Nmap Development mailing list archives
Re: "No buffer space available" when scanning a Class A or B net
From: Bob McLaren <BobMcLaren () fssi-ca com>
Date: Fri, 05 Mar 2004 10:48:26 -0800
Here are the settings that I had: net.ipv4.tcp_rmem = 4096 87380 174760 net.ipv4.tcp_wmem = 4096 16384 131072 net.ipv4.tcp_mem = 48128 48640 49152 net.core.rmem_default = 65535 net.core.wmem_default = 65535 net.core.rmem_max = 65535 net.core.wmem_max = 65535 And here is what I changed them to: net.ipv4.tcp_rmem = 4096 87380 8388608 net.ipv4.tcp_wmem = 4096 65536 8388608 net.ipv4.tcp_mem = 4096 4096 4096 net.core.rmem_default = 65536 net.core.wmem_default = 65536 net.core.rmem_max = 8388608 net.core.wmem_max = 8388608Unfortunately, they did not seem to have an affect. I am still receiving those error messages with those grueling pauses. Any other buffer settings that I could play with?
In case there is any useful information in it, I am including a dump from 'free' and from 'sysctl -a' (I know it's a lot of info to be pasting into an email, but I'm not sure what is or is not relevant. Plus I'm desparate...)
----------------------------------------------------------- total used free shared buffers cached Mem: 254648 188852 65796 656 3772 85260 -/+ buffers/cache: 99820 154828 Swap: 530104 51800 478304 ----------------------------------------------------------- sunrpc.nlm_debug = 0 sunrpc.nfsd_debug = 0 sunrpc.nfs_debug = 0 sunrpc.rpc_debug = 0 abi.fake_utsname = 0 abi.trace = 0 abi.defhandler_libcso = 68157441 abi.defhandler_lcall7 = 68157441 abi.defhandler_elf = 0 abi.defhandler_coff = 117440515 dev.raid.speed_limit_max = 100000 dev.raid.speed_limit_min = 100 net.ipx.ipx_pprop_broadcasting = 1 net.unix.max_dgram_qlen = 10 net.token-ring.rif_timeout = 60000 net.ipv4.conf.eth0.arp_filter = 0 net.ipv4.conf.eth0.tag = 0 net.ipv4.conf.eth0.log_martians = 0 net.ipv4.conf.eth0.bootp_relay = 0 net.ipv4.conf.eth0.proxy_arp = 0 net.ipv4.conf.eth0.accept_source_route = 1 net.ipv4.conf.eth0.send_redirects = 1 net.ipv4.conf.eth0.rp_filter = 0 net.ipv4.conf.eth0.shared_media = 1 net.ipv4.conf.eth0.secure_redirects = 1 net.ipv4.conf.eth0.accept_redirects = 1 net.ipv4.conf.eth0.mc_forwarding = 0 net.ipv4.conf.eth0.forwarding = 0 net.ipv4.conf.lo.arp_filter = 0 net.ipv4.conf.lo.tag = 0 net.ipv4.conf.lo.log_martians = 0 net.ipv4.conf.lo.bootp_relay = 0 net.ipv4.conf.lo.proxy_arp = 0 net.ipv4.conf.lo.accept_source_route = 1 net.ipv4.conf.lo.send_redirects = 1 net.ipv4.conf.lo.rp_filter = 0 net.ipv4.conf.lo.shared_media = 1 net.ipv4.conf.lo.secure_redirects = 1 net.ipv4.conf.lo.accept_redirects = 1 net.ipv4.conf.lo.mc_forwarding = 0 net.ipv4.conf.lo.forwarding = 0 net.ipv4.conf.default.arp_filter = 0 net.ipv4.conf.default.tag = 0 net.ipv4.conf.default.log_martians = 0 net.ipv4.conf.default.bootp_relay = 0 net.ipv4.conf.default.proxy_arp = 0 net.ipv4.conf.default.accept_source_route = 1 net.ipv4.conf.default.send_redirects = 1 net.ipv4.conf.default.rp_filter = 0 net.ipv4.conf.default.shared_media = 1 net.ipv4.conf.default.secure_redirects = 1 net.ipv4.conf.default.accept_redirects = 1 net.ipv4.conf.default.mc_forwarding = 0 net.ipv4.conf.default.forwarding = 0 net.ipv4.conf.all.arp_filter = 0 net.ipv4.conf.all.tag = 0 net.ipv4.conf.all.log_martians = 0 net.ipv4.conf.all.bootp_relay = 0 net.ipv4.conf.all.proxy_arp = 0 