projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| c9f9e0e1 JP |
1 | /proc/sys/net/netfilter/nf_conntrack_* Variables: |
| 2 | ||
| 3 | nf_conntrack_acct - BOOLEAN | |
| 4 | 0 - disabled (default) | |
| 5 | not 0 - enabled | |
| 6 | ||
| 7 | Enable connection tracking flow accounting. 64-bit byte and packet | |
| 8 | counters per flow are added. | |
| 9 | ||
| 3183ab89 | 10 | nf_conntrack_buckets - INTEGER |
| c9f9e0e1 JP |
11 | Size of hash table. If not specified as parameter during module |
| 12 | loading, the default size is calculated by dividing total memory | |
| 13 | by 16384 to determine the number of buckets but the hash table will | |
| 88eab472 ML |
14 | never have fewer than 32 and limited to 16384 buckets. For systems |
| 15 | with more than 4GB of memory it will be 65536 buckets. | |
| 3183ab89 | 16 | This sysctl is only writeable in the initial net namespace. |
| c9f9e0e1 JP |
17 | |
| 18 | nf_conntrack_checksum - BOOLEAN | |
| 19 | 0 - disabled | |
| 20 | not 0 - enabled (default) | |
| 21 | ||
| 22 | Verify checksum of incoming packets. Packets with bad checksums are | |
| 23 | in INVALID state. If this is enabled, such packets will not be | |
| 24 | considered for connection tracking. | |
| 25 | ||
| 26 | nf_conntrack_count - INTEGER (read-only) | |
| 27 | Number of currently allocated flow entries. | |
| 28 | ||
| 29 | nf_conntrack_events - BOOLEAN | |
| 30 | 0 - disabled | |
| 31 | not 0 - enabled (default) | |
| 32 | ||
| 33 | If this option is enabled, the connection tracking code will | |
| 34 | provide userspace with connection tracking events via ctnetlink. | |
| 35 | ||
| 36 | nf_conntrack_events_retry_timeout - INTEGER (seconds) | |
| 37 | default 15 | |
| 38 | ||
| 39 | This option is only relevant when "reliable connection tracking | |
| 40 | events" are used. Normally, ctnetlink is "lossy", that is, | |
| 41 | events are normally dropped when userspace listeners can't keep up. | |
| 42 | ||
| 43 | Userspace can request "reliable event mode". When this mode is | |
| 44 | active, the conntrack will only be destroyed after the event was | |
| 45 | delivered. If event delivery fails, the kernel periodically | |
| 46 | re-tries to send the event to userspace. | |
| 47 | ||
| 48 | This is the maximum interval the kernel should use when re-trying | |
| 49 | to deliver the destroy event. | |
| 50 | ||
| 51 | A higher number means there will be fewer delivery retries and it | |
| 52 | will take longer for a backlog to be processed. | |
| 53 | ||
| 54 | nf_conntrack_expect_max - INTEGER | |
| 55 | Maximum size of expectation table. Default value is | |
| 56 | nf_conntrack_buckets / 256. Minimum is 1. | |
| 57 | ||
| 58 | nf_conntrack_frag6_high_thresh - INTEGER | |
| 59 | default 262144 | |
| 60 | ||
| 61 | Maximum memory used to reassemble IPv6 fragments. When | |
| 62 | nf_conntrack_frag6_high_thresh bytes of memory is allocated for this | |
| 63 | purpose, the fragment handler will toss packets until | |
| 64 | nf_conntrack_frag6_low_thresh is reached. | |
| 65 | ||
| 66 | nf_conntrack_frag6_low_thresh - INTEGER | |
| 67 | default 196608 | |
| 68 | ||
| 69 | See nf_conntrack_frag6_low_thresh | |
| 70 | ||
| 71 | nf_conntrack_frag6_timeout - INTEGER (seconds) | |
| 72 | default 60 | |
| 73 | ||
| 74 | Time to keep an IPv6 fragment in memory. | |
| 75 | ||
| 76 | nf_conntrack_generic_timeout - INTEGER (seconds) | |
| 77 | default 600 | |
| 78 | ||
