> On 17 Sep 2020, at 19:29, Venkat <venkat.dabb...@gmail.com> wrote: > > > Andrew, > > I have a few follow up questions on the stated behavior. > > 1. Does the behavior you outlined about hitting special-case "-1" entries > apply to UDP traffic as well if the ACL rule is stateful?
Yup. > > 2. What happens when ACL config is modified while traffic is flowing? Would > the packets continue to hit the special-case "-1" session until the session > is timed out and re-claimed? If that's true, then packets would continue to > sneak through even when a user modifies the ACL from Permit+Reflect to Deny. Yep. You can look at the code, there is a debug CLI tweak to reclassify sessions, but I am not sure anyone actually uses it. There is no “always right” answer to this ~20 year old question. ACL plugin is very explicitly not a “fancy firewall”. > > 3. And regarding the special-case "-1" lookups, I assume a stateful ACL hit > would result in the creation of such a session and subsequent packets would > by-pass ACL rules and continue to be served by special-case "-1". ...as your have observed it. The return packets on that interface matching the same five tuple, too. —a > > > thanks > Venkat > > >> On Tue, Sep 15, 2020 at 2:01 AM Andrew 👽 Yourtchenko <ayour...@gmail.com> >> wrote: >> Hi Venkat, >> >> Before doing ACL checks, acl-plugin checks the establshed sessions on >> the given interface. >> >> If an already established session is hit the action is set to "3" and >> no further ACL check is done, which is what you see in your output. >> >> For that case, the ACL# in the trace is a special-case "-1", same as >> lc_index-1 - because we actually never get it to ACL lookup so do not >> need it; and the rule# is the session index; and the trace_bits tells >> us that this session is classifed to use timeout type "3", which is >> defined in acl_timeout_e as "ACL_TIMEOUT_TCP_TRANSIENT" - which makes >> sense, since you are sending the packets in one direction and thus the >> session never establishes and the timeout type never changes to >> "TCP_IDLE". >> >> Of the packets you sent in total, 15002 packets had hit the ACL#3 >> rule and caused the sessions to be created. The rest of the packets >> had hit the established session entries and this is one of those that >> you have captured. >> >> At the time of taking the outputs the traffic was stopped and the >> sessions were deleted by idle timeout (which for the transient state >> is short). >> >> Does this make sense ? >> >> --a >> >> >> >> >> On 9/14/20, Venkat <venkat.dabb...