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Explanation of Drop code and Module-ID Values in Packet Capture Output (SonicOS 5.8.1.15.71o)
03/26/2020 
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Description
When viewing output on the Investigate | Packet Monitor page, there are two fields that display potentially useful diagnostic information in numeric format under Packet detail:
- The Module-ID field provides information on the specific area of the firewall appliance's firmware that handled a particular packet.
- The Drop-Code field provides a reason why the appliance dropped a particular packet.
This article provides a list of the Module-ID and Drop-Code numbers along with their meanings.
The following Drop-Codes were extracted from SonicOS Enhanced 5.8.1.15.71o firmware version, however these codes may change when a new firmware is available.
Resolution
When viewing output on the System > Packet Capture page, there are two fields that display potentially useful diagnostic information in numeric format. The Module-ID field provides information on the specific area of the firewall (UTM) appliance's firmware that handled a particular packet. The Drop-Code field provides a reason why the appliance dropped a particular packet. This article provides a list of the Module-ID and Drop-Code numbers along with their meanings.
Please Note: The following Drop-Codes were extracted from SonicOS Enhanced 5.8.1.15-71o firmware version, however these codes may change when a new firmware is available. When unsure please contact SonicWall support.
Module ID and Module Name:
0 | 21 ipSec | 41 USERS |
Error code and Name
0 1 Unknown Ether type. 2 IPv6 packets not supported. 3 Packet on invalid vlan 4 Packet on invalid interface 5 Invalid HA packet 6 Invalid HA ARP packet 7 PPPoE discover packet not allowed 8 Invalid HA SDP packet 9 Routing packet not allowed 10 VLAN filtered. 11 L2B Learning-Bridge filtered 12 Invalid NET-ID found. 13 Invalid Run-time NET data. 14 Unknown ARP type. 15 Arp reply ignored. 16 IP address not for our subnet 17 NULL source IP address 18 Own gratuitous arp 19 IP address not on our lan subnet 20 Classical mode, ARP bridge not supported 21 ARP proxy, subnet mismatch 22 Not for me. 23 Invalid TCP Flag 24 Invalid TCP Options 25 IP sanity test failed 26 Non sonicpoint traffic in wlan zone 27 Multicast spank attack 28 Multicast Data packet dropped 29 Load Balancing Probe error 30 Syn Flood Protection 31 IP source route option found 32 Invalid connection cache. 33 Unknown destination 34 Bounce traffic detected 35 Access Rule Policy not found 36 AV detection 37 DEA detection 38 Bad TFTP packets 39 Enforced firewall rule 40 LICENSE drop 41 IDP detection 42 Packet to public IP from inside firewall 43 Bad TTL 44 IP check failed 45 Bad source IP 46 Bad destination MAC address 47 Broadcast not allowed on bridge. 48 Going to blacklisted server. 49 coming from blacklisted server. 50 Broadcast traffic not handled. 51 Multicast forwarding not configured 52 Multicast IGMP state not found 53 Multicast IP not in the allowed list 54 Anti-Spam Connection Limit Reached 55 Active/Active UTM drop offload packet 56 Unknown Ether type 57 Incorrect IP Version 58 Blacklisted MAC address 59 Wrong IP Length 60 Packet length mismatch with interface MTU 61 Wrong fragmentation boundary. 62 Wrong IP checksum value. 63 Wrong TCP Checksum value. 64 Wrong UDP Checksum value. 65 Wrong ICMP Checksum value. 66 NULL Udp port number 67 Non PPP-GRE traffic 68 Missing ESP Header 69 Missing AH Header 70 Missing IPCOMP Header 71 Unknown IP protocol type 72 TTL value is zero. 73 l2 mcast but dest ip is unicast 74 Null Source Zone. 75 Wrong UDP Length. 