I upgraded my server to Fedora 32. Firewalld has switched the backend to Nftables.
My setup is pretty simple. Just HTTP, HTTPS, SSH, SMTP ports open and multiple IPsets (IPv4, IPv6) to block a preset list of IP addresses. Earlier I used to do everything in Iptables with Ipsets but right now I'm trying to upgrade my setup to Nftables and I'm using Firewalld for this.
$ firewall-cmd --zone=public --permanent --add-service=ssh
$ firewall-cmd --zone=public --permanent --add-service=http
$ firewall-cmd --zone=public --permanent --add-service=https
$ firewall-cmd --zone=public --permanent --add-service=smtp
###
Till here things are fine. firewall-cmd --reload works perfectly.
###
$ firewall-cmd --permanent --new-ipset=blacklist --type=hash:net --option=family=inet
$ firewall-cmd --permanent --new-ipset=blacklist6 --type=hash:net --option=family=inet6
$ firewall-cmd --permanent --zone=drop --add-source=ipset:blacklist
$ firewall-cmd --permanent --zone=drop --add-source=ipset:blacklist6
$ firewall-cmd --permanent --ipset=blacklist --add-entries-from-file=blacklist.txt
$ firewall-cmd --permanent --ipset=blacklist6 --add-entries-from-file=blacklist6.txt
The moment I run firewall-cmd --reload I see the below error and all the traffic to my server gets blocked except SSH, which is already established. New SSH connection is also blocked.
$ firewall-cmd --reload
Error: COMMAND_FAILED: 'python-nftables' failed: internal:0:0-0: Error: No such file or directory
internal:0:0-0: Error: No such file or directory
internal:0:0-0: Error: No such file or directory
internal:0:0-0: Error: No such file or directory
internal:0:0-0: Error: No such file or directory
internal:0:0-0: Error: No such file or directory
internal:0:0-0: Error: No such file or directory
internal:0:0-0: Error: No such file or directory
internal:0:0-0: Error: No such file or directory
JSON blob:
{"nftables": [{"metainfo": {"json_schema_version": 1}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_public"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_public_pre"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_public_log"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_public_deny"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_public_allow"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_IN_public_post"}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_public", "expr": [{"jump": {"target": "filter_IN_public_pre"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_public", "expr": [{"jump": {"target": "filter_IN_public_log"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_public", "expr": [{"jump": {"target": "filter_IN_public_deny"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_public", "expr": [{"jump": {"target": "filter_IN_public_allow"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_public", "expr": [{"jump": {"target": "filter_IN_public_post"}}]}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_public"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_public_pre"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_public_log"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_public_deny"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_public_allow"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDI_public_post"}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_public", "expr": [{"jump": {"target": "filter_FWDI_public_pre"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_public", "expr": [{"jump": {"target": "filter_FWDI_public_log"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_public", "expr": [{"jump": {"target": "filter_FWDI_public_deny"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_public", "expr": [{"jump": {"target": "filter_FWDI_public_allow"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_public", "expr": [{"jump": {"target": "filter_FWDI_public_post"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_IN_public", "index": 4, "expr": [{"match": {"left": {"meta": {"key": "l4proto"}}, "op": "==", "right": {"set": ["icmp", "icmpv6"]}}}, {"accept": null}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDI_public", "index": 4, "expr": [{"match": {"left": {"meta": {"key": "l4proto"}}, "op": "==", "right": {"set": ["icmp", "icmpv6"]}}}, {"accept": null}]}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_public"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_public_pre"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_public_log"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_public_deny"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_public_allow"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "raw_PRE_public_post"}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PRE_public", "expr": [{"jump": {"target": "raw_PRE_public_pre"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PRE_public", "expr": [{"jump": {"target": "raw_PRE_public_log"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PRE_public", "expr": [{"jump": {"target": "raw_PRE_public_deny"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PRE_public", "expr": [{"jump": {"target": "raw_PRE_public_allow"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PRE_public", "expr": [{"jump": {"target": "raw_PRE_public_post"}}]}}}, {"insert": {"rule": {"family": "inet", "table": "firewalld", "chain": "raw_PREROUTING_ZONES", "expr": [{"match": {"left": {"meta": {"key": "iifname"}}, "op": "==", "right": "eth0"}}, {"goto": {"target": "raw_PRE_public"}}]}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "mangle_PRE_public"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "mangle_PRE_public_pre"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "mangle_PRE_public_log"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "mangle_PRE_public_deny"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "mangle_PRE_public_allow"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "mangle_PRE_public_post"}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "mangle_PRE_public", "expr": [{"jump": {"target": "mangle_PRE_public_pre"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "mangle_PRE_public", "expr": [{"jump": {"target": "mangle_PRE_public_log"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "mangle_PRE_public", "expr": [{"jump": {"target": "mangle_PRE_public_deny"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "mangle_PRE_public", "expr": [{"jump": {"target": "mangle_PRE_public_allow"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "mangle_PRE_public", "expr": [{"jump": {"target": "mangle_PRE_public_post"}}]}}}, {"insert": {"rule": {"family": "inet", "table": "firewalld", "chain": "mangle_PREROUTING_ZONES", "expr": [{"match": {"left": {"meta": {"key": "iifname"}}, "op": "==", "right": "eth0"}}, {"goto": {"target": "mangle_PRE_public"}}]}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_PRE_public"