@gmail.com> wrote: >> > Hello Andrew, >> > >> > I am doing a simple test by sending TCP flows from Trex traffic generator. >> > Traffic source is 16.0.0.1-16.0.0.100 and destination is >> > 48.0.0.1-48.0.0.100. >> > I am sending TCP traffic with CPS=50 from 100 clients to 100 servers via >> > Trex http profile. >> > >> > I have a reflective ACL to permit the flow for the above src and dst. >> > I expect the packet to hit acl index 3 rule 0 and get permitted. >> > However, I see the following match in the packet trace which doesn't seem >> > like it is hitting acl index 3 and rule 0 but hitting some other acl index >> > (acl -1 and lc_index -1). >> > What is the behavior here? Please provide some context here.. >> > >> > 03:47:03:874624: acl-plugin-in-ip4-fa >> > >> > acl-plugin: lc_index: -1, sw_if_index 1, next index 1, action: 3, match: >> > acl >> > -1 rule 13309 trace_bits 80010303 >> > >> > pkt info 0000000000000000 0000000000000000 0000000000000000 >> > 4300003043000010 >> > 0001010600502d14 0310ffff00000000 >> > >> > lc_index 0 l3 ip4 16.0.0.67 -> 48.0.0.67 l4 lsb_of_sw_if_index 1 proto 6 >> > l4_is_input 1 l4_slow_path 0 l4_flags 0x01 port 11540 -> 80 tcp flags >> > (valid) 10 rsvd 0 >> > >> > DBGvpp# show acl-plugin acl >> > >> > acl-index 0 count 2 tag >> > {99998-sra-inbound-sasefwpro-nags-explicit-deny-99998} >> > >> > 0: ipv4 deny src 0.0.0.0/0 dst 0.0.0.0/0 proto 0 sport 0 dport 0 >> > >> > 1: ipv6 deny src ::/0 dst ::/0 proto 0 sport 0 dport 0 >> > >> > applied inbound on sw_if_index: 1 >> > >> > applied outbound on sw_if_index: >> > >> > used in lookup context index: 1 >> > >> > acl-index 1 count 6 tag >> > {99999-sra-inbound-sasefwpro-sase-default-fw-profile} >> > >> > 0: ipv4 permit+reflect src 0.0.0.0/0 dst 0.0.0.0/0 proto 6 sport 0-65535 >> > dport 0-65535 >> > >> > 1: ipv6 permit+reflect src ::/0 dst ::/0 proto 6 sport 0-65535 dport >> > 0-65535 >> > >> > 2: ipv4 permit+reflect src 0.0.0.0/0 dst 0.0.0.0/0 proto 17 sport 0-65535 >> > dport 0-65535 >> > >> > 3: ipv6 permit+reflect src ::/0 dst ::/0 proto 17 sport 0-65535 dport >> > 0-65535 >> > >> > 4: ipv4 permit+reflect src 0.0.0.0/0 dst 0.0.0.0/0 proto 1 sport 0-65535 >> > dport 0-65535 >> > >> > 5: ipv4 permit+reflect src 0.0.0.0/0 dst 0.0.0.0/0 proto 1 sport 0-65535 >> > dport 0-65535 >> > >> > applied inbound on sw_if_index: 1 >> > >> > applied outbound on sw_if_index: >> > >> > used in lookup context index: 1 >> > >> > acl-index 2 count 6 tag >> > {99999-sra-outbound-sasefwpro-sase-default-fw-profile} >> > >> > 0: ipv4 deny src 0.0.0.0/0 dst 0.0.0.0/0 proto 6 sport 0-65535 dport >> > 0-65535 >> > >> > 1: ipv6 deny src ::/0 dst ::/0 proto 6 sport 0-65535 dport 0-65535 >> > >> > 2: ipv4 deny src 0.0.0.0/0 dst 0.0.0.0/0 proto 17 sport 0-65535 dport >> > 0-65535 >> > >> > 3: ipv6 deny src ::/0 dst ::/0 proto 17 sport 0-65535 dport 0-65535 >> > >> > 4: ipv4 deny src 0.0.0.0/0 dst 0.0.0.0/0 proto 1 sport 0-65535 dport >> > 0-65535 >> > >> > 5: ipv4 deny src 0.0.0.0/0 dst 0.0.0.0/0 proto 1 sport 0-65535 dport >> > 0-65535 >> > >> > applied inbound on sw_if_index: >> > >> > applied outbound on sw_if_index: 1 >> > >> > used in lookup context index: 0 >> > >> > acl-index 3 count 1 tag {100-allow-48} >> > >> > 0: ipv4 permit+reflect src 16.0.0.0/16 dst 48.0.0.0/16 proto 0 sport 0 >> > dport >> > 0 >> > >> > applied inbound on sw_if_index: 1 >> > >> > used in lookup context