powolony nginx na czystym systemie

[oczkers 0]

Na minimalistycznym gentoo stoi praktycznie tylko nginx, obciążenie więc praktycznie zerowe a nie potrafi obsłużyć więcej niż ~60 rps (statyczny plik z trescia 'czesc').

Szczerze mówiąc nie mam pojęcia jaka może być przyczyna, w jaki sposób można to dogłębniej zdiagnozować?

 

Konfiguracja nginx:

user nginx nginx;
worker_processes 4;
worker_cpu_affinity 0001 0010 0100 1000;
#worker_rlimit_nofile 4096;
error_log /var/log/nginx/error_log warn;
events {
worker_connections 1024;
use epoll;
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
log_format main
 '$remote_addr - $remote_user [$time_local] '
 '"$request" $status $bytes_sent '
 '"$http_referer" "$http_user_agent" '
 '"$gzip_ratio"';
#client_header_timeout 10m;
client_header_timeout 60;
#client_body_timeout 10m;
client_body_timeout 60;
#send_timeout 10m;
send_timeout 60;
connection_pool_size 256;
#client_max_body_size 4M;
client_header_buffer_size 1k;
large_client_header_buffers 4 8k;
#request_pool_size 4k;
request_pool_size 256;
server_tokens off;
gzip on;
gzip_min_length 0;
gzip_buffers 4 8k;
gzip_types text/plain;
output_buffers 1 32k;
postpone_output 1460;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
#keepalive_timeout 75 20;
keepalive_timeout 75;
ignore_invalid_headers on;

 

PS. Na czas testu wyczyściłem reguły iptables

 

EDIT: ewidentnie pomyliłem dział, a nie z tego co widzę nie mam możliwości usunięcia tematu więc proszę zacnego admina o przeniesienie do odpowiedniego działu

Edytowano Marzec 11, 2012 przez oczkers (zobacz historię edycji)

[Misiek08 285]

Jesteś pewien, że tylko tyle. Sprawdź np. ab lub innym po lokalu. Testy przez internet są mało miarodajne w takich badaniach, bo często po prostu strona testująca ma zapchane testami łącza lub leci przez jakiś zapchany do granic punkt.

[oczkers 0]

Identyczna sytuacja występuje na lighttpd więc jest to problem z ograniczaniem ilości jednorazowych połączeń z danego ip. Problem natomiast nie występuje przy testowaniu na localhost.

 

Pytanie brzmi czy mam coś namotane w konfiguracji kernela (o ile można coś takiego w ogóle zrobić) czy jest to standardowe ograniczenie nałożone przez serwerownie?

[huan 18]

Pytanie brzmi czy mam coś namotane w konfiguracji kernela (o ile można coś takiego w ogóle zrobić) czy jest to standardowe ograniczenie nałożone przez serwerownie?

 

A wstaw, co pokazuje:

sysctl -a | grep ipv4

 

Na czym stoi ten nginx? Na VPSie, czy dedyku?

[oczkers 0]

dedyk w ovh

 

