Additional research and support provided by Chad Seaman. Introduction Members of Akamai's Security Intelligence Response Team have been investigating a new DDoS vector that leverages a UDP Amplification technique known as WS-Discovery (WSD).
Jul 03, 2020 · flow_first_routing: call flow_route_lookup(): src_ip 1.1.1.100, x_dst_ip 192.168.222.50, in ifp fe-0/0/7.0, out ifp N/A sp 61232, dp 53, ip_proto 17, tos 0 Doing DESTINATION addr route-lookup routed (x_dst_ip 192.168.222.50) from untrust (fe-0/0/7.0 in 0) to ge-0/0/0.0, Next-hop: 192.168.224.1 policy search from zone untrust-> zone trust Documentation for socket() on Linux is split between various manpages including ip(7) that specifies that you have to use 0 or IPPROTO_UDP for UDP and 0 or IPPROTO_TCP for TCP. The port info is in the first fragmented packet as was mentioned elsewhere. My guess is someone fragmenting large packets ( the mtu is set to 1464 or so). and the host is receiving those fragment, but it not reconstructing the packets. Mar 18, 2019 · policy: type: ACL criteria:-name: block_tcp classifier: network_src_port_id: 640dfd77-c92b-45a3-b8fc-22712de480e1 destination_port_range: 80-1024 ip_proto: 6 ip_dst_prefix: 192.168.1.2/24-name: block_udp classifier: network_src_port_id: 640dfd77-c92b-45a3-b8fc-22712de480eda destination_port_range: 80-1024 ip_proto: 17 ip_dst_prefix: 192.168.2.2/24 If you want to filter out the IP fragments associated with the TCP, UDP or ICMP packets as well, then a better filter is: ip and !(ip.proto == 1 or ip.proto == 6 or ip.proto == 17). edit flag offensive delete link more Okay, I get all that. What I do not get is why I cannot specify the protocol in a normal webconfigurator firewall rule? Code: [Select] proto
Documentation for socket() on Linux is split between various manpages including ip(7) that specifies that you have to use 0 or IPPROTO_UDP for UDP and 0 or IPPROTO_TCP for TCP.
Hi, did you manage to figure this out? I've same symptoms on 3750 stack. Thanks, m.
On Friday 12 November 2004 20:13, Jordan Eunson wrote: > If you guys are ever in Vancouver I'll buy ya both a beer, just look me up. > > > BDS> Be sure /etc/ethertypes exists. > > /etc/protocols for this case. > > Both the /etc/protocols and /etc/ethertypes files are there and populated > > > [root@ etc]# grep udp /etc/protocols > > udp 17 UDP # user datagram protocol > > Here are some
IP 10.xx.xxx.xxx > 91.xx.xxx.xxx: ip-proto-17 IP 10.xx.xxx.xxx.443 > 91.xx.xxx.xxx.50349: UDP, bad length 1485 > 147 For me as a non Network super dupa Specialist i suggest that the udp packages to big? 1. Where can I modify that MTU size on NetScaler? 2. If the 1st one the solution - I mean sometimes it works? Any ideas? THX On Friday 12 November 2004 20:13, Jordan Eunson wrote: > If you guys are ever in Vancouver I'll buy ya both a beer, just look me up. > > > BDS> Be sure /etc/ethertypes exists. > > /etc/protocols for this case. > > Both the /etc/protocols and /etc/ethertypes files are there and populated > > > [root@ etc]# grep udp /etc/protocols > > udp 17 UDP # user datagram protocol > > Here are some Free 2-day shipping. Buy Stanley Proto JK3812S Duratek Slotted Square Bar Screwdriver, 3/8"x12" at Walmart.com Gateway Function for Network Slicing I-D.homma-rtgwg-slice-gateway-01 Shunsuke Homma –NTT Xavier De Foy –InterDigital Inc. Alex Galis –University College London The ESPRESSObin system uses an on-board ethernet switch chip, which is supported by Linux DSA (Distributed Switch Architecture). My understanding is that when you bridge 2 ethernet ports that are both connected to this switch chip, that all frames that are destined from one port to the other (and not to the SoC itself) will bypass the main SoC entirely and be handled by the switch chip. Unknown Wan Traffic Hi, After I updated my Fortigate 60D to 5.6.2, During the day for about 10 mins and every 30 mins and in mainly from 11.00 - 16.00 ( +2 Italy time ) the box make outbound traffic to apparently random ip's like bottom log.
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