4 ms·
To my knowledge, from working on an actual software router, a router will only touch the TTL and recalculate the IP header checksum. There is no reason for it
by noncoml 6y ago
To my knowledge, from working on an actual software router, a router will only touch the TTL and recalculate the IP header checksum.
There is no reason for it to touch the TCP header.
- garmaine 6y agoAgreed there is no logical reason for it to touch the TCP header. And yet, an unfortunate number of L2 switches do exactly that. :(
- Thorrez 6y agoDoesn't NAT (specifically carrier-grade NAT in this case) often modify the port? Although I don't know if AT&T does carrier-grade NAT. https://en.wikipedia.org/wiki/Carrier-grade_NAT https://en.wikipedia.org/wiki/Carrier-grade_NAT
- noncoml 6y ago> an unfortunate number of L2 switches do exactly that Can you name any? Just curious