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Dzięki za podpowiedź. Tak więc sprawdziłem i poniżej wrzucam screeny wyniku dwóch komend iptables -L oraz -S. Nie widzę tam żeby port 8086 był blokowany, a ogólna reguła input ma status ACCEPT. Chyba że źle to rozumuję, to proszę wskażcie błąd. Komenda: sudo iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination f2b-sshd tcp -- anywhere anywhere multiport dports s sh ACCEPT all -- anywhere anywhere state RELATED,ESTA BLISHED ACCEPT icmp -- anywhere anywhere ACCEPT all -- anywhere anywhere ACCEPT udp -- anywhere anywhere udp spt:ntp ACCEPT tcp -- anywhere anywhere state NEW tcp dpt: ssh REJECT all -- anywhere anywhere reject-with icmp-h ost-prohibited Chain FORWARD (policy ACCEPT) target prot opt source destination REJECT all -- anywhere anywhere reject-with icmp-h ost-prohibited Chain OUTPUT (policy ACCEPT) target prot opt source destination InstanceServices all -- anywhere link-local/16 Chain InstanceServices (1 references) target prot opt source destination ACCEPT tcp -- anywhere X.X.0.2 owner UID match ro ot tcp dpt:iscsi-target /* See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule */ ACCEPT tcp -- anywhere X.X.2.0/24 owner UID match ro ot tcp dpt:iscsi-target /* See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule */ ACCEPT tcp -- anywhere X.X.4.0/24 owner UID match ro ot tcp dpt:iscsi-target /* See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule */ ACCEPT tcp -- anywhere X.X.5.0/24 owner UID match ro ot tcp dpt:iscsi-target /* See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule */ ACCEPT tcp -- anywhere X.X.0.2 tcp dpt:http /* Se e the Oracle-Provided Images section in the Oracle Cloud Infrastructure document ation for security impact of modifying or removing this rule */ ACCEPT udp -- anywhere X.X.169.254 udp dpt:domain /* See the Oracle-Provided Images section in the Oracle Cloud Infrastructure docume ntation for security impact of modifying or removing this rule */ ACCEPT tcp -- anywhere X.X.169.254 tcp dpt:domain /* See the Oracle-Provided Images section in the Oracle Cloud Infrastructure docume ntation for security impact of modifying or removing this rule */ ACCEPT tcp -- anywhere X.X.0.3 owner UID match ro ot tcp dpt:http /* See the Oracle-Provided Images section in the Oracle Cloud In frastructure documentation for security impact of modifying or removing this rul e */ ACCEPT tcp -- anywhere X.X.0.4 tcp dpt:http /* Se e the Oracle-Provided Images section in the Oracle Cloud Infrastructure document ation for security impact of modifying or removing this rule */ ACCEPT tcp -- anywhere X.X.169.254 tcp dpt:http /* Se e the Oracle-Provided Images section in the Oracle Cloud Infrastructure document ation for security impact of modifying or removing this rule */ ACCEPT udp -- anywhere X.X.169.254 udp dpt:bootps /* See the Oracle-Provided Images section in the Oracle Cloud Infrastructure docume ntation for security impact of modifying or removing this rule */ ACCEPT udp -- anywhere X.X.169.254 udp dpt:tftp /* Se e the Oracle-Provided Images section in the Oracle Cloud Infrastructure document ation for security impact of modifying or removing this rule */ ACCEPT udp -- anywhere X.X.169.254 udp dpt:ntp /* See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documenta tion for security impact of modifying or removing this rule */ REJECT tcp -- anywhere link-local/16 tcp /* See the Ora cle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule */ reject-with tcp-reset REJECT udp -- anywhere link-local/16 udp /* See the Ora cle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule */ reject-with icmp-port-unr eachable Chain f2b-sshd (1 references) target prot opt source destination RETURN all -- anywhere anywhere oraz komenda: sudo iptables -S -P INPUT ACCEPT -P FORWARD ACCEPT -P OUTPUT ACCEPT -N InstanceServices -N f2b-sshd -A INPUT -p tcp -m multiport --dports 22 -j f2b-sshd -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -p udp -m udp --sport 123 -j ACCEPT -A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -j REJECT --reject-with icmp-host-prohibited -A OUTPUT -d X.X.0.0/16 -j InstanceServices -A InstanceServices -d X.X.0.2/32 -p tcp -m owner --uid-owner 0 -m tcp --dport 3260 -m comment --comment "See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule" -j ACCEPT -A InstanceServices -d X.X.2.0/24 -p tcp -m owner --uid-owner 0 -m tcp --dport 3260 -m comment --comment "See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule" -j ACCEPT -A InstanceServices -d X.X.4.0/24 -p tcp -m owner --uid-owner 0 -m tcp --dport 3260 -m comment --comment "See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule" -j ACCEPT -A InstanceServices -d X.X.5.0/24 -p tcp -m owner --uid-owner 0 -m tcp --dport 3260 -m comment --comment "See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule" -j ACCEPT -A InstanceServices -d X.X.0.2/32 -p tcp -m tcp --dport 80 -m comment --comment "See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule" -j ACCEPT -A InstanceServices -d X.X.169.254/32 -p udp -m udp --dport 53 -m comment --comment "See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule" -j ACCEPT -A InstanceServices -d X.X.169.254/32 -p tcp -m tcp --dport 53 -m comment --comment "See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule" -j ACCEPT -A InstanceServices -d X.X.0.3/32 -p tcp -m owner --uid-owner 0 -m tcp --dport 80 -m comment --comment "See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule" -j ACCEPT -A InstanceServices -d X.X.0.4/32 -p tcp -m tcp --dport 80 -m comment --comment "See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule" -j ACCEPT -A InstanceServices -d X.X.169.254/32 -p tcp -m tcp --dport 80 -m comment --comment "See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule" -j ACCEPT -A InstanceServices -d X.X.169.254/32 -p udp -m udp --dport 67 -m comment --comment "See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule" -j ACCEPT -A InstanceServices -d X.X.169.254/32 -p udp -m udp --dport 69 -m comment --comment "See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule" -j ACCEPT -A InstanceServices -d X.X.169.254/32 -p udp -m udp --dport 123 -m comment --comment "See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule" -j ACCEPT -A InstanceServices -d X.X.0.0/16 -p tcp -m tcp -m comment --comment "See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule" -j REJECT --reject-with tcp-reset -A InstanceServices -d X.X.0.0/16 -p udp -m udp -m comment --comment "See the Oracle-Provided Images section in the Oracle Cloud Infrastructure documentation for security impact of modifying or removing this rule" -j REJECT --reject-with icmp-port-unreachable -A f2b-sshd -j RETURN

Cześć Udało mi się uruchomić darmowy serwer VPS w serwisie Oracle Cloud Free Tier (procesor AMD). Na tym serwerze poprzez dostęp SSH udało mi sie zainstalować bazę InfluxDB i mam w planie jeszcze Grafanę. W domu mam urządzenie - konkretnie Smogomierz - który ma wysyłać pomiary do bazy Influx. Po stronie urządzenia mam wszystko skonfigurowane (adres IP, port 8086, baza danych, user bazy, hasło). Coś musi być nie tak na serwerze. Wcześniej korzystałem chwilę z VPS od OVH i tam mi wszystko działało, rekordy pojawiały się w bazie danych. Co waszym zdaniem może blokować wysyłanie danych do bazy? Co powinienem skonfigurować jeszcze i w jaki sposób? Czytałem coś o iptables, ale czy to może mieć wpływ? Szukałem informacji w google, ale trochę błądzę po omacku. Jedyne co znalazłem to konfiguracja zapory poprzez dodanie reguł w panelu, zakładka Primary VNIC -> Subnet -> List - i tutaj dla "Ingress rules" oraz "Egress rules" dodanie rekordu: 0.0.0.0/0 dla wszystkich protokołów. Zaznaczam, że jestem laikiem, więc proszę o wyrozumiałość i porady lub podpowiedzi w najprostszy możliwy sposób