76 RECV: IP pkt recvd without IPCP session 77 RECV: TNMP can't alloc contiguous buf 78 XMIT: AHDLC encap no buf 79 XMIT: TNMP can't alloc contiguous buf 80 XMIT: Device not ready to forward traffic 81 XMIT: No IPCP session 82 XMIT: No Dialup Msg Buffer available 83 Non Zero GIAddr field in DHCP packet from client 84 Source MAC is different from chAddr field in DHCP client packet 85 Iphelper policy not found for DHCP relay. 86 Iphelper cache not found for DHCP. 87 Zero NSID in Netbios request packet. 88 Iphelper policy not found for Netbios. 89 Iphelper cache not found for Netbios. 90 Zero NSID in Netbios reply packet. 91 Ingress interface is same as egress interface. 92 DHCP server packet dropped, RPF check failed. 93 Netbios packet dropped, RPF check failed. 94 Other Application packet dropped, RPF check failed. 95 Iphelper policy not found for other Application. 96 Memory Allocation Error. 97 Length Mismatch. Cant forward pkt!!!. 98 Control message header size error. 99 Drop GRE packet as call not yet established. 100 Invalid GRE Flags or Caller ID. | 101 Invalid GRE sequence number. | 201 Sequence overflow while encryting packet 202 Encption error for out going packet 203 Combuf Ip Ptr NUll Error 204 Combuf Ip Length Error 205 Next Hop ARP not Resolved 206 Multicast buffer error 207 No IGMP entry found 208 No IGMP interface entry found 209 Combuf fields mismatch iplen-enet not equal to etherhdr size 210 IGMP wrong Checksum 211 Multicast not enabled 212 IGMP state table error 213 IGMP message error 214 IGMPV3 message error 215 IGMP version not supported 216 Multicast RTP stateful failed 217 IP Spoof check failed 218 OutGoing interface not available 219 Cache pointer is NULL. NAT policy lookup cannot be performed 220 NAT policy remap failed 221 NAT policy unique remap port failed 222 NAT policy lookup failed. Cache add aborted 223 Connection cache is full 224 Get VPN tunnel interface from policy failed 225 Packet from bounced path 226 Half open ESP connection 227 Half open IPCOMP connection 228 Allocate memory for connection cache failed 229 Packet marked to be dropped on ingress 230 Packet marked to be dropped on egress 231 Packet dropped by BWM CBQ as there is no default queue 232 Packet dropped by BWM CBQ as the queue is full 233 Packet dropped by BWM ACKQ as the queue is full 234 Packet dropped by BWM ACKQ as there is no default queue 235 Packet dropped due to BWM spin lock error 236 MAC-IP Anti-spoof check enforced for hosts. 237 MAC-IP Anti-spoof cache not found for this router. 238 MAC-IP Anti-spoof cache found, but it is not a router. 239 MAC-IP Anti-spoof cache found, but it is blacklisted device. 240 Packet dropped - IDP failure on sslspy packet 241 Packet droppedd - Content filter failure on sslspy packet 242 Packet dropped - failed processing 243 Packet dropped - failed SIP pre-processing 244 Packet dropped - failed SIP post-processing 245 Packet dropped - unknown SIP method 246 Packet dropped - unknown Call-ID in method 247 Packet dropped - invalid Contact: 248 Packet dropped - invalid Call-ID: 249 Packet dropped - invalid Via: 250 Packet dropped - invalid From: 251 Packet dropped - invalid To: 252 Packet dropped - invalid RecordRoute: 253 Packet dropped - invalid Maddr: 254 Packet dropped - invalid Route: 255 Packet dropped - invalid ACK 256 Packet dropped - invalid method 257 Packet dropped - invalid ReferredBy: 258 Packet dropped - invalid ReferredTo: 259 Packet dropped - invalid BYE 260 Packet dropped - invalid CANCEL 261 Packet dropped - invalid INVITE 262 Packet dropped - invalid REGISTER 263 Packet dropped - SDP body not found 264 Packet dropped - bad SDP content length 265 Packet dropped - bad SDP c= 266 Packet dropped - bad SDP m= 267 Packet dropped - failed SDP processing 268 Packet dropped - Geo-IP block for init country 269 Packet dropped - Geo-IP block for resp country 270 Packet dropped - BOTNET block for init command and control center 271 Packet dropped - BOTNET block for resp command and control center 272 - |
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