| 79 | Default for generic timeout. This refers to layer 4 unknown/unsupported | |
| 80 | protocols. | |
| 81 | ||
| 82 | nf_conntrack_helper - BOOLEAN | |
| 83 | 0 - disabled | |
| 84 | not 0 - enabled (default) | |
| 85 | ||
| 86 | Enable automatic conntrack helper assignment. | |
| 87 | ||
| 88 | nf_conntrack_icmp_timeout - INTEGER (seconds) | |
| 89 | default 30 | |
| 90 | ||
| 91 | Default for ICMP timeout. | |
| 92 | ||
| 93 | nf_conntrack_icmpv6_timeout - INTEGER (seconds) | |
| 94 | default 30 | |
| 95 | ||
| 96 | Default for ICMP6 timeout. | |
| 97 | ||
| 98 | nf_conntrack_log_invalid - INTEGER | |
| 99 | 0 - disable (default) | |
| 100 | 1 - log ICMP packets | |
| 101 | 6 - log TCP packets | |
| 102 | 17 - log UDP packets | |
| 103 | 33 - log DCCP packets | |
| 104 | 41 - log ICMPv6 packets | |
| 105 | 136 - log UDPLITE packets | |
| 106 | 255 - log packets of any protocol | |
| 107 | ||
| 108 | Log invalid packets of a type specified by value. | |
| 109 | ||
| 110 | nf_conntrack_max - INTEGER | |
| 111 | Size of connection tracking table. Default value is | |
| 112 | nf_conntrack_buckets value * 4. | |
| 113 | ||
| 114 | nf_conntrack_tcp_be_liberal - BOOLEAN | |
| 115 | 0 - disabled (default) | |
| 116 | not 0 - enabled | |
| 117 | ||
| 118 | Be conservative in what you do, be liberal in what you accept from others. | |
| 119 | If it's non-zero, we mark only out of window RST segments as INVALID. | |
| 120 | ||
| 121 | nf_conntrack_tcp_loose - BOOLEAN | |
| 122 | 0 - disabled | |
| 123 | not 0 - enabled (default) | |
| 124 | ||
| 125 | If it is set to zero, we disable picking up already established | |
| 126 | connections. | |
| 127 | ||
| 128 | nf_conntrack_tcp_max_retrans - INTEGER | |
| 129 | default 3 | |
| 130 | ||
| 131 | Maximum number of packets that can be retransmitted without | |
| 132 | received an (acceptable) ACK from the destination. If this number | |
| 133 | is reached, a shorter timer will be started. | |
| 134 | ||
| 135 | nf_conntrack_tcp_timeout_close - INTEGER (seconds) | |
| 136 | default 10 | |
| 137 | ||
| 138 | nf_conntrack_tcp_timeout_close_wait - INTEGER (seconds) | |
| 139 | default 60 | |
| 140 | ||
| 141 | nf_conntrack_tcp_timeout_established - INTEGER (seconds) | |
| 142 | default 432000 (5 days) | |
| 143 | ||
| 144 | nf_conntrack_tcp_timeout_fin_wait - INTEGER (seconds) | |
| 145 | default 120 | |
| 146 | ||
| 147 | nf_conntrack_tcp_timeout_last_ack - INTEGER (seconds) | |
| 148 | default 30 | |
| 149 | ||
| 150 | nf_conntrack_tcp_timeout_max_retrans - INTEGER (seconds) | |
| 151 | default 300 | |
| 152 | ||
| 153 | nf_conntrack_tcp_timeout_syn_recv - INTEGER (seconds) | |
| 154 | default 60 | |
| 155 | ||
| 156 | nf_conntrack_tcp_timeout_syn_sent - INTEGER (seconds) | |
| 157 | default 120 | |
| 158 | ||
| 159 | nf_conntrack_tcp_timeout_time_wait - INTEGER (seconds) | |
| 160 | default 120 | |
| 161 | ||
| 162 | nf_conntrack_tcp_timeout_unacknowledged - INTEGER (seconds) | |
| 163 | default 300 | |
| 164 | ||
| 165 | nf_conntrack_timestamp - BOOLEAN | |
| 166 | 0 - disabled (default) | |
| 167 | not 0 - enabled | |
| 168 | ||
| 169 | Enable connection tracking flow timestamping. | |
| 170 | ||
| 171 | nf_conntrack_udp_timeout - INTEGER (seconds) | |
| 172 | default 30 | |
| 173 | ||
| 174 | nf_conntrack_udp_timeout_stream2 - INTEGER (seconds) | |
| 175 | default 180 | |
| 176 | ||
| 177 | This extended timeout will be used in case there is an UDP stream | |
| 178 | detected. |