guenon ~ # sysctl -a | grep ipv4
error: "Invalid argument" reading key "fs.binfmt_misc.register"
error: permission denied on key 'net.ipv4.route.flush'
kernel.osrelease = 3.2.9-xxxx-std-ipv4-64
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 = 5
net.ipv4.route.redirect_number = 9
net.ipv4.route.redirect_silence = 5120
net.ipv4.route.error_cost = 250
net.ipv4.route.error_burst = 1250
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.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 = 100
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 = 100
net.ipv4.neigh.default.proxy_delay = 80
net.ipv4.neigh.default.locktime = 100
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 = 100
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 = 100
net.ipv4.neigh.lo.proxy_delay = 80
net.ipv4.neigh.lo.locktime = 100
net.ipv4.neigh.lo.retrans_time_ms = 1000
net.ipv4.neigh.lo.base_reachable_time_ms = 30000
net.ipv4.neigh.dummy0.mcast_solicit = 3
net.ipv4.neigh.dummy0.ucast_solicit = 3
net.ipv4.neigh.dummy0.app_solicit = 0
net.ipv4.neigh.dummy0.retrans_time = 100
net.ipv4.neigh.dummy0.base_reachable_time = 30
net.ipv4.neigh.dummy0.delay_first_probe_time = 5
net.ipv4.neigh.dummy0.gc_stale_time = 60
net.ipv4.neigh.dummy0.unres_qlen = 3
net.ipv4.neigh.dummy0.proxy_qlen = 64
net.ipv4.neigh.dummy0.anycast_delay = 100
net.ipv4.neigh.dummy0.proxy_delay = 80
net.ipv4.neigh.dummy0.locktime = 100
net.ipv4.neigh.dummy0.retrans_time_ms = 1000
net.ipv4.neigh.dummy0.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 = 100
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 = 100
net.ipv4.neigh.eth0.proxy_delay = 80
net.ipv4.neigh.eth0.locktime = 100
net.ipv4.neigh.eth0.retrans_time_ms = 1000
net.ipv4.neigh.eth0.base_reachable_time_ms = 30000
net.ipv4.neigh.eth1.mcast_solicit = 3
net.ipv4.neigh.eth1.ucast_solicit = 3
net.ipv4.neigh.eth1.app_solicit = 0
net.ipv4.neigh.eth1.retrans_time = 100
net.ipv4.neigh.eth1.base_reachable_time = 30
net.ipv4.neigh.eth1.delay_first_probe_time = 5
net.ipv4.neigh.eth1.gc_stale_time = 60
net.ipv4.neigh.eth1.unres_qlen = 3
net.ipv4.neigh.eth1.proxy_qlen = 64
net.ipv4.neigh.eth1.anycast_delay = 100
net.ipv4.neigh.eth1.proxy_delay = 80
net.ipv4.neigh.eth1.locktime = 100
net.ipv4.neigh.eth1.retrans_time_ms = 1000
net.ipv4.neigh.eth1.base_reachable_time_ms = 30000
net.ipv4.neigh.tunl0.mcast_solicit = 3
net.ipv4.neigh.tunl0.ucast_solicit = 3
net.ipv4.neigh.tunl0.app_solicit = 0
net.ipv4.neigh.tunl0.retrans_time = 100
net.ipv4.neigh.tunl0.base_reachable_time = 30
net.ipv4.neigh.tunl0.delay_first_probe_time = 5
net.ipv4.neigh.tunl0.gc_stale_time = 60
net.ipv4.neigh.tunl0.unres_qlen = 3
net.ipv4.neigh.tunl0.proxy_qlen = 64
net.ipv4.neigh.tunl0.anycast_delay = 100
net.ipv4.neigh.tunl0.proxy_delay = 80
net.ipv4.neigh.tunl0.locktime = 100
net.ipv4.neigh.tunl0.retrans_time_ms = 1000
net.ipv4.neigh.tunl0.base_reachable_time_ms = 30000
net.ipv4.netfilter.ip_conntrack_generic_timeout = 600
net.ipv4.netfilter.ip_conntrack_tcp_timeout_syn_sent = 120
net.ipv4.netfilter.ip_conntrack_tcp_timeout_syn_sent2 = 120
net.ipv4.netfilter.ip_conntrack_tcp_timeout_syn_recv = 60