index: 1 >> > >> > DBGvpp# >> > >> > DBGvpp# show acl-plugin tables >> > >> > Stats counters enabled for interface ACLs: 0 >> > >> > Mask-type entries: >> > >> > 0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> > 0000000000000000 0800ffffffffffff refcount 4 >> > >> > 1: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> > 000000ff00000000 0e00ffffffffffff refcount 24 >> > >> > 2: 0000000000000000 0000000000000000 0000000000000000 0000ffff0000ffff >> > 0000000000000000 0800ffffffffffff refcount 2 >> > >> > Mask-ready ACL representations >> > >> > acl-index 0 bitmask-ready layout >> > >> > applied lc_index list: 1 >> > >> > 0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> > 0000000000000000 0000000000000000 base mask index 0 acl 0 rule 0 action 0 >> > >> > 1: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> > 0000000000000000 0800000000000000 base mask index 0 acl 0 rule 1 action 0 >> > >> > acl-index 1 bitmask-ready layout >> > >> > applied lc_index list: 1 >> > >> > 0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> > 0000000600000000 0200000100000000 base mask index 1 acl 1 rule 0 action 2 >> > >> > 1: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> > 0000000600000000 0a00000100000000 base mask index 1 acl 1 rule 1 action 2 >> > >> > 2: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> > 0000001100000000 0200000100000000 base mask index 1 acl 1 rule 2 action 2 >> > >> > 3: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> > 0000001100000000 0a00000100000000 base mask index 1 acl 1 rule 3 action 2 >> > >> > 4: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> > 0000000100000000 0200000100000000 base mask index 1 acl 1 rule 4 action 2 >> > >> > 5: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> > 0000000100000000 0200000100000000 base mask index 1 acl 1 rule 5 action 2 >> > >> > acl-index 2 bitmask-ready layout >> > >> > applied lc_index list: 0 >> > >> > 0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> > 0000000600000000 0200000100000000 base mask index 1 acl 2 rule 0 action 0 >> > >> > 1: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> > 0000000600000000 0a00000100000000 base mask index 1 acl 2 rule 1 action 0 >> > >> > 2: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> > 0000001100000000 0200000100000000 base mask index 1 acl 2 rule 2 action 0 >> > >> > 3: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> > 0000001100000000 0a00000100000000 base mask index 1 acl 2 rule 3 action 0 >> > >> > 4: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> > 0000000100000000 0200000100000000 base mask index 1 acl 2 rule 4 action 0 >> > >> > 5: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> > 0000000100000000 0200000100000000 base mask index 1 acl 2 rule 5 action 0 >> > >> > acl-index 3 bitmask-ready layout >> > >> > applied lc_index list: 1 >> > >> > 0: 0000000000000000 0000000000000000 0000000000000000 0000003000000010 >> > 0000000000000000 