Problem description:
Does internet router discard UDP packet which has IP option data?
I have two hosts which both have internet IPv4 address, and installed ubuntu 20.04.
If I send normal UDP packet which has no IP option data, host B will receive the UDP packet.
When I use sendip tool to send UDP packet with 4 bytes IP option data in IP header from host A to host B. Then host B can not receive the UDP packet.
More tests:
- When I send icmp/UDP packet which there is no IP option data from host A to host B. Then host B received icmp/UDP packet normally.
2)When I send UDP packet which has 4 byte IP option data from host A to host B. host B will not received the packet.
3) When I send UDP packetwhich has 4 byte IP option data from Windows PC to ubuntu PC. windows PC can receive the UDP packets. When send same packet from windows PC to ubuntu PC, then ubuntu PC will receive the UDP packet.
Does the internet router will discard UDP/TCP packet which has IP option data?
**command example: **
sendip -v -p ipv4 -is 156.254.126.xxx -id 111.229.170.xx -iosid 100 -p udp -us 3000 -ud 8000 -d 0xcafecafecafe 111.229.170.xx
tcpdump src 156.254.126.xxx -vvv
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