SYN flood sur mysql server

Considérez cette structure: DB <-TCP3306- WEB{1,2,3,4} Tous les servers sont CentOS 6/7
Les servers Web exécutent PHP (en utilisant php-fpm ) qui se connecte au server MySQL.
Parfois, je reçois ce message d'erreur sur le côté PHP:

 Lost connection to MySQL server at 'reading initial communication packet', system error: 104 

Et ceci sur le server DB:

 possible SYN flooding on port 3306. Sending cookies. 

Ma théorie actuelle est que les servers Web ouvrent trop de sockets, remplissant la stack réseau du server DB avec de nouvelles sockets plus rapidement que MySQL peut les accept .
J'ai essayé de modifier les valeurs suivantes:

  • net.ipv4.tcp_max_syn_backlog
  • net.core.somaxconn
  • net.ipv4.tcp_tw_reuse

Mais sans utilité.
Je ne suis pas sûr de savoir si je peux même confirmer ma théorie de socket pendante, ou résoudre cette situation. Un éventuel


Voici mon sysctl -a | grep ^net sysctl -a | grep ^net sur DB:

 net.netfilter.nf_log.0 = NONE net.netfilter.nf_log.1 = NONE net.netfilter.nf_log.2 = nfnetlink_log net.netfilter.nf_log.3 = NONE net.netfilter.nf_log.4 = NONE net.netfilter.nf_log.5 = NONE net.netfilter.nf_log.6 = NONE net.netfilter.nf_log.7 = NONE net.netfilter.nf_log.8 = NONE net.netfilter.nf_log.9 = NONE net.netfilter.nf_log.10 = NONE net.netfilter.nf_log.11 = NONE net.netfilter.nf_log.12 = NONE net.netfilter.nf_conntrack_generic_timeout = 600 net.netfilter.nf_conntrack_tcp_timeout_syn_sent = 120 net.netfilter.nf_conntrack_tcp_timeout_syn_recv = 60 net.netfilter.nf_conntrack_tcp_timeout_established = 432000 net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 120 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 60 net.netfilter.nf_conntrack_tcp_timeout_last_ack = 30 net.netfilter.nf_conntrack_tcp_timeout_time_wait = 120 net.netfilter.nf_conntrack_tcp_timeout_close = 10 net.netfilter.nf_conntrack_tcp_timeout_max_retrans = 300 net.netfilter.nf_conntrack_tcp_timeout_unacknowledged = 300 net.netfilter.nf_conntrack_tcp_loose = 1 net.netfilter.nf_conntrack_tcp_be_liberal = 0 net.netfilter.nf_conntrack_tcp_max_retrans = 3 net.netfilter.nf_conntrack_udp_timeout = 30 net.netfilter.nf_conntrack_udp_timeout_stream = 180 net.netfilter.nf_conntrack_icmpv6_timeout = 30 net.netfilter.nf_conntrack_icmp_timeout = 30 net.netfilter.nf_conntrack_acct = 0 net.netfilter.nf_conntrack_events = 1 net.netfilter.nf_conntrack_events_retry_timeout = 15 net.netfilter.nf_conntrack_max = 500000 net.netfilter.nf_conntrack_count = 25048 net.netfilter.nf_conntrack_buckets = 16384 net.netfilter.nf_conntrack_checksum = 1 net.netfilter.nf_conntrack_log_invalid = 0 net.netfilter.nf_conntrack_expect_max = 256 net.core.somaxconn = 5000 net.core.xfrm_aevent_etime = 10 