net.ipv4.netfilter.ip_conntrack_tcp_timeout_established = 432000
net.ipv4.netfilter.ip_conntrack_tcp_timeout_fin_wait = 120
net.ipv4.netfilter.ip_conntrack_tcp_timeout_close_wait = 60
net.ipv4.netfilter.ip_conntrack_tcp_timeout_last_ack = 30
net.ipv4.netfilter.ip_conntrack_tcp_timeout_time_wait = 120
net.ipv4.netfilter.ip_conntrack_tcp_timeout_close = 10
net.ipv4.netfilter.ip_conntrack_tcp_timeout_max_retrans = 300
net.ipv4.netfilter.ip_conntrack_tcp_loose = 1
net.ipv4.netfilter.ip_conntrack_tcp_be_liberal = 0
net.ipv4.netfilter.ip_conntrack_tcp_max_retrans = 3
net.ipv4.netfilter.ip_conntrack_udp_timeout = 30
net.ipv4.netfilter.ip_conntrack_udp_timeout_stream = 180
net.ipv4.netfilter.ip_conntrack_icmp_timeout = 30
net.ipv4.netfilter.ip_conntrack_max = 65536
net.ipv4.netfilter.ip_conntrack_count = 881
net.ipv4.netfilter.ip_conntrack_buckets = 16384
net.ipv4.netfilter.ip_conntrack_checksum = 1
net.ipv4.netfilter.ip_conntrack_log_invalid = 0
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_window_scaling = 0
net.ipv4.tcp_sack = 0
net.ipv4.tcp_retrans_collapse = 1
net.ipv4.ip_default_ttl = 64
net.ipv4.ip_no_pmtu_disc = 0
net.ipv4.ip_nonlocal_bind = 0
net.ipv4.tcp_syn_retries = 5
net.ipv4.tcp_synack_retries = 2
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_retries1 = 3
net.ipv4.tcp_retries2 = 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 = 2048
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.tcp_orphan_retries = 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 = 386472 515299 772944
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 = 0
net.ipv4.tcp_frto = 2
net.ipv4.tcp_frto_response = 0
net.ipv4.tcp_low_latency = 0
net.ipv4.tcp_no_metrics_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_dma_copybreak = 4096
net.ipv4.tcp_slow_start_after_idle = 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_cookie_size = 0
net.ipv4.tcp_thin_linear_timeouts = 0
net.ipv4.tcp_thin_dupack = 0
net.ipv4.udp_mem = 386472 515299 772944
net.ipv4.udp_rmem_min = 4096
net.ipv4.udp_wmem_min = 4096
net.ipv4.ip_queue_maxlen = 1024
net.ipv4.conf.all.forwarding = 0
net.ipv4.conf.all.mc_forwarding = 0
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.all.secure_redirects = 0
net.ipv4.conf.all.shared_media = 1
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.all.send_redirects = 1
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.all.accept_local = 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.default.forwarding = 0
net.ipv4.conf.default.mc_forwarding = 0
net.ipv4.conf.default.accept_redirects = 0
net.ipv4.conf.default.secure_redirects = 0
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.accept_local = 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.lo.forwarding = 0
net.ipv4.conf.lo.mc_forwarding = 0
net.ipv4.conf.lo.accept_redirects = 0
net.ipv4.conf.lo.secure_redirects = 0
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.accept_local = 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.dummy0.forwarding = 0
net.ipv4.conf.dummy0.mc_forwarding = 0
net.ipv4.conf.dummy0.accept_redirects = 0
net.ipv4.conf.dummy0.secure_redirects = 0
