I am experiencing a strange problem with iptables: after in activate them, they are gone in a few minutes. For example, I drop traffic from an ip and after few seconds, all rules are flushed without touching anything!
Do you find iptables enough or do you use a hardware firewall for linux? I haven't used anything less than hardware firewalls for years but I gather than most simply rely on iptables. Is that a smart choice?
# iptables -D INPUT -s 220.127.116.11 -j DROP iptables v1.3.8: Couldn't load target `standard':/usr/local/lib/iptables/libipt_standard.so: cannot open shared object file: No such file or directory What is going on? The libipt_standard.so file is located in /lib/iptables, but not /usr/local/lib/iptables. I tried moving all of the libipt files into the /usr/local/lib/iptables directory, but I got segmentation errors.
[root@localhost ~]# service iptables status Firewall is stopped. [root@localhost ~]# service iptables start Flushing firewall rules: [ OK ] Setting chains to policy ACCEPT: mangle filter [ OK ] Unloading iptables modules: ^[[A [ OK ] [root@localhost ~]# service iptables status Firewall is stopped.
it said iptables is stop...even I start manually...
I am not sure APF is running correctly because of iptables..
CSF dont ban the IP and if manually it is done I get following error. ---------------- csf -d 18.104.22.168 Adding 22.214.171.124 to csf.deny and iptables DROP... iptables: Index of insertion too big DROP all opt -- in !lo out * 126.96.36.199 -> 0.0.0.0/0 Error: iptables command [/sbin/iptables -v -I INPUT 2 -i ! lo -s 188.8.131.52 -j DROP] failed, at line 864 ------------------- Also iptables is not running on server. If status is checked it says its stopped.
I have many sites on my server I dont want to get any downtime.
Please let us know how can we fix this issue as soon as possible.
I have tried reinstall CSF but still the issue remains same.
I keep trying to flush my iptables on my linux server but every time i try to do so my server seems to freeze (i lose access and have to reboot it for it to come back online), how can I go about deleting those ips manually rather than executing the flushing command? what options do I have?
root@xxxx[~]# service iptables status Firewall is stopped. root@xxxx[~]# service iptables start Flushing firewall rules: [ OK ] Setting chains to policy ACCEPT: filter [ OK ] Unloading iptables modules: [ OK ] root@xxxx[~]# service iptables status Firewall is stopped.
i create a template for xen ( hypervm ) from jailtime site. now i install iptables , but iptables do not work and when i enter " service iptables restart" , iptables do not start. ( i check it from "service iptables status" )
I used a script to block some unwanted countries from accessing my site. In total I had about 3000 lines with ipranges. Now I just went ahead and put this on one of the servers, one that I really don't need the traffic on. But I am wondering what kind of affect this may have on the speeds. Will it really affect it more then a few ms? And anything else I should maybe worry about? Except maybe the loading time at reboots.
I upgraded to the 2.6.27 kernel and iptables to 1.4.2 but can't seem to get CSF to run and i believe its because of conntrack not being found:
Code: error: "net.netfilter.nf_conntrack_icmp_timeout" is an unknown key error: "net.netfilter.nf_conntrack_tcp_timeout_close" is an unknown key error: "net.netfilter.nf_conntrack_tcp_timeout_time_wait" is an unknown key error: "net.netfilter.nf_conntrack_tcp_timeout_last_ack" is an unknown key error: "net.netfilter.nf_conntrack_tcp_timeout_close_wait" is an unknown key error: "net.netfilter.nf_conntrack_tcp_timeout_fin_wait" is an unknown key error: "net.netfilter.nf_conntrack_tcp_timeout_established" is an unknown key error: "net.netfilter.nf_conntrack_tcp_timeout_syn_recv" is an unknown key error: "net.netfilter.nf_conntrack_tcp_timeout_syn_sent" is an unknown key error: "net.netfilter.nf_conntrack_udp_timeout" is an unknown key error: "net.netfilter.nf_conntrack_udp_timeout_stream" is an unknown key net.netfilter.nf_conntrack_max = 262144 kernel config:
Code: # # Core Netfilter Configuration # CONFIG_NETFILTER_NETLINK=m CONFIG_NETFILTER_NETLINK_QUEUE=m CONFIG_NETFILTER_NETLINK_LOG=m CONFIG_NF_CONNTRACK=m CONFIG_NF_CT_ACCT=y CONFIG_NF_CONNTRACK_MARK=y # CONFIG_NF_CONNTRACK_SECMARK is not set # CONFIG_NF_CONNTRACK_EVENTS is not set CONFIG_NF_CT_PROTO_DCCP=m CONFIG_NF_CT_PROTO_SCTP=m # CONFIG_NF_CT_PROTO_UDPLITE is not set # CONFIG_NF_CONNTRACK_AMANDA is not set CONFIG_NF_CONNTRACK_FTP=m # CONFIG_NF_CONNTRACK_H323 is not set # CONFIG_NF_CONNTRACK_IRC is not set # CONFIG_NF_CONNTRACK_NETBIOS_NS is not set # CONFIG_NF_CONNTRACK_PPTP is not set # CONFIG_NF_CONNTRACK_SANE is not set # CONFIG_NF_CONNTRACK_SIP is not set # CONFIG_NF_CONNTRACK_TFTP is not set # CONFIG_NF_CT_NETLINK is not set CONFIG_NETFILTER_XTABLES=m CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m CONFIG_NETFILTER_XT_TARGET_CONNMARK=m # CONFIG_NETFILTER_XT_TARGET_DSCP is not set CONFIG_NETFILTER_XT_TARGET_MARK=m CONFIG_NETFILTER_XT_TARGET_NFQUEUE=m # CONFIG_NETFILTER_XT_TARGET_NFLOG is not set CONFIG_NETFILTER_XT_TARGET_NOTRACK=m # CONFIG_NETFILTER_XT_TARGET_RATEEST is not set # CONFIG_NETFILTER_XT_TARGET_TRACE is not set CONFIG_NETFILTER_XT_TARGET_SECMARK=m # CONFIG_NETFILTER_XT_TARGET_TCPMSS is not set # CONFIG_NETFILTER_XT_TARGET_TCPOPTSTRIP is not set CONFIG_NETFILTER_XT_MATCH_COMMENT=m CONFIG_NETFILTER_XT_MATCH_CONNBYTES=m....