net.core.xfrm_aevent_rseqth = 2 net.core.xfrm_larval_drop = 1 net.core.xfrm_acq_expires = 30 net.core.wmem_max = 124928 net.core.rmem_max = 124928 net.core.wmem_default = 124928 net.core.rmem_default = 124928 net.core.dev_weight = 64 net.core.netdev_max_backlog = 1000 net.core.netdev_rss_key = 00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00 net.core.message_cost = 5 net.core.message_burst = 10 net.core.optmem_max = 20480 net.core.rps_sock_flow_ensortinges = 0 net.core.busy_poll = 0 net.core.busy_read = 0 net.core.netdev_budget = 300 net.core.warnings = 1 net.ipv4.route.gc_thresh = 524288 net.ipv4.route.max_size = 8388608 net.ipv4.route.gc_min_interval = 0 net.ipv4.route.gc_min_interval_ms = 500 net.ipv4.route.gc_timeout = 300 net.ipv4.route.gc_interval = 60 net.ipv4.route.redirect_load = 20 net.ipv4.route.redirect_number = 9 net.ipv4.route.redirect_silence = 20480 net.ipv4.route.error_cost = 1000 net.ipv4.route.error_burst = 5000 net.ipv4.route.gc_elasticity = 8 net.ipv4.route.mtu_expires = 600 net.ipv4.route.min_pmtu = 552 net.ipv4.route.min_adv_mss = 256 net.ipv4.route.secret_interval = 600 net.ipv4.neigh.default.mcast_solicit = 3 net.ipv4.neigh.default.ucast_solicit = 3 net.ipv4.neigh.default.app_solicit = 0 net.ipv4.neigh.default.retrans_time = 99 net.ipv4.neigh.default.base_reachable_time = 30 net.ipv4.neigh.default.delay_first_probe_time = 5 net.ipv4.neigh.default.gc_stale_time = 60 net.ipv4.neigh.default.unres_qlen = 3 net.ipv4.neigh.default.proxy_qlen = 64 net.ipv4.neigh.default.anycast_delay = 99 net.ipv4.neigh.default.proxy_delay = 79 net.ipv4.neigh.default.locktime = 99 net.ipv4.neigh.default.retrans_time_ms = 1000 net.ipv4.neigh.default.base_reachable_time_ms = 30000 net.ipv4.neigh.default.gc_interval = 30 net.ipv4.neigh.default.gc_thresh1 = 128 net.ipv4.neigh.default.gc_thresh2 = 512 net.ipv4.neigh.default.gc_thresh3 = 1024 net.ipv4.neigh.lo.mcast_solicit = 3 net.ipv4.neigh.lo.ucast_solicit = 3 net.ipv4.neigh.lo.app_solicit = 0 net.ipv4.neigh.lo.retrans_time = 99 net.ipv4.neigh.lo.base_reachable_time = 30 net.ipv4.neigh.lo.delay_first_probe_time = 5 net.ipv4.neigh.lo.gc_stale_time = 60 net.ipv4.neigh.lo.unres_qlen = 3 net.ipv4.neigh.lo.proxy_qlen = 64 net.ipv4.neigh.lo.anycast_delay = 99 net.ipv4.neigh.lo.proxy_delay = 79 net.ipv4.neigh.lo.locktime = 99 net.ipv4.neigh.lo.retrans_time_ms = 1000 net.ipv4.neigh.lo.base_reachable_time_ms = 30000 net.ipv4.neigh.eth0.mcast_solicit = 3 net.ipv4.neigh.eth0.ucast_solicit = 3 net.ipv4.neigh.eth0.app_solicit = 0 net.ipv4.neigh.eth0.retrans_time = 99 net.ipv4.neigh.eth0.base_reachable_time = 30 net.ipv4.neigh.eth0.delay_first_probe_time = 5 net.ipv4.neigh.eth0.gc_stale_time = 60 net.ipv4.neigh.eth0.unres_qlen = 3 net.ipv4.neigh.eth0.proxy_qlen = 64 net.ipv4.neigh.eth0.anycast_delay = 99 net.ipv4.neigh.eth0.proxy_delay = 79 net.ipv4.neigh.eth0.locktime = 99 net.ipv4.neigh.eth0.retrans_time_ms = 1000 net.ipv4.neigh.eth0.base_reachable_time_ms = 30000 net.ipv4.tcp_timestamps = 1 net.ipv4.tcp_window_scaling = 1 net.ipv4.tcp_sack = 1 net.ipv4.tcp_retrans_collapse = 1 net.ipv4.ip_default_ttl = 64 net.ipv4.ip_nonlocal_bind = 0 net.ipv4.tcp_syn_resortinges = 5 net.ipv4.tcp_synack_resortinges = 5 net.ipv4.tcp_max_orphans = 262144 net.ipv4.tcp_max_tw_buckets = 262144 net.ipv4.ip_dynaddr = 0 net.ipv4.tcp_keepalive_time = 7200 net.ipv4.tcp_keepalive_probes = 9 net.ipv4.tcp_keepalive_intvl = 75 net.ipv4.tcp_resortinges1 = 3 net.ipv4.tcp_resortinges2 = 15 net.ipv4.tcp_fin_timeout = 60 net.ipv4.tcp_syncookies = 1 net.ipv4.tcp_tw_recycle = 0 net.ipv4.tcp_abort_on_overflow = 0 net.ipv4.tcp_stdurg = 0 net.ipv4.tcp_rfc1337 = 0 net.ipv4.tcp_max_syn_backlog = 16384 net.ipv4.ip_local_port_range = 32768 61000 net.ipv4.ip_local_reserved_ports = net.ipv4.igmp_max_memberships = 20 net.ipv4.igmp_max_msf = 10 net.ipv4.inet_peer_threshold = 65664 net.ipv4.inet_peer_minttl = 120 net.ipv4.inet_peer_maxttl = 600 net.ipv4.inet_peer_gc_mintime = 10 net.ipv4.inet_peer_gc_maxtime = 120 net.ipv4.tcp_orphan_resortinges = 0 net.ipv4.tcp_fack = 1 net.ipv4.tcp_reordering = 3 net.ipv4.tcp_ecn = 2 net.ipv4.tcp_dsack = 1 net.ipv4.tcp_mem = 1529376 2039168 3058752 net.ipv4.tcp_wmem = 4096 16384 4194304 net.ipv4.tcp_rmem = 4096 87380 4194304 net.ipv4.tcp_app_win = 31 net.ipv4.tcp_adv_win_scale = 2 net.ipv4.tcp_tw_reuse = 1 net.ipv4.tcp_frto = 2 net.ipv4.tcp_frto_response = 0 net.ipv4.tcp_low_latency = 0 net.ipv4.tcp_no_mesortingcs_save = 0 net.ipv4.tcp_moderate_rcvbuf = 1 net.ipv4.tcp_tso_win_divisor = 3 net.ipv4.tcp_congestion_control = cubic net.ipv4.tcp_abc = 0 net.ipv4.tcp_mtu_probing = 0 net.ipv4.tcp_base_mss = 512 net.ipv4.tcp_workaround_signed_windows = 0 net.ipv4.tcp_challenge_ack_limit = 100 net.ipv4.tcp_limit_output_bytes = 262144 net.ipv4.tcp_dma_copybreak = 4096 net.ipv4.tcp_slow_start_after_idle = 1 net.ipv4.cipso_cache_enable = 1 net.ipv4.cipso_cache_bucket_size = 10 net.ipv4.cipso_rbm_optfmt = 0 net.ipv4.cipso_rbm_ssortingctvalid = 1 net.ipv4.tcp_available_congestion_control = cubic reno net.ipv4.tcp_allowed_congestion_control = cubic reno net.ipv4.tcp_max_ssthresh = 0 net.ipv4.tcp_thin_linear_timeouts = 0 net.ipv4.tcp_thin_dupack = 0 net.ipv4.tcp_min_tso_segs = 2 net.ipv4.udp_mem = 1529376 2039168 3058752 net.ipv4.udp_rmem_min = 4096 net.ipv4.udp_wmem_min = 4096 net.ipv4.conf.all.forwarding = 0 net.ipv4.conf.all.mc_forwarding = 0 net.ipv4.conf.all.accept_redirects = 1 net.ipv4.conf.all.secure_redirects = 1 net.ipv4.conf.all.shared_media = 1 