Re: What do you consider acceptable packet / session modification for a network operator?

Am 26.12.2025 um 17:47:14 Uhr schrieb Saku Ytti:

You're saying you've never seen an ISP adjust TCP MSS here? I must have misread, because I've never seen an ISP not adjust here.

If that fixes the problem, PMTU discovery (mandatory for IPv6 and IPv4 with DF bit) is broken and that means UDP, IPsec, GRE etc. all fail. The ISPs I used emit ICMP packet too big messages. -- Gruß Marco Send unsolicited bulk mail to 1766767634muell@cartoonies.org