| [SOLVED] IPTables connection tracking stopped working. [message #50723] |
Sat, 19 October 2013 12:49  |
non7top
Messages: 5
Registered: October 2013
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Junior Member |
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Hello everyone.
Just about yesterday I decided to reboot several of my containers just to realize that iptables --state rules stopped working. I still have one container running without reboot(for 23 days) which has these rules working as expected. I don't think I made changes on containers iptables rules, but did make some changes on VE0, including several os updates. Ping from inside the container work just fine.
Here are the relevant config outputs.
VE0 iptables/route
# iptables-save
# Generated by iptables-save v1.4.7 on Sat Oct 19 16:38:33 2013
*mangle
:PREROUTING ACCEPT [104195:74172610]
:INPUT ACCEPT [22158:2977388]
:FORWARD ACCEPT [82037:71195222]
:OUTPUT ACCEPT [17925:31501333]
:POSTROUTING ACCEPT [99962:102696555]
COMMIT
# Completed on Sat Oct 19 16:38:33 2013
# Generated by iptables-save v1.4.7 on Sat Oct 19 16:38:33 2013
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [17925:31501333]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 45510 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 8080:8081 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 20:21 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 30000:31000 -j ACCEPT
-A INPUT -p udp -m udp --dport 33434:33523 -j REJECT --reject-with icmp-port-unreachable
-A INPUT -p udp -m udp --dport 44450:44500 -j REJECT --reject-with icmp-port-unreachable
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -s 37.200.71.8/29 -j ACCEPT
-A FORWARD -d 37.200.71.8/29 -j ACCEPT
-A FORWARD -s 192.168.11.0/24 -j ACCEPT
-A FORWARD -d 192.168.11.0/24 -j ACCEPT
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
# Completed on Sat Oct 19 16:38:33 2013
# Generated by iptables-save v1.4.7 on Sat Oct 19 16:38:33 2013
*nat
:PREROUTING ACCEPT [2912:166427]
:POSTROUTING ACCEPT [1639:93157]
:OUTPUT ACCEPT [98:5998]
-A PREROUTING -d 37.200.71.10/32 -i eth0 -p tcp -m tcp --dport 10080 -j DNAT --to-destination 192.168.11.1:80
-A PREROUTING -d 37.200.71.10/32 -i eth0 -p tcp -m tcp --dport 45511 -j DNAT --to-destination 192.168.11.1:22
-A PREROUTING -d 37.200.71.10/32 -i eth0 -p tcp -m tcp --dport 10082 -j DNAT --to-destination 192.168.11.2:80
-A PREROUTING -d 37.200.71.10/32 -i eth0 -p tcp -m tcp --dport 45512 -j DNAT --to-destination 192.168.11.2:22
-A POSTROUTING -s 192.168.11.1/32 -o eth0 -j SNAT --to-source 37.200.71.10
-A POSTROUTING -s 192.168.11.2/32 -o eth0 -j SNAT --to-source 37.200.71.10
COMMIT
# Completed on Sat Oct 19 16:38:33 2013
# ip r
192.168.11.1 dev venet0 scope link
37.200.71.14 dev venet0 scope link
37.200.71.13 dev venet0 scope link
37.200.71.12 dev venet0 scope link
37.200.71.11 dev venet0 scope link
37.200.71.8/29 dev eth0 proto kernel scope link src 37.200.71.10
default via 37.200.71.9 dev eth0
# lsmod|grep -e ip_ -e xt_ -e nf_ -e ipta
xt_length 1338 0
xt_hl 1547 0
xt_tcpmss 1623 0
xt_TCPMSS 3461 0
iptable_mangle 3493 0
xt_multiport 2716 0
xt_limit 2134 0
xt_dscp 2073 0
nf_nat_ftp 3523 0
nf_conntrack_ftp 12929 1 nf_nat_ftp
xt_DSCP 2849 0
xt_state 1508 10
iptable_filter 2937 5
iptable_nat 6302 1
nf_nat 23213 3 vzrst,nf_nat_ftp,iptable_nat
nf_conntrack_ipv4 9946 13 iptable_nat,nf_nat
nf_conntrack 80524 8 vzrst,vzcpt,nf_nat_ftp,nf_conntrack_ftp,xt_state,iptable_nat ,nf_nat,nf_conntrack_ipv4