net.ipv4.conf.all.rp_filter = 0 net.ipv4.conf.all.send_redirects = 1 net.ipv4.conf.all.accept_source_route = 0 net.ipv4.conf.all.src_valid_mark = 0 net.ipv4.conf.all.proxy_arp = 0 net.ipv4.conf.all.medium_id = 0 net.ipv4.conf.all.bootp_relay = 0 net.ipv4.conf.all.log_martians = 0 net.ipv4.conf.all.tag = 0 net.ipv4.conf.all.arp_filter = 0 net.ipv4.conf.all.arp_announce = 0 net.ipv4.conf.all.arp_ignore = 0 net.ipv4.conf.all.arp_accept = 0 net.ipv4.conf.all.arp_notify = 0 net.ipv4.conf.all.proxy_arp_pvlan = 0 net.ipv4.conf.all.disable_xfrm = 0 net.ipv4.conf.all.disable_policy = 0 net.ipv4.conf.all.force_igmp_version = 0 net.ipv4.conf.all.promote_secondaries = 0 net.ipv4.conf.all.accept_local = 0 net.ipv4.conf.all.route_localnet = 0 net.ipv4.conf.default.forwarding = 0 net.ipv4.conf.default.mc_forwarding = 0 net.ipv4.conf.default.accept_redirects = 1 net.ipv4.conf.default.secure_redirects = 1 net.ipv4.conf.default.shared_media = 1 net.ipv4.conf.default.rp_filter = 1 net.ipv4.conf.default.send_redirects = 1 net.ipv4.conf.default.accept_source_route = 0 net.ipv4.conf.default.src_valid_mark = 0 net.ipv4.conf.default.proxy_arp = 0 net.ipv4.conf.default.medium_id = 0 net.ipv4.conf.default.bootp_relay = 0 net.ipv4.conf.default.log_martians = 0 net.ipv4.conf.default.tag = 0 net.ipv4.conf.default.arp_filter = 0 net.ipv4.conf.default.arp_announce = 0 net.ipv4.conf.default.arp_ignore = 0 net.ipv4.conf.default.arp_accept = 0 net.ipv4.conf.default.arp_notify = 0 net.ipv4.conf.default.proxy_arp_pvlan = 0 net.ipv4.conf.default.disable_xfrm = 0 net.ipv4.conf.default.disable_policy = 0 net.ipv4.conf.default.force_igmp_version = 0 net.ipv4.conf.default.promote_secondaries = 0 net.ipv4.conf.default.accept_local = 0 net.ipv4.conf.default.route_localnet = 0 net.ipv4.conf.lo.forwarding = 0 net.ipv4.conf.lo.mc_forwarding = 0 net.ipv4.conf.lo.accept_redirects = 1 net.ipv4.conf.lo.secure_redirects = 1 net.ipv4.conf.lo.shared_media = 1 net.ipv4.conf.lo.rp_filter = 1 net.ipv4.conf.lo.send_redirects = 1 net.ipv4.conf.lo.accept_source_route = 0 net.ipv4.conf.lo.src_valid_mark = 0 net.ipv4.conf.lo.proxy_arp = 0 net.ipv4.conf.lo.medium_id = 0 net.ipv4.conf.lo.bootp_relay = 0 net.ipv4.conf.lo.log_martians = 0 net.ipv4.conf.lo.tag = 0 net.ipv4.conf.lo.arp_filter = 0 net.ipv4.conf.lo.arp_announce = 0 net.ipv4.conf.lo.arp_ignore = 0 net.ipv4.conf.lo.arp_accept = 0 net.ipv4.conf.lo.arp_notify = 0 net.ipv4.conf.lo.proxy_arp_pvlan = 0 net.ipv4.conf.lo.disable_xfrm = 1 net.ipv4.conf.lo.disable_policy = 1 net.ipv4.conf.lo.force_igmp_version = 0 net.ipv4.conf.lo.promote_secondaries = 0 net.ipv4.conf.lo.accept_local = 0 net.ipv4.conf.lo.route_localnet = 0 net.ipv4.conf.eth0.forwarding = 0 net.ipv4.conf.eth0.mc_forwarding = 0 net.ipv4.conf.eth0.accept_redirects = 1 net.ipv4.conf.eth0.secure_redirects = 1 net.ipv4.conf.eth0.shared_media = 1 net.ipv4.conf.eth0.rp_filter = 1 net.ipv4.conf.eth0.send_redirects = 1 net.ipv4.conf.eth0.accept_source_route = 0 net.ipv4.conf.eth0.src_valid_mark = 0 net.ipv4.conf.eth0.proxy_arp = 0 net.ipv4.conf.eth0.medium_id = 0 net.ipv4.conf.eth0.bootp_relay = 0 net.ipv4.conf.eth0.log_martians = 0 net.ipv4.conf.eth0.tag = 0 net.ipv4.conf.eth0.arp_filter = 0 net.ipv4.conf.eth0.arp_announce = 0 net.ipv4.conf.eth0.arp_ignore = 0 net.ipv4.conf.eth0.arp_accept = 0 net.ipv4.conf.eth0.arp_notify = 0 net.ipv4.conf.eth0.proxy_arp_pvlan = 0 net.ipv4.conf.eth0.disable_xfrm = 0 net.ipv4.conf.eth0.disable_policy = 0 net.ipv4.conf.eth0.force_igmp_version = 0 net.ipv4.conf.eth0.promote_secondaries = 0 net.ipv4.conf.eth0.accept_local = 0 net.ipv4.conf.eth0.route_localnet = 0 net.ipv4.ip_forward = 0 net.ipv4.xfrm4_gc_thresh = 4194304 net.ipv4.ipfrag_high_thresh = 4194304 net.ipv4.ipfrag_low_thresh = 3145728 net.ipv4.ipfrag_time = 30 net.ipv4.icmp_echo_ignore_all = 0 net.ipv4.icmp_echo_ignore_broadcasts = 1 net.ipv4.icmp_ignore_bogus_error_responses = 1 net.ipv4.icmp_errors_use_inbound_ifaddr = 0 net.ipv4.icmp_ratelimit = 1000 net.ipv4.icmp_ratemask = 6168 net.ipv4.rt_cache_rebuild_count = 4 net.ipv4.ping_group_range = 1 0 net.ipv4.ip_no_pmtu_disc = 0 net.ipv4.ip_forward_use_pmtu = 0 net.ipv4.ipfrag_secret_interval = 600 net.ipv4.ipfrag_max_dist = 64 net.ipv6.neigh.default.mcast_solicit = 3 net.ipv6.neigh.default.ucast_solicit = 3 net.ipv6.neigh.default.app_solicit = 0 net.ipv6.neigh.default.delay_first_probe_time = 5 net.ipv6.neigh.default.gc_stale_time = 60 net.ipv6.neigh.default.unres_qlen = 3 net.ipv6.neigh.default.proxy_qlen = 64 net.ipv6.neigh.default.anycast_delay = 99 net.ipv6.neigh.default.proxy_delay = 79 net.ipv6.neigh.default.locktime = 0 net.ipv6.neigh.default.retrans_time_ms = 1000 net.ipv6.neigh.default.base_reachable_time_ms = 30000 net.ipv6.neigh.default.gc_interval = 30 net.ipv6.neigh.default.gc_thresh1 = 128 net.ipv6.neigh.default.gc_thresh2 = 512 net.ipv6.neigh.default.gc_thresh3 = 1024 net.ipv6.neigh.lo.mcast_solicit = 3 net.ipv6.neigh.lo.ucast_solicit = 3 net.ipv6.neigh.lo.app_solicit = 0 net.ipv6.neigh.lo.delay_first_probe_time = 5 net.ipv6.neigh.lo.gc_stale_time = 60 net.ipv6.neigh.lo.unres_qlen = 3 net.ipv6.neigh.lo.proxy_qlen = 64 net.ipv6.neigh.lo.anycast_delay = 99 net.ipv6.neigh.lo.proxy_delay = 79 net.ipv6.neigh.lo.locktime = 0 net.ipv6.neigh.lo.retrans_time_ms = 1000 net.ipv6.neigh.lo.base_reachable_time_ms = 30000 net.ipv6.neigh.eth0.mcast_solicit = 3 net.ipv6.neigh.eth0.ucast_solicit = 3 net.ipv6.neigh.eth0.app_solicit = 0 net.ipv6.neigh.eth0.delay_first_probe_time = 5 net.ipv6.neigh.eth0.gc_stale_time = 60 net.ipv6.neigh.eth0.unres_qlen = 3 net.ipv6.neigh.eth0.proxy_qlen = 64 net.ipv6.neigh.eth0.anycast_delay = 99 net.ipv6.neigh.eth0.proxy_delay = 79 net.ipv6.neigh.eth0.locktime = 0 net.ipv6.neigh.eth0.retrans_time_ms = 1000 net.ipv6.neigh.eth0.base_reachable_time_ms = 30000 net.ipv6.xfrm6_gc_thresh = 2048 net.ipv6.conf.all.forwarding = 0 net.ipv6.conf.all.hop_limit = 64 net.ipv6.conf.all.mtu = 1280 net.ipv6.conf.all.accept_ra = 1 net.ipv6.conf.all.accept_redirects = 1 net.ipv6.conf.all.autoconf = 1 net.ipv6.conf.all.dad_transmits = 1 net.ipv6.conf.all.router_solicitations = 3 net.ipv6.conf.all.router_solicitation_interval = 4 net.ipv6.conf.all.router_solicitation_delay = 1 net.ipv6.conf.all.force_mld_version = 0 net.ipv6.conf.all.use_tempaddr = 0 net.ipv6.conf.all.temp_valid_lft = 604800 net.ipv6.conf.all.temp_prefered_lft = 86400 net.ipv6.conf.all.regen_max_retry = 5 net.ipv6.conf.all.max_desync_factor = 600 net.ipv6.conf.all.max_addresses = 16 net.ipv6.conf.all.accept_ra_defrtr = 1 net.ipv6.conf.all.accept_ra_pinfo = 1 net.ipv6.conf.all.accept_ra_rtr_pref = 1 net.ipv6.conf.all.router_probe_interval = 60 net.ipv6.conf.all.accept_ra_rt_info_max_plen = 0 net.ipv6.conf.all.proxy_ndp = 0 net.ipv6.conf.all.accept_source_route = 0 net.ipv6.conf.all.optimistic_dad = 0 net.ipv6.conf.all.mc_forwarding = 0 net.ipv6.conf.all.disable_ipv6 = 0 net.ipv6.conf.all.accept_dad = 1 net.ipv6.conf.default.forwarding = 0 net.ipv6.conf.default.hop_limit = 64 net.ipv6.conf.default.mtu = 1280 net.ipv6.conf.default.accept_ra = 1 net.ipv6.conf.default.accept_redirects = 1 net.ipv6.conf.default.autoconf = 1 net.ipv6.conf.default.dad_transmits = 1 net.ipv6.conf.default.router_solicitations = 3 net.ipv6.conf.default.router_solicitation_interval = 4 net.ipv6.conf.default.router_solicitation_delay = 1 net.ipv6.conf.default.force_mld_version = 0 net.ipv6.conf.default.use_tempaddr = 0 net.ipv6.conf.default.temp_valid_lft = 604800 net.ipv6.conf.default.temp_prefered_lft = 86400 net.ipv6.conf.default.regen_max_retry = 5 net.ipv6.conf.default.max_desync_factor = 600 net.ipv6.conf.default.max_addresses = 16 net.ipv6.conf.default.accept_ra_defrtr = 1 net.ipv6.conf.default.accept_ra_pinfo = 1 net.ipv6.conf.default.accept_ra_rtr_pref = 1 net.ipv6.conf.default.router_probe_interval = 60 net.ipv6.conf.default.accept_ra_rt_info_max_plen = 0 net.ipv6.conf.default.proxy_ndp = 0 net.ipv6.conf.default.accept_source_route = 0 net.ipv6.conf.default.optimistic_dad = 0 net.ipv6.conf.default.mc_forwarding = 0 net.ipv6.conf.default.disable_ipv6 = 0 net.ipv6.conf.default.accept_dad = 1 net.ipv6.conf.lo.forwarding = 0 net.ipv6.conf.lo.hop_limit = 64 net.ipv6.conf.lo.mtu = 65536 net.ipv6.conf.lo.accept_ra = 1 net.ipv6.conf.lo.accept_redirects = 1 net.ipv6.conf.lo.autoconf = 1 net.ipv6.conf.lo.dad_transmits = 1 net.ipv6.conf.lo.router_solicitations = 3 net.ipv6.conf.lo.router_solicitation_interval = 4 net.ipv6.conf.lo.router_solicitation_delay = 1 net.ipv6.conf.lo.force_mld_version = 0 net.ipv6.conf.lo.use_tempaddr = -1 net.ipv6.conf.lo.temp_valid_lft = 604800 net.ipv6.conf.lo.temp_prefered_lft = 86400 net.ipv6.conf.lo.regen_max_retry = 5 net.ipv6.conf.lo.max_desync_factor = 600 net.ipv6.conf.lo.max_addresses = 16 net.ipv6.conf.lo.accept_ra_defrtr = 1 net.ipv6.conf.lo.accept_ra_pinfo = 1 net.ipv6.conf.lo.accept_ra_rtr_pref = 1 net.ipv6.conf.lo.router_probe_interval = 60 net.ipv6.conf.lo.accept_ra_rt_info_max_plen = 0 net.ipv6.conf.lo.proxy_ndp = 0 net.ipv6.conf.lo.accept_source_route = 0 net.ipv6.conf.lo.optimistic_dad = 0 net.ipv6.conf.lo.mc_forwarding = 0 net.ipv6.conf.lo.disable_ipv6 = 0 net.ipv6.conf.lo.accept_dad = -1 net.ipv6.conf.eth0.forwarding = 0 net.ipv6.conf.eth0.hop_limit = 64 net.ipv6.conf.eth0.mtu = 9001 net.ipv6.conf.eth0.accept_ra = 1 net.ipv6.conf.eth0.accept_redirects = 1 net.ipv6.conf.eth0.autoconf = 1 net.ipv6.conf.eth0.dad_transmits = 1 net.ipv6.conf.eth0.router_solicitations = 3 net.ipv6.conf.eth0.router_solicitation_interval = 4 net.ipv6.conf.eth0.router_solicitation_delay = 1 net.ipv6.conf.eth0.force_mld_version = 0 net.ipv6.conf.eth0.use_tempaddr = 0 net.ipv6.conf.eth0.temp_valid_lft = 604800 net.ipv6.conf.eth0.temp_prefered_lft = 86400 net.ipv6.conf.eth0.regen_max_retry = 5 net.ipv6.conf.eth0.max_desync_factor = 600 net.ipv6.conf.eth0.max_addresses = 16 net.ipv6.conf.eth0.accept_ra_defrtr = 1 net.ipv6.conf.eth0.accept_ra_pinfo = 1 net.ipv6.conf.eth0.accept_ra_rtr_pref = 1 net.ipv6.conf.eth0.router_probe_interval = 60 net.ipv6.conf.eth0.accept_ra_rt_info_max_plen = 0 net.ipv6.conf.eth0.proxy_ndp = 0 net.ipv6.conf.eth0.accept_source_route = 0 net.ipv6.conf.eth0.optimistic_dad = 0 net.ipv6.conf.eth0.mc_forwarding = 0 net.ipv6.conf.eth0.disable_ipv6 = 0 net.ipv6.conf.eth0.accept_dad = 1 net.ipv6.ip6frag_high_thresh = 4194304 net.ipv6.ip6frag_low_thresh = 3145728 net.ipv6.ip6frag_time = 60 net.ipv6.route.gc_thresh = 1024 net.ipv6.route.max_size = 16384 net.ipv6.route.gc_min_interval = 0 net.ipv6.route.gc_timeout = 60 net.ipv6.route.gc_interval = 30 net.ipv6.route.gc_elasticity = 0 net.ipv6.route.mtu_expires = 600 net.ipv6.route.min_adv_mss = 1 net.ipv6.route.gc_min_interval_ms = 500 net.ipv6.icmp.ratelimit = 1000 net.ipv6.bindv6only = 0 net.ipv6.nf_conntrack_frag6_timeout = 60 net.ipv6.nf_conntrack_frag6_low_thresh = 3145728 net.ipv6.nf_conntrack_frag6_high_thresh = 4194304 net.ipv6.ip6frag_secret_interval = 600 net.ipv6.mld_max_msf = 64 net.nf_conntrack_max = 500000 net.unix.max_dgram_qlen = 10