[FUG-BR] Res: Re: ping: sendto: Operation not permitted

[Marcelo Gondim]

Em 14/10/2011 00:31, gianrubio em gmail.com escreveu:
> Pf ou ipfw?

Opa, to usando PF nele mas controlando só o acesso ao próprio Firewall 
porque como é provedor a gente não pode fazer bloqueios de forward para 
os clientes. Só usamos mesmo quando aparece algum ataque ou algo que 
precisamos conter. Fora isso drop nas portas usadas pelo windows e que 
os worms adoram. rsrsrrs

> Enviado pelo meu aparelho BlackBerry® da Vivo
>
> -----Original Message-----
> From: Marcelo Gondim<gondim em bsdinfo.com.br>
> Sender: freebsd-bounces em fug.com.br
> Date: Thu, 13 Oct 2011 22:59:02
> To: "Lista Brasileira de Discussão sobre Fre eBSD (FUG-BR)"<freebsd em fug.com.br>
> Reply-To: Lista Brasileira de Discussão sobre FreeBSD
> 	(FUG-BR)<freebsd em fug.com.br>
> Subject: Re: [FUG-BR] ping: sendto: Operation not permitted
>
> Em 13/10/2011 18:30, Rodrigo Mosconi escreveu:
>> Em 13 de outubro de 2011 17:02, Marcelo Gondim<gondim em bsdinfo.com.br>   escreveu:
>>> Pessoal,
>>>
>>> Hoje aconteceu algo estranho aqui no Firewall, algo que não havia
>>> percebido antes mas que pode estar relacionado com a falta de
>>> performance em algumas ocasiões.
>>> Do nada o acesso aos servidores ficaram com muita perda e todos eles
>>> passam pelo Firewall. Envio e consulta de e-mails travando e tal.
>>>
>>> Quando me loguei no Firewall e tentei pingar alguns lugares tanto
>>> externos quanto na minha própria rede local algumas vezes pingava e
>>> outras aparecia a mensagem abaixo:
>>>
>>> ping: sendto: Operation not permitted
>>>
>>> Essa mensagem aparecia algumas vezes como resposta do ping e logo em
>>> seguida continuava à pingar normal.
>>>
>>> Não vi nada no dmesg e nem no messages relacionado à esse problema e
>>> procurando na sysctl não vi nenhum limite no icmp:
>>>
>>> (root em seca)[~]# sysctl -a|grep icmp
>>> net.inet.icmp.maskrepl: 0
>>> net.inet.icmp.icmplim: 0
>>> net.inet.icmp.bmcastecho: 0
>>> net.inet.icmp.quotelen: 8
>>> net.inet.icmp.reply_from_interface: 0
>>> net.inet.icmp.reply_src:
>>> net.inet.icmp.icmplim_output: 0
>>> net.inet.icmp.log_redirect: 0
>>> net.inet.icmp.drop_redirect: 1
>>> net.inet.icmp.maskfake: 0
>>> net.inet.tcp.icmp_may_rst: 1
>>> net.inet6.icmp6.rediraccept: 1
>>> net.inet6.icmp6.redirtimeout: 600
>>> net.inet6.icmp6.nd6_prune: 1
>>> net.inet6.icmp6.nd6_delay: 5
>>> net.inet6.icmp6.nd6_umaxtries: 3
>>> net.inet6.icmp6.nd6_mmaxtries: 3
>>> net.inet6.icmp6.nd6_useloopback: 1
>>> net.inet6.icmp6.nodeinfo: 3
>>> net.inet6.icmp6.errppslimit: 100
>>> net.inet6.icmp6.nd6_maxnudhint: 0
>>> net.inet6.icmp6.nd6_debug: 0
>>> net.inet6.icmp6.nd6_maxqueuelen: 1
>>> net.inet6.icmp6.nd6_onlink_ns_rfc4861: 0
>>>
>>> Tentei no google e achei algumas coisas vagas relacionadas ao PF. O fato
>>> é que após um reboot do Firewall tudo normalizou.