nf_defrag_ipv4 1531 1 nf_conntrack_ipv4
ip_tables 18151 3 iptable_mangle,iptable_filter,iptable_nat
vz.conf
# cat /etc/vz/vz.conf
## Global parameters
VIRTUOZZO=yes
LOCKDIR=/vz/lock
DUMPDIR=/vz/dump
VE0CPUUNITS=1000
VE_STOP_MODE=suspend
## Logging parameters
LOGGING=yes
LOGFILE=/var/log/vzctl.log
LOG_LEVEL=0
VERBOSE=0
## Disk quota parameters
DISK_QUOTA=yes
VZFASTBOOT=no
# Disable module loading. If set, vz initscript does not load any modules.
#MODULES_DISABLED=yes
# The name of the device whose IP address will be used as source IP for CT.
# By default automatically assigned.
#VE_ROUTE_SRC_DEV="eth0"
# Uncomment to limit CT IP ARP announces only to network interfaces
# having IPs within the same IP network as a container IP.
# Leave commented out to use all interfaces.
#NEIGHBOUR_DEVS=detect
## Fail if there is another machine in the network with the same IP
ERROR_ON_ARPFAIL="no"
## Template parameters
TEMPLATE=/vz/template
## Defaults for containers
VE_ROOT=/vz/root/$VEID
VE_PRIVATE=/vz/private/$VEID
CONFIGFILE="vswap-256m"
DEF_OSTEMPLATE="centos-6-x86"
NAMESERVER=inherit # Copy from host system's /etc/resolv.conf
## Filesystem layout for new CTs: either simfs (default) or ploop
#VE_LAYOUT=ploop
# User namespace configuration
LOCAL_UID=100000
LOCAL_GID=100000
## Load vzwdog module
VZWDOG="no"
## IPv4 iptables kernel modules to be enabled in CTs by default
IPTABLES="ipt_REJECT ipt_tos ipt_limit ipt_multiport iptable_filter iptable_mangle ipt_TCPMSS ipt_tcpmss ipt_ttl ipt_length"
## IPv4 iptables kernel modules to be loaded by init.d/vz script
IPTABLES_MODULES="$IPTABLES"
## Enable IPv6
IPV6="no"
## IPv6 ip6tables kernel modules
IP6TABLES="ip6_tables ip6table_filter ip6table_mangle ip6t_REJECT"
Working VE101
iptables
# iptables -vnL
Chain INPUT (policy DROP 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
19M 43G ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- venet0:0 * 0.0.0.0/0 0.0.0.0/0
58M 15G ACCEPT all -- venet0 * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
200 7124 REJECT udp -- * * 0.0.0.0/0 0.0.0.0/0 udp dpts:33434:33523 reject-with icmp-port-unreachable
0 0 REJECT udp -- * * 0.0.0.0/0 0.0.0.0/0 udp dpts:44450:44500 reject-with icmp-port-unreachable
1563K 89M ALLOW all -- * * 0.0.0.0/0 0.0.0.0/0
19503 1292K LOGDROP all -- * * 0.0.0.0/0 0.0.0.0/0
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 103M packets, 143G bytes)
pkts bytes target prot opt in out source destination
Chain ALLOW (1 references)
pkts bytes target prot opt in out source destination
95 5668 ACCEPT tcp -- venet0 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:45510
1476K 83M ACCEPT tcp -- venet0 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:80
84 4000 ACCEPT tcp -- venet0 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:8080
21689 1210K ACCEPT tcp -- venet0 * 0.0.0.0/0 0.0.0.0/0 tcp dpts:20:21
45216 3588K ACCEPT icmp -- venet0 * 0.0.0.0/0 0.0.0.0/0
Chain LOGDROP (1 references)
pkts bytes target prot opt in out source destination
19503 1292K LOG all -- * * 0.0.0.0/0 0.0.0.0/0 LOG flags 0 level 7 prefix `IPT_DROP: '
19503 1292K DROP all -- * * 0.0.0.0/0 0.0.0.0/0
Non working VE102
iptables
# iptables -vnL
Chain INPUT (policy DROP 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
8222 9208K ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- venet0:0 * 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
0 0 REJECT udp -- * * 0.0.0.0/0 0.0.0.0/0 udp dpts:33434:33523 reject-with icmp-port-unreachable
0 0 REJECT udp -- * * 0.0.0.0/0 0.0.0.0/0 udp dpts:44450:44500 reject-with icmp-port-unreachable
11603 817K ALLOW all -- * * 0.0.0.0/0 0.0.0.0/0
68 10972 LOGDROP all -- * * 0.0.0.0/0 0.0.0.0/0
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 37542 packets, 48M bytes)
pkts bytes target prot opt in out source destination
Chain ALLOW (1 references)
pkts bytes target prot opt in out source destination
103 10396 ACCEPT tcp -- venet0 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:45510
11391 792K ACCEPT tcp -- venet0 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:80
0 0 ACCEPT tcp -- venet0 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:8080
0 0 ACCEPT tcp -- venet0 * 0.0.0.0/0 0.0.0.0/0 tcp dpts:20:21
0 0 ACCEPT tcp -- venet0 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:53
39 2718 ACCEPT udp -- venet0 * 0.0.0.0/0 0.0.0.0/0 udp dpt:53
2 148 ACCEPT icmp -- venet0 * 0.0.0.0/0 0.0.0.0/0
Chain LOGDROP (1 references)
pkts bytes target prot opt in out source destination
68 10972 LOG all -- * * 0.0.0.0/0 0.0.0.0/0 LOG flags 0 level 7 prefix `IPT_DROP
...
[Updated on: Sun, 20 October 2013 13:19] Report message to a moderator |
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