0000000200000000 base mask index 2 acl 3 rule 0 action 2 >> > >> > Applied lookup entries for lookup contexts >> > >> > lc_index 0: >> > >> > applied acls: 2 >> > >> > applied mask info entries: >> > >> > 0: mask type index 1 first rule index 0 num_entries 6 max_collisions 2 >> > >> > lookup applied entries: >> > >> > 0: acl 2 rule 0 action 0 bitmask-ready rule 0 mask type index: 1 >> > colliding_rules: 1 collision_head_ae_idx 0 hitcount 0 acl_pos: 0 >> > >> > 0: acl 2 ace 0 acl pos 0 pae index: 0 >> > >> > 1: acl 2 rule 1 action 0 bitmask-ready rule 1 mask type index: 1 >> > colliding_rules: 1 collision_head_ae_idx 1 hitcount 0 acl_pos: 0 >> > >> > 0: acl 2 ace 1 acl pos 0 pae index: 1 >> > >> > 2: acl 2 rule 2 action 0 bitmask-ready rule 2 mask type index: 1 >> > colliding_rules: 1 collision_head_ae_idx 2 hitcount 0 acl_pos: 0 >> > >> > 0: acl 2 ace 2 acl pos 0 pae index: 2 >> > >> > 3: acl 2 rule 3 action 0 bitmask-ready rule 3 mask type index: 1 >> > colliding_rules: 1 collision_head_ae_idx 3 hitcount 0 acl_pos: 0 >> > >> > 0: acl 2 ace 3 acl pos 0 pae index: 3 >> > >> > 4: acl 2 rule 4 action 0 bitmask-ready rule 4 mask type index: 1 >> > colliding_rules: 2 collision_head_ae_idx 4 hitcount 0 acl_pos: 0 >> > >> > 0: acl 2 ace 4 acl pos 0 pae index: 4 >> > >> > 1: acl 2 ace 5 acl pos 0 pae index: 5 >> > >> > 5: acl 2 rule 5 action 0 bitmask-ready rule 5 mask type index: 1 >> > colliding_rules: 0 collision_head_ae_idx 4 hitcount 0 acl_pos: 0 >> > >> > lc_index 1: >> > >> > applied acls: 3, 0, 1 >> > >> > applied mask info entries: >> > >> > 0: mask type index 2 first rule index 0 num_entries 1 max_collisions 1 >> > >> > 1: mask type index 0 first rule index 1 num_entries 2 max_collisions 1 >> > >> > 2: mask type index 1 first rule index 3 num_entries 6 max_collisions 2 >> > >> > lookup applied entries: >> > >> > 0: acl 3 rule 0 action 2 bitmask-ready rule 0 mask type index: 2 >> > colliding_rules: 1 collision_head_ae_idx 0 hitcount 150001 acl_pos: 0 >> > >> > 0: acl 3 ace 0 acl pos 0 pae index: 0 >> > >> > 1: acl 0 rule 0 action 0 bitmask-ready rule 0 mask type index: 0 >> > colliding_rules: 1 collision_head_ae_idx 1 hitcount 0 acl_pos: 1 >> > >> > 0: acl 0 ace 0 acl pos 1 pae index: 1 >> > >> > 2: acl 0 rule 1 action 0 bitmask-ready rule 1 mask type index: 0 >> > colliding_rules: 1 collision_head_ae_idx 2 hitcount 0 acl_pos: 1 >> > >> > 0: acl 0 ace 1 acl pos 1 pae index: 2 >> > >> > 3: acl 1 rule 0 action 2 bitmask-ready rule 0 mask type index: 1 >> > colliding_rules: 1 collision_head_ae_idx 3 hitcount 0 acl_pos: 2 >> > >> > 0: acl 1 ace 0 acl pos 2 pae index: 3 >> > >> > 4: acl 1 rule 1 action 2 bitmask-ready rule 1 mask type index: 1 >> > colliding_rules: 1 collision_head_ae_idx 4 hitcount 0 acl_pos: 2 >> > >> > 0: acl 1 ace 1 acl pos 2 pae index: 4 >> > >> > 5: acl 1 rule 2 action 2 bitmask-ready rule 2 mask type index: 1 >> > colliding_rules: 1 collision_head_ae_idx 5 hitcount 0 acl_pos: 2 >> > >> > 0: acl 1 ace 2 acl pos 