>>> Alguém tem alguma idéia? O estranho é que o sistema se desestabilizou
>>> todo e só com um reboot que voltou à funcionar. Depois vi que podia ter
>>> feito um disable no PF pra ver se ele era o causador mas já havia
>>> re-iniciado o sistema. Próxima vez tentarei isso antes.
>>>
>>> []´s à todos
>>> -------------------------
>>> Histórico: http://www.fug.com.br/historico/html/freebsd/
>>> Sair da lista: https://www.fug.com.br/mailman/listinfo/freebsd
>>>
>> sysctl net.inet?
>>
> Opa Rodrigo,
>
> O tráfego nesse Firewall é de 160 à 200Mbps. O Firewall está stateless
> no forward dos pacotes.
>
> net.inet.ip.portrange.randomtime: 45
> net.inet.ip.portrange.randomcps: 10
> net.inet.ip.portrange.randomized: 1
> net.inet.ip.portrange.reservedlow: 0
> net.inet.ip.portrange.reservedhigh: 1023
> net.inet.ip.portrange.hilast: 65535
> net.inet.ip.portrange.hifirst: 49152
> net.inet.ip.portrange.last: 65535
> net.inet.ip.portrange.first: 10000
> net.inet.ip.portrange.lowlast: 600
> net.inet.ip.portrange.lowfirst: 1023
> net.inet.ip.forwarding: 1
> net.inet.ip.redirect: 0
> net.inet.ip.ttl: 64
> net.inet.ip.rtexpire: 3600
> net.inet.ip.rtminexpire: 10
> net.inet.ip.rtmaxcache: 128
> net.inet.ip.sourceroute: 0
> net.inet.ip.intr_queue_maxlen: 256
> net.inet.ip.intr_queue_drops: 0
> net.inet.ip.accept_sourceroute: 0
> net.inet.ip.keepfaith: 0
> net.inet.ip.gifttl: 30
> net.inet.ip.same_prefix_carp_only: 0
> net.inet.ip.subnets_are_local: 0
> net.inet.ip.random_id_total: 0
> net.inet.ip.random_id_collisions: 0
> net.inet.ip.random_id_period: 8192
> net.inet.ip.mcast.loop: 1
> net.inet.ip.mcast.maxsocksrc: 128
> net.inet.ip.mcast.maxgrpsrc: 512
> net.inet.ip.dummynet.io_pkt_drop: 0
> net.inet.ip.dummynet.io_pkt_fast: 0
> net.inet.ip.dummynet.io_pkt: 0
> net.inet.ip.dummynet.queue_count: 0
> net.inet.ip.dummynet.fsk_count: 0
> net.inet.ip.dummynet.si_count: 0
> net.inet.ip.dummynet.schk_count: 0
> net.inet.ip.dummynet.tick_lost: 0
> net.inet.ip.dummynet.tick_diff: -1704
> net.inet.ip.dummynet.tick_adjustment: 47142177
> net.inet.ip.dummynet.tick_delta_sum: 84
> net.inet.ip.dummynet.tick_delta: 666
> net.inet.ip.dummynet.red_max_pkt_size: 1500
> net.inet.ip.dummynet.red_avg_pkt_size: 512
> net.inet.ip.dummynet.red_lookup_depth: 256
> net.inet.ip.dummynet.expire_cycle: 0
> net.inet.ip.dummynet.expire: 1
> net.inet.ip.dummynet.debug: 0
> net.inet.ip.dummynet.io_fast: 0
> net.inet.ip.dummynet.pipe_byte_limit: 1048576
> net.inet.ip.dummynet.pipe_slot_limit: 100
> net.inet.ip.dummynet.hash_size: 64
> net.inet.ip.fastforwarding: 1
> net.inet.ip.fw.static_count: 1
> net.inet.ip.fw.default_to_accept: 1
> net.inet.ip.fw.tables_max: 128
> net.inet.ip.fw.default_rule: 65535