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_PRE_public_pre"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_PRE_public_log"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_PRE_public_deny"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_PRE_public_allow"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_PRE_public_post"}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_PRE_public", "expr": [{"jump": {"target": "nat_PRE_public_pre"}}]}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_PRE_public", "expr": [{"jump": {"target": "nat_PRE_public_log"}}]}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_PRE_public", "expr": [{"jump": {"target": "nat_PRE_public_deny"}}]}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_PRE_public", "expr": [{"jump": {"target": "nat_PRE_public_allow"}}]}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_PRE_public", "expr": [{"jump": {"target": "nat_PRE_public_post"}}]}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_PRE_public"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_PRE_public_pre"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_PRE_public_log"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_PRE_public_deny"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_PRE_public_allow"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_PRE_public_post"}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_PRE_public", "expr": [{"jump": {"target": "nat_PRE_public_pre"}}]}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_PRE_public", "expr": [{"jump": {"target": "nat_PRE_public_log"}}]}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_PRE_public", "expr": [{"jump": {"target": "nat_PRE_public_deny"}}]}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_PRE_public", "expr": [{"jump": {"target": "nat_PRE_public_allow"}}]}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_PRE_public", "expr": [{"jump": {"target": "nat_PRE_public_post"}}]}}}, {"insert": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_PREROUTING_ZONES", "expr": [{"match": {"left": {"meta": {"key": "iifname"}}, "op": "==", "right": "eth0"}}, {"goto": {"target": "nat_PRE_public"}}]}}}, {"insert": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_PREROUTING_ZONES", "expr": [{"match": {"left": {"meta": {"key": "iifname"}}, "op": "==", "right": "eth0"}}, {"goto": {"target": "nat_PRE_public"}}]}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_POST_public"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_POST_public_pre"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_POST_public_log"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_POST_public_deny"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_POST_public_allow"}}}, {"add": {"chain": {"family": "ip", "table": "firewalld", "name": "nat_POST_public_post"}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_POST_public", "expr": [{"jump": {"target": "nat_POST_public_pre"}}]}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_POST_public", "expr": [{"jump": {"target": "nat_POST_public_log"}}]}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_POST_public", "expr": [{"jump": {"target": "nat_POST_public_deny"}}]}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_POST_public", "expr": [{"jump": {"target": "nat_POST_public_allow"}}]}}}, {"add": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_POST_public", "expr": [{"jump": {"target": "nat_POST_public_post"}}]}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_POST_public"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_POST_public_pre"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_POST_public_log"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_POST_public_deny"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_POST_public_allow"}}}, {"add": {"chain": {"family": "ip6", "table": "firewalld", "name": "nat_POST_public_post"}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_POST_public", "expr": [{"jump": {"target": "nat_POST_public_pre"}}]}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_POST_public", "expr": [{"jump": {"target": "nat_POST_public_log"}}]}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_POST_public", "expr": [{"jump": {"target": "nat_POST_public_deny"}}]}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_POST_public", "expr": [{"jump": {"target": "nat_POST_public_allow"}}]}}}, {"add": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_POST_public", "expr": [{"jump": {"target": "nat_POST_public_post"}}]}}}, {"insert": {"rule": {"family": "ip", "table": "firewalld", "chain": "nat_POSTROUTING_ZONES", "expr": [{"match": {"left": {"meta": {"key": "oifname"}}, "op": "==", "right": "eth0"}}, {"goto": {"target": "nat_POST_public"}}]}}}, {"insert": {"rule": {"family": "ip6", "table": "firewalld", "chain": "nat_POSTROUTING_ZONES", "expr": [{"match": {"left": {"meta": {"key": "oifname"}}, "op": "==", "right": "eth0"}}, {"goto": {"target": "nat_POST_public"}}]}}}, {"insert": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_INPUT_ZONES", "expr": [{"match": {"left": {"meta": {"key": "iifname"}}, "op": "==", "right": "eth0"}}, {"goto": {"target": "filter_IN_public"}}]}}}, {"insert": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FORWARD_IN_ZONES", "expr": [{"match": {"left": {"meta": {"key": "iifname"}}, "op": "==", "right": "eth0"}}, {"goto": {"target": "filter_FWDI_public"}}]}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_public"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_public_pre"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_public_log"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_public_deny"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_public_allow"}}}, {"add": {"chain": {"family": "inet", "table": "firewalld", "name": "filter_FWDO_public_post"}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDO_public", "expr": [{"jump": {"target": "filter_FWDO_public_pre"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDO_public", "expr": [{"jump": {"target": "filter_FWDO_public_log"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDO_public", "expr": [{"jump": {"target": "filter_FWDO_public_deny"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDO_public", "expr": [{"jump": {"target": "filter_FWDO_public_allow"}}]}}}, {"add": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FWDO_public", "expr": [{"jump": {"target": "filter_FWDO_public_post"}}]}}}, {"insert": {"rule": {"family": "inet", "table": "firewalld", "chain": "filter_FORWARD_OUT_ZONES", "expr": [{"match": {"left": {"meta": {"key": "oifname"}}, "op": "==", "right": "eth0"}}, {"goto": {"target": "filter_FWDO_public"}}]}}}]}
I've googled a bit and found that IPset is not required in Nftables since nftables have something called sets. How do I configure Nftables sets using Firewalld? Please guide if I'm going wrong.
Thanks in advance.