net.ipv4.conf.all.accept_source_route = 0 net.ipv4.conf.all.send_redirects = 1 net.ipv4.conf.all.rp_filter = 1 net.ipv4.conf.all.shared_media = 1 net.ipv4.conf.all.secure_redirects = 1 net.ipv4.conf.all.accept_redirects = 1 net.ipv4.conf.all.mc_forwarding = 0 net.ipv4.conf.all.forwarding = 0 net.ipv4.neigh.eth0.locktime = 100 net.ipv4.neigh.eth0.proxy_delay = 80 net.ipv4.neigh.eth0.anycast_delay = 100 net.ipv4.neigh.eth0.proxy_qlen = 64 net.ipv4.neigh.eth0.unres_qlen = 3 net.ipv4.neigh.eth0.gc_stale_time = 60 net.ipv4.neigh.eth0.delay_first_probe_time = 5 net.ipv4.neigh.eth0.base_reachable_time = 30 net.ipv4.neigh.eth0.retrans_time = 100 net.ipv4.neigh.eth0.app_solicit = 0 net.ipv4.neigh.eth0.ucast_solicit = 3 net.ipv4.neigh.eth0.mcast_solicit = 3 net.ipv4.neigh.lo.locktime = 100 net.ipv4.neigh.lo.proxy_delay = 80 net.ipv4.neigh.lo.anycast_delay = 100 net.ipv4.neigh.lo.proxy_qlen = 64 net.ipv4.neigh.lo.unres_qlen = 3 net.ipv4.neigh.lo.gc_stale_time = 60 net.ipv4.neigh.lo.delay_first_probe_time = 5 net.ipv4.neigh.lo.base_reachable_time = 30 net.ipv4.neigh.lo.retrans_time = 100 net.ipv4.neigh.lo.app_solicit = 0 net.ipv4.neigh.lo.ucast_solicit = 3 net.ipv4.neigh.lo.mcast_solicit = 3 net.ipv4.neigh.default.gc_thresh3 = 1024 net.ipv4.neigh.default.gc_thresh2 = 512 net.ipv4.neigh.default.gc_thresh1 = 128 net.ipv4.neigh.default.gc_interval = 30 net.ipv4.neigh.default.locktime = 100 net.ipv4.neigh.default.proxy_delay = 80 net.ipv4.neigh.default.anycast_delay = 100 net.ipv4.neigh.default.proxy_qlen = 64 net.ipv4.neigh.default.unres_qlen = 3 net.ipv4.neigh.default.gc_stale_time = 60 net.ipv4.neigh.default.delay_first_probe_time = 5 net.ipv4.neigh.default.base_reachable_time = 30 net.ipv4.neigh.default.retrans_time = 100 net.ipv4.neigh.default.app_solicit = 0 net.ipv4.neigh.default.ucast_solicit = 3 net.ipv4.neigh.default.mcast_solicit = 3 net.ipv4.icmp_ratemask = 6168 net.ipv4.icmp_ratelimit = 100 net.ipv4.tcp_adv_win_scale = 2 net.ipv4.tcp_app_win = 31 net.ipv4.tcp_rmem = 4096 87380 8388608 net.ipv4.tcp_wmem = 4096 65536 8388608 net.ipv4.tcp_mem = 48128 48640 49152 net.ipv4.tcp_dsack = 1 net.ipv4.tcp_ecn = 0 net.ipv4.tcp_reordering = 3 net.ipv4.tcp_fack = 1 net.ipv4.tcp_orphan_retries = 0 net.ipv4.inet_peer_gc_maxtime = 120 net.ipv4.inet_peer_gc_mintime = 10 net.ipv4.inet_peer_maxttl = 600 net.ipv4.inet_peer_minttl = 120 net.ipv4.inet_peer_threshold = 65664 net.ipv4.igmp_max_memberships = 20 net.ipv4.route.min_adv_mss = 256 net.ipv4.route.min_pmtu = 552 net.ipv4.route.mtu_expires = 600 net.ipv4.route.gc_elasticity = 8 net.ipv4.route.error_burst = 500 net.ipv4.route.error_cost = 100 net.ipv4.route.redirect_silence = 2048 net.ipv4.route.redirect_number = 9 net.ipv4.route.redirect_load = 2 net.ipv4.route.gc_interval = 60 net.ipv4.route.gc_timeout = 300 net.ipv4.route.gc_min_interval = 5 net.ipv4.route.max_size = 32768 net.ipv4.route.gc_thresh = 2048 net.ipv4.route.max_delay = 10 net.ipv4.route.min_delay = 2 net.ipv4.icmp_ignore_bogus_error_responses = 0 net.ipv4.icmp_echo_ignore_broadcasts = 0 net.ipv4.icmp_echo_ignore_all = 0 net.ipv4.ip_local_port_range = 32768 61000 net.ipv4.tcp_max_syn_backlog = 1024 net.ipv4.tcp_rfc1337 = 0 net.ipv4.tcp_stdurg = 0 net.ipv4.tcp_abort_on_overflow = 0 net.ipv4.tcp_tw_recycle = 0 net.ipv4.tcp_syncookies = 0 net.ipv4.tcp_fin_timeout = 60 net.ipv4.tcp_retries2 = 15 net.ipv4.tcp_retries1 = 3 net.ipv4.tcp_keepalive_intvl = 75 net.ipv4.tcp_keepalive_probes = 9 net.ipv4.tcp_keepalive_time = 7200 net.ipv4.ipfrag_time = 30 net.ipv4.ip_dynaddr = 0 net.ipv4.ipfrag_low_thresh = 196608 net.ipv4.ipfrag_high_thresh = 262144 net.ipv4.tcp_max_tw_buckets = 180000 net.ipv4.tcp_max_orphans = 8192 net.ipv4.tcp_synack_retries = 5 net.ipv4.tcp_syn_retries = 5 net.ipv4.ip_nonlocal_bind = 0 net.ipv4.ip_no_pmtu_disc = 0 net.ipv4.ip_autoconfig = 0 net.ipv4.ip_default_ttl = 64 net.ipv4.ip_forward = 0 net.ipv4.tcp_retrans_collapse = 1 net.ipv4.tcp_sack = 1 net.ipv4.tcp_window_scaling = 1 net.ipv4.tcp_timestamps = 1 net.core.hot_list_length = 128 net.core.optmem_max = 10240 net.core.message_burst = 50 net.core.message_cost = 5 net.core.mod_cong = 290 net.core.lo_cong = 100 net.core.no_cong = 20 net.core.no_cong_thresh = 20 net.core.netdev_max_backlog = 300 net.core.rmem_default = 65536 net.core.wmem_default = 65536 net.core.rmem_max = 8388608 net.core.wmem_max = 8388608 vm.static_inactive_target = 0 vm.max-readahead = 31 vm.min-readahead = 3 vm.max_map_count = 65536 vm.page-cluster = 4 vm.pagetable_cache = 25 50 vm.kswapd = 512 32 8 vm.pagecache = 2 50 75 vm.buffermem = 2 10 60 vm.overcommit_memory = 0 vm.bdflush = 30 64 64 256 500 3000 60 0 0 vm.freepages = 383 766 1149 kernel.prof_pid = -1 kernel.overflowgid = 65534 kernel.overflowuid = 65534 kernel.random.uuid = 5c1fa2bd-29c3-4ffd-a477-df629d38756d kernel.random.boot_id = 31e0b607-cf38-4971-a467-95ff8a5896cb kernel.random.write_wakeup_threshold = 128 kernel.random.read_wakeup_threshold = 8 kernel.random.entropy_avail = 0 kernel.random.poolsize = 512 kernel.threads-max = 2047 kernel.cad_pid = 1 kernel.sysrq = 0 kernel.sem = 250 32000 32 128 kernel.msgmnb = 16384 kernel.msgmni = 16 kernel.msgmax = 8192 kernel.shmmni = 4096 kernel.shmall = 2097152 kernel.shmmax = 33554432 kernel.rtsig-max = 1024 kernel.rtsig-nr = 1 kernel.acct = 4 2 30 kernel.hotplug = /sbin/hotplug kernel.modprobe = /sbin/modprobe kernel.printk = 6 4 1 7 kernel.ctrl-alt-del = 0 kernel.real-root-dev = 256 kernel.cap-bound = -257 kernel.tainted = 0 kernel.core_uses_pid = 0 kernel.panic = 0 kernel.domainname = (none) kernel.hostname = intranet kernel.version = #1 SMP Tue Feb 26 06:55:00 EST 2002 kernel.osrelease = 2.4.9-31smp kernel.ostype = Linux fs.jbd-oom-retry = 1 fs.lease-break-time = 45 fs.dir-notify-enable = 1 fs.leases-enable = 1 fs.overflowgid = 65534 fs.overflowuid = 65534 fs.dentry-state = 3314 2113 45 0 0 0 fs.dquot-nr = 0 0 fs.file-max = 8192 fs.file-nr = 2385 441 8192 fs.inode-state = 3041 1 0 0 0 0 0 fs.inode-nr = 3041 1 ---------------------------------------------------------------------For help using this (nmap-dev) mailing list, send a blank email to nmap-dev-help () insecure org . 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Current thread:
- "No buffer space available" when scanning a Class A or B net Bob McLaren (Mar 04)
- Re: "No buffer space available" when scanning a Class A or B net Curtis Doty (Mar 04)
- Re: "No buffer space available" when scanning a Class A or B net Bob McLaren (Mar 04)
- Re: "No buffer space available" when scanning a Class A or B net Bob McLaren (Mar 04)
- Re: "No buffer space available" when scanning a Class A or B net Bob McLaren (Mar 05)
- Re: "No buffer space available" when scanning a Class A or B net Curtis Doty (Mar 04)