST_DROP: --log-level 6</passthrough> <passthrough ipv="ipv4">-t raw -A PREROUTING_blacklist -j DROP</passthrough> <passthrough ipv="ipv4">-t raw -A PREROUTING -m set --match-set blacklist src -j PREROUTING_blacklist</passthrough> <chain ipv="ipv6" table="raw" chain="PREROUTING_blacklist"/> <passthrough ipv="ipv6">-t raw -A PREROUTING_blacklist -m limit --limit 3/min -j LOG --log-prefix BLACKLIST_DROP: --log-level 6</passthrough> <passthrough ipv="ipv6">-t raw -A PREROUTING_blacklist -j DROP</passthrough> <passthrough ipv="ipv6">-t raw -A PREROUTING -m set --match-set blacklist src -j PREROUTING_blacklist</passthrough> </direct> I have several ipsets that are modified outside of firewalld. blacklist_ipv4_permanent blacklist_ipv4_semipermanent blacklist_ipv4_current blacklist_ipv6_permanent blacklist_ipv6_semipermanent blacklist_ipv6_current These are members of ipset blacklist: Name: blacklist Type: list:set Revision: 3 Header: size 8 Size in memory: 368 References: 0 Number of entries: 6 Members: blacklist_ipv4_permanent blacklist_ipv4_semipermanent blacklist_ipv4_current blacklist_ipv6_permanent blacklist_ipv6_semipermanent blacklist_ipv6_current This was working until I upgraded to Fedora 26 from Fedora 24. Now, even though an IP is in one of the member iplists, blacklist_ipv4_semipermanent or one of the others, firewalld does not block the IP. I do not know if this is an issue with ipsets or firewalld, nor do I know whether this is a "feature" or a bug. Since these ipsets are modified dynamically and need to be accessed from bash scripts, using the internal ipset functionality of firewalld is not my desired choice. Any insight or help in getting the ipsets working again with firewalld would be greatly appreciated. Thanks. John

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firewalld-users October 2017