GRE tunnel issue

economist

New Member
Apr 2, 2018
9
0
1
37
hi,

I have issue with tunnelled IP ranges to Proxmox node. From some reason, when I tunnel /24 it does not reply back, seems something wrong with outgoing traffic from tunneled IP. It works perfectly fine when using directly(no tunnel). Any idea what it may be, tcpdump is provided below

x.x.x.1 > y.y.y.y.56791: Flags [S.], cksum 0x229c (incorrect -> 0x7457), seq 2054839180, ack 2580680250, win 28960, options [mss 1460,sackOK,TS val 238403935 ecr 1445544951,nop,wscale 7], length 0

x.x.x.x.31338 > y.y.y.y.56807: Flags [S.], cksum 0x229c (incorrect -> 0x7723), seq 3353372488, ack 1027053717, win 28960, options [mss 1460,sackOK,TS val 238403998 ecr 1445575161,nop,wscale 7], length 0
 

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