net.ipv4.conf.dummy0.shared_media = 1
net.ipv4.conf.dummy0.rp_filter = 1
net.ipv4.conf.dummy0.send_redirects = 1
net.ipv4.conf.dummy0.accept_source_route = 0
net.ipv4.conf.dummy0.accept_local = 0
net.ipv4.conf.dummy0.src_valid_mark = 0
net.ipv4.conf.dummy0.proxy_arp = 0
net.ipv4.conf.dummy0.medium_id = 0
net.ipv4.conf.dummy0.bootp_relay = 0
net.ipv4.conf.dummy0.log_martians = 0
net.ipv4.conf.dummy0.tag = 0
net.ipv4.conf.dummy0.arp_filter = 0
net.ipv4.conf.dummy0.arp_announce = 0
net.ipv4.conf.dummy0.arp_ignore = 0
net.ipv4.conf.dummy0.arp_accept = 0
net.ipv4.conf.dummy0.arp_notify = 0
net.ipv4.conf.dummy0.proxy_arp_pvlan = 0
net.ipv4.conf.dummy0.disable_xfrm = 0
net.ipv4.conf.dummy0.disable_policy = 0
net.ipv4.conf.dummy0.force_igmp_version = 0
net.ipv4.conf.dummy0.promote_secondaries = 0
net.ipv4.conf.eth0.forwarding = 0
net.ipv4.conf.eth0.mc_forwarding = 0
net.ipv4.conf.eth0.accept_redirects = 0
net.ipv4.conf.eth0.secure_redirects = 0
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.accept_local = 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.eth1.forwarding = 0
net.ipv4.conf.eth1.mc_forwarding = 0
net.ipv4.conf.eth1.accept_redirects = 0
net.ipv4.conf.eth1.secure_redirects = 0
net.ipv4.conf.eth1.shared_media = 1
net.ipv4.conf.eth1.rp_filter = 1
net.ipv4.conf.eth1.send_redirects = 1
net.ipv4.conf.eth1.accept_source_route = 0
net.ipv4.conf.eth1.accept_local = 0
net.ipv4.conf.eth1.src_valid_mark = 0
net.ipv4.conf.eth1.proxy_arp = 0
net.ipv4.conf.eth1.medium_id = 0
net.ipv4.conf.eth1.bootp_relay = 0
net.ipv4.conf.eth1.log_martians = 0
net.ipv4.conf.eth1.tag = 0
net.ipv4.conf.eth1.arp_filter = 0
net.ipv4.conf.eth1.arp_announce = 0
net.ipv4.conf.eth1.arp_ignore = 0
net.ipv4.conf.eth1.arp_accept = 0
net.ipv4.conf.eth1.arp_notify = 0
net.ipv4.conf.eth1.proxy_arp_pvlan = 0
net.ipv4.conf.eth1.disable_xfrm = 0
net.ipv4.conf.eth1.disable_policy = 0
net.ipv4.conf.eth1.force_igmp_version = 0
net.ipv4.conf.eth1.promote_secondaries = 0
net.ipv4.conf.tunl0.forwarding = 0
net.ipv4.conf.tunl0.mc_forwarding = 0
net.ipv4.conf.tunl0.accept_redirects = 0
net.ipv4.conf.tunl0.secure_redirects = 0
net.ipv4.conf.tunl0.shared_media = 1
net.ipv4.conf.tunl0.rp_filter = 1
net.ipv4.conf.tunl0.send_redirects = 1
net.ipv4.conf.tunl0.accept_source_route = 0
net.ipv4.conf.tunl0.accept_local = 0
net.ipv4.conf.tunl0.src_valid_mark = 0
net.ipv4.conf.tunl0.proxy_arp = 0
net.ipv4.conf.tunl0.medium_id = 0
net.ipv4.conf.tunl0.bootp_relay = 0
net.ipv4.conf.tunl0.log_martians = 0
net.ipv4.conf.tunl0.tag = 0
net.ipv4.conf.tunl0.arp_filter = 0
net.ipv4.conf.tunl0.arp_announce = 0
net.ipv4.conf.tunl0.arp_ignore = 0
net.ipv4.conf.tunl0.arp_accept = 0
net.ipv4.conf.tunl0.arp_notify = 0
net.ipv4.conf.tunl0.proxy_arp_pvlan = 0
net.ipv4.conf.tunl0.disable_xfrm = 0
net.ipv4.conf.tunl0.disable_policy = 0
net.ipv4.conf.tunl0.force_igmp_version = 0
net.ipv4.conf.tunl0.promote_secondaries = 0
net.ipv4.ip_forward = 0
net.ipv4.xfrm4_gc_thresh = 4194304
net.ipv4.ipfrag_high_thresh = 262144
net.ipv4.ipfrag_low_thresh = 196608
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.ipfrag_secret_interval = 600
net.ipv4.ipfrag_max_dist = 64