> net.inet.ip.fw.verbose_limit: 100
> net.inet.ip.fw.verbose: 1
> net.inet.ip.fw.autoinc_step: 100
> net.inet.ip.fw.one_pass: 1
> net.inet.ip.fw.dyn_keepalive: 1
> net.inet.ip.fw.dyn_short_lifetime: 10
> net.inet.ip.fw.dyn_udp_lifetime: 10
> net.inet.ip.fw.dyn_rst_lifetime: 1
> net.inet.ip.fw.dyn_fin_lifetime: 2
> net.inet.ip.fw.dyn_syn_lifetime: 10
> net.inet.ip.fw.dyn_ack_lifetime: 120
> net.inet.ip.fw.dyn_max: 65536
> net.inet.ip.fw.dyn_count: 0
> net.inet.ip.fw.curr_dyn_buckets: 256
> net.inet.ip.fw.dyn_buckets: 65536
> net.inet.ip.fw.enable: 1
> net.inet.ip.maxfragpackets: 2080
> net.inet.ip.stealth: 0
> net.inet.ip.maxfragsperpacket: 16
> net.inet.ip.fragpackets: 1
> net.inet.ip.check_interface: 0
> net.inet.ip.random_id: 0
> net.inet.ip.sendsourcequench: 0
> net.inet.ip.process_options: 1
> net.inet.ip.alias.sctp.track_global_addresses: 0
> net.inet.ip.alias.sctp.param_proc_limit: 25
> net.inet.ip.alias.sctp.chunk_proc_limit: 5
> net.inet.ip.alias.sctp.initialising_chunk_proc_limit: 2
> net.inet.ip.alias.sctp.accept_global_ootb_addip: 0
> net.inet.ip.alias.sctp.error_on_ootb: 1
> net.inet.ip.alias.sctp.hashtable_size: 2003
> net.inet.ip.alias.sctp.holddown_timer: 0
> net.inet.ip.alias.sctp.shutdown_timer: 15
> net.inet.ip.alias.sctp.up_timer: 300
> net.inet.ip.alias.sctp.init_timer: 15
> net.inet.ip.alias.sctp.log_level: 0
> net.inet.icmp.maskrepl: 0
> net.inet.icmp.icmplim: 0
> net.inet.icmp.bmcastecho: 0
> net.inet.icmp.quotelen: 8
> net.inet.icmp.reply_from_interface: 0
> net.inet.icmp.reply_src:
> net.inet.icmp.icmplim_output: 0
> net.inet.icmp.log_redirect: 0
> net.inet.icmp.drop_redirect: 1
> net.inet.icmp.maskfake: 0
> net.inet.igmp.gsrdelay: 10
> net.inet.igmp.default_version: 3
> net.inet.igmp.legacysupp: 0
> net.inet.igmp.v2enable: 1
> net.inet.igmp.v1enable: 1
> net.inet.igmp.sendlocal: 1
> net.inet.igmp.sendra: 1
> net.inet.igmp.recvifkludge: 1
> net.inet.ipip.ipip_allow: 0
> net.inet.tcp.rfc1323: 1
> net.inet.tcp.mssdflt: 512
> net.inet.tcp.keepidle: 7200000
> net.inet.tcp.keepintvl: 75000
> net.inet.tcp.sendspace: 32768
> net.inet.tcp.recvspace: 65536
> net.inet.tcp.keepinit: 75000
> net.inet.tcp.delacktime: 100
> net.inet.tcp.v6mssdflt: 1024
> net.inet.tcp.hostcache.purge: 0
> net.inet.tcp.hostcache.prune: 300
> net.inet.tcp.hostcache.expire: 3600
> net.inet.tcp.hostcache.count: 14
> net.inet.tcp.hostcache.bucketlimit: 30
> net.inet.tcp.hostcache.hashsize: 512
> net.inet.tcp.hostcache.cachelimit: 15360
> net.inet.tcp.read_locking: 1
> net.inet.tcp.recvbuf_max: 262144
> net.inet.tcp.recvbuf_inc: 16384
> net.inet.tcp.recvbuf_auto: 1
> net.inet.tcp.insecure_rst: 0
> net.inet.tcp.ecn.maxretries: 1
> net.inet.tcp.ecn.enable: 0
> net.inet.tcp.abc_l_var: 2