2 pae index: 5 >> > >> > 6: acl 1 rule 3 action 2 bitmask-ready rule 3 mask type index: 1 >> > colliding_rules: 1 collision_head_ae_idx 6 hitcount 0 acl_pos: 2 >> > >> > 0: acl 1 ace 3 acl pos 2 pae index: 6 >> > >> > 7: acl 1 rule 4 action 2 bitmask-ready rule 4 mask type index: 1 >> > colliding_rules: 2 collision_head_ae_idx 7 hitcount 0 acl_pos: 2 >> > >> > 0: acl 1 ace 4 acl pos 2 pae index: 7 >> > >> > 1: acl 1 ace 5 acl pos 2 pae index: 8 >> > >> > 8: acl 1 rule 5 action 2 bitmask-ready rule 5 mask type index: 1 >> > colliding_rules: 0 collision_head_ae_idx 7 hitcount 0 acl_pos: 2 >> > >> > ACL lookup hash table: >> > >> > Hash table ACL plugin rule lookup bihash >> > >> > 13 active elements 13 active buckets >> > >> > 1 free lists >> > >> > 0 linear search buckets >> > >> > arena: base 7f7377ff0000, next 80d00 >> > >> > used 527616 b (0 Mbytes) of 67108864 b (64 Mbytes) >> > >> > DBGvpp# show acl-plugin sessions >> > >> > Sessions total: add 150002 - del 150002 = 0 >> > >> > Sessions active: add 150002 - deact 150002 = 0 >> > >> > Sessions being purged: deact 150002 - del 150002 = 0 >> > >> > now: 38259162493998 clocks per second: 2500000000 >> > >> > Per-thread data: >> > >> > Thread #0: >> > >> > connection add/del stats: >> > >> > sw_if_index 0: add 0 - del 0 = 0; epoch chg: 0 >> > >> > sw_if_index 1: add 150002 - del 150002 = 0; epoch chg: 0 >> > >> > sw_if_index 2: add 0 - del 0 = 0; epoch chg: 0 >> > >> > sw_if_index 3: add 0 - del 0 = 0; epoch chg: 0 >> > >> > sw_if_index 4: add 0 - del 0 = 0; epoch chg: 0 >> > >> > sw_if_index 5: add 0 - del 0 = 0; epoch chg: 0 >> > >> > sw_if_index 6: add 0 - del 0 = 0; epoch chg: 0 >> > >> > sw_if_index 7: add 0 - del 0 = 0; epoch chg: 0 >> > >> > sw_if_index 8: add 0 - del 0 = 0; epoch chg: 0 >> > >> > sw_if_index 9: add 0 - del 0 = 0; epoch chg: 0 >> > >> > connection timeout type lists: >> > >> > fa_conn_list_head[0]: -1 >> > >> > fa_conn_list_head[1]: -1 >> > >> > fa_conn_list_head[2]: -1 >> > >> > fa_conn_list_head[3]: -1 >> > >> > fa_conn_list_head[4]: -1 >> > >> > Next expiry time: 0 >> > >> > Requeue until time: 0 >> > >> > Current time wait interval: 0 >> > >> > Count of deleted sessions: 150002 >> > >> > Delete already deleted: 0 >> > >> > Session timers restarted: 150750 >> > >> > Swipe until this time: 0 >> > >> > sw_if_index serviced bitmap: 2 >> > >> > pending clear intfc bitmap : >> > >> > clear in progress: 0 >> > >> > interrupt is pending: 0 >> > >> > interrupt is needed: 0 >> > >> > interrupt is unwanted: 0 >> > >> > interrupt generation: 14572 >> > >> > received session change requests: 0 >> > >> > sent session change requests: 0 >> > >> > Conn cleaner thread counters: >> > >> > 33: delete_by_sw_index events >> > >> > 30: delete_by_sw_index handled ok >> > >> > 0: unknown events received >> > >> > 0: session idle timers restarted >> > >> > 14567: event wait with timeout called >> > >> > 5: event wait w/o timeout called >> > >> > 14571: total event cycles >> > >> > Interrupt generation: 14572 >> > >> > Sessions per interval: min 1 max 100 increment: 100 ms current: 500 ms >> > >> > Reclassify sessions: 0 >> > >> > IPv6 Session lookup hash table: >> > >> > Hash table ACL plugin FA IPv6 session bihash >> > >> > [empty, uninitialized] >> > >> > IPv4 Session lookup hash table: >> > >> > Hash table ACL plugin FA IPv4 session bihash >> > >> > 0 active elements 0 active buckets >> > >> > 5 free lists >> > >> > [len 1] 51199 free elts >> > >> > [len 2] 4504 free elts >> > >> > [len 4] 373 free elts >> > >> > [len 8] 9 free elts >> > >> > [len 16] 1 free elts >> > >> > 0 linear search buckets >> > >> > arena: base 7f5abb720000, next 7b84c0 >> > >> > used 8094912 b (7 Mbytes) of 1073741824 b (1024 Mbytes) >> > >> > DBGvpp# show nat44 addresses >> > >> > NAT44 pool addresses: >> > >> > 172.24.114.39 >> > >> > tenant VRF independent >> > >> > 0 busy udp ports >> > >> > 15001 busy tcp ports >> > >> > 0 busy icmp ports >> > >> > NAT44 twice-nat pool addresses: >> > >> > 10.40.1.254 >> > >> > tenant VRF independent >> > >> > 0 busy udp ports >> > >> > 0 busy tcp ports >> > >> > 0 busy icmp ports >> > >> > DBGvpp# >> > >> > Packet 50 >> > >> > 03:47:03:874592: dpdk-input >> > >> > lan-ens6 rx queue 0 >> > >> > buffer 0x8b222: current data 0, length 54, buffer-pool 0, ref-count 1, >> > totlen-nifb 0, trace handle 0x31 >> > >> > ext-hdr-valid >> > >> > l4-cksum-computed l4-cksum-correct >> > >> > PKT MBUF: port 0, nb_segs 1, pkt_len 54 >> > >> > buf_len 2176, data_len 54, ol_flags 0x0, data_off 128, phys_addr 0x6fec8900 >> > >> > packet_type 0x110 l2_len 0 l3_len 0 outer_l2_len 0 outer_l3_len 0 >> > >> > rss 0x3aa73aa7 fdir.hi 0x0 fdir.lo 0x3aa73aa7 >> > >> > Packet Types >> > >> > RTE_PTYPE_L3_IPV4 (0x0010) IPv4 packet without extension headers >> > >> > RTE_PTYPE_L4_TCP (0x0100) TCP packet >> > >> > IP4: 02:85:36:20:e4:87 -> 02:2e:53:e6:4f:e1 >> > >> > TCP: 16.0.0.67 -> 48.0.0.67 >> > >> > tos 0x00, ttl 128, length 40, checksum 0x80f9 >> > >> > fragment id 0x7951 >> > >> > TCP: 11540 -> 80 >> > >> > seq. 0x181a45db ack 0x181af226 >> > >> > flags 0x10 ACK, tcp header: 20 bytes >> > >> > window 32768, checksum 0x59b4 >> > >> > 03:47:03:874606: ethernet-input >> > >> > frame: flags 0x3, hw-if-index 1, sw-if-index 1 >> > >> > IP4: 02:85:36:20:e4:87 -> 02:2e:53:e6:4f:e1 >> > >> > 03:47:03:874620: ip4-input-no-checksum >> > >> > TCP: 16.0.0.67 -> 48.0.0.67 >> > >> > tos 0x00, ttl 128, length 40, checksum 0x80f9 >> > >> > fragment id 0x7951 >> > >> > TCP: 11540 -> 80 >> > >> > seq. 0x181a45db ack 0x181af226 >> > >> > flags 0x10 ACK, tcp header: 20 bytes >> > >> > window 32768, checksum 0x59b4 >> > >> > 03:47:03:874624: acl-plugin-in-ip4-fa >> > >> > acl-plugin: lc_index: -1, sw_if_index 1, next index 1, action: 3, match: >> > acl >> > -1 rule 13309 trace_bits 80010303 >> > >> > pkt info 0000000000000000 0000000000000000 0000000000000000 >> > 4300003043000010 >> > 0001010600502d14 0310ffff00000000 >> > >> > lc_index 0 l3 ip4 16.0.0.67 -> 48.0.0.67 l4 lsb_of_sw_if_index 1 proto 6 >> > l4_is_input 1 l4_slow_path 0 l4_flags 0x01 port 11540 -> 80 tcp flags >> > (valid) 10 rsvd 0 >> > >> > 03:47:03:874634: ip4-lookup >> > >> > fib 0 dpo-idx 53 flow hash: 0x00000000 >> > >> > TCP: 16.0.0.67 -> 48.0.0.67 >> > >> > tos 0x00, ttl 128, length 40, checksum 0x80f9 >> > >> > fragment id 0x7951 >> > >> > TCP: 11540 -> 80 >> > >> > seq. 0x181a45db ack 0x181af226 >> > >> > flags 0x10 ACK, tcp header: 20 bytes >> > >> > window 32768, checksum 0x59b4 >> > >> > 03:47:03:874639: ip4-load-balance >> > >> > fib 0 dpo-idx 14 flow hash: 0x00000000 >> > >> > TCP: 16.0.0.67 -> 48.0.0.67 >> > >> > tos 0x00, ttl 128, length 40, checksum 0x80f9 >> > >> > fragment id 0x7951 >> > >> > TCP: 11540 -> 80 >> > >> > seq. 0x181a45db ack 0x181af226 >> > >> > flags 0x10 ACK, tcp header: 20 bytes >> > >> > window 32768, checksum 0x59b4 >> > >> > 03:47:03:874655: ip4-rewrite >> > >> > tx_sw_if_index 2 dpo-idx 14 : ipv4 via 172.24.115.166 wan-ens7: mtu:9000 >> > 02fcbaad303302c6e54357a50800 flow hash: 0x00000000 >> > >> > 00000000: 02fcbaad303302c6e54357a5080045000028795100007f0681f9100000433000 >> > >> > 00000020: 00432d140050181a45db181af2265010800059b400002a2a2a2a2a2a >> > >> > 03:47:03:874660: nat44-ed-in2out-output >> > >> > NAT44_IN2OUT_ED_FAST_PATH: sw_if_index 1, next index 0, session 34066 >> > >> > 03:47:03:874681: wan-ens7-output >> > >> > wan-ens7 l4-cksum-computed l4-cksum-correct natted l2_hdr_offset_valid >> > l3_hdr_offset_valid >> > >> > IP4: 02:c6:e5:43:57:a5 -> 02:fc:ba:ad:30:33 >> > >> > TCP: 172.24.114.39 -> 48.0.0.67 >> > >> > tos 0x00, ttl 127, length 40, checksum 0x73fc >> > >> > fragment id 0x7951 >> > >> > TCP: 8447 -> 80 >> > >> > seq. 0x181a45db ack 0x181af226 >> > >> > flags 0x10 ACK, tcp header: 20 bytes >> > >> > window 32768, checksum 0x57cc >> > >> > 03:47:03:874685: wan-ens7-tx >> > >> > wan-ens7 tx queue 0 >> > >> > buffer 0x8b222: current data 0, length 54, buffer-pool 0, ref-count 1, >> > totlen-nifb 0, trace handle 0x31 >> > >> > ext-hdr-valid >> > >> > l4-cksum-computed l4-cksum-correct natted l2-hdr-offset 0 l3-hdr-offset 14 >> > >> > PKT MBUF: port 0, nb_segs 1, pkt_len 54 >> > >> > buf_len 2176, data_len 54, ol_flags 0x0, data_off 128, phys_addr 0x6fec8900 >> > >> > packet_type 0x110 l2_len 0 l3_len 0 outer_l2_len 0 outer_l3_len 0 >> > >> > rss 0x3aa73aa7 fdir.hi 0x0 fdir.lo 0x3aa73aa7 >> > >> > Packet Types >> > >> > RTE_PTYPE_L3_IPV4 (0x0010) IPv4 packet without extension headers >> > >> > RTE_PTYPE_L4_TCP (0x0100) TCP packet >> > >> > IP4: 02:c6:e5:43:57:a5 -> 02:fc:ba:ad:30:33 >> > >> > TCP: 172.24.114.39 -> 48.0.0.67 >> > >> > tos 0x00, ttl 127, length 40, checksum 0x73fc >> > >> > fragment id 0x7951 >> > >> > TCP: 8447 -> 80 >> > >> > seq. 0x181a45db ack 0x181af226 >> > >> > flags 0x10 ACK, tcp header: 20 bytes >> > >> > window 32768, checksum 0x57cc >> >
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