> net.inet.tcp.rfc3465: 1
> net.inet.tcp.rfc3390: 1
> net.inet.tcp.rfc3042: 1
> net.inet.tcp.drop_synfin: 1
> net.inet.tcp.delayed_ack: 1
> net.inet.tcp.blackhole: 0
> net.inet.tcp.log_in_vain: 0
> net.inet.tcp.sendbuf_max: 262144
> net.inet.tcp.sendbuf_inc: 8192
> net.inet.tcp.sendbuf_auto: 1
> net.inet.tcp.tso: 1
> net.inet.tcp.newreno: 1
> net.inet.tcp.local_slowstart_flightsize: 4
> net.inet.tcp.slowstart_flightsize: 1
> net.inet.tcp.path_mtu_discovery: 1
> net.inet.tcp.reass.overflows: 0
> net.inet.tcp.reass.cursegments: 0
> net.inet.tcp.reass.maxsegments: 4200
> net.inet.tcp.sack.globalholes: 0
> net.inet.tcp.sack.globalmaxholes: 65536
> net.inet.tcp.sack.maxholes: 128
> net.inet.tcp.sack.enable: 1
> net.inet.tcp.signature_verify_input: 1
> net.inet.tcp.inflight.stab: 20
> net.inet.tcp.inflight.max: 1073725440
> net.inet.tcp.inflight.min: 6144
> net.inet.tcp.inflight.rttthresh: 10
> net.inet.tcp.inflight.debug: 0
> net.inet.tcp.inflight.enable: 0
> net.inet.tcp.isn_reseed_interval: 0
> net.inet.tcp.icmp_may_rst: 1
> net.inet.tcp.pcbcount: 16
> net.inet.tcp.do_tcpdrain: 1
> net.inet.tcp.tcbhashsize: 512
> net.inet.tcp.log_debug: 0
> net.inet.tcp.minmss: 216
> net.inet.tcp.syncache.rst_on_sock_fail: 1
> net.inet.tcp.syncache.rexmtlimit: 3
> net.inet.tcp.syncache.hashsize: 512
> net.inet.tcp.syncache.count: 0
> net.inet.tcp.syncache.cachelimit: 15360
> net.inet.tcp.syncache.bucketlimit: 30
> net.inet.tcp.syncookies_only: 0
> net.inet.tcp.syncookies: 1
> net.inet.tcp.timer_race: 0
> net.inet.tcp.finwait2_timeout: 60000
> net.inet.tcp.fast_finwait2_recycle: 0
> net.inet.tcp.always_keepalive: 1
> net.inet.tcp.rexmit_slop: 200
> net.inet.tcp.rexmit_min: 30
> net.inet.tcp.msl: 3000
> net.inet.tcp.nolocaltimewait: 0
> net.inet.tcp.maxtcptw: 13312
> net.inet.udp.checksum: 1
> net.inet.udp.maxdgram: 9216
> net.inet.udp.recvspace: 42080
> net.inet.udp.blackhole: 0
> net.inet.udp.log_in_vain: 0
> net.inet.esp.esp_enable: 1
> net.inet.ah.ah_cleartos: 1
> net.inet.ah.ah_enable: 1
> net.inet.ipcomp.ipcomp_enable: 1
> net.inet.carp.allow: 1
> net.inet.carp.preempt: 0
> net.inet.carp.log: 1
> net.inet.carp.arpbalance: 0
> net.inet.carp.suppress_preempt: 0
> net.inet.ipsec.def_policy: 1
> net.inet.ipsec.esp_trans_deflev: 1
> net.inet.ipsec.esp_net_deflev: 1
> net.inet.ipsec.ah_trans_deflev: 1
> net.inet.ipsec.ah_net_deflev: 1
> net.inet.ipsec.ah_cleartos: 1
> net.inet.ipsec.ah_offsetmask: 0
> net.inet.ipsec.dfbit: 0
> net.inet.ipsec.ecn: 0
> net.inet.ipsec.debug: 0
> net.inet.ipsec.filtertunnel: 0
> net.inet.ipsec.crypto_support: 50331648
> net.inet.raw.recvspace: 9216
> net.inet.raw.maxdgram: 9216
> net.inet.accf.unloadable: 0
> net.inet.accf.http.parsehttpversion: 1
>