# X_TRUSTED_PROXY_HOPS_INVALID

## Means

TRUSTED_PROXY_HOPS is not a whole number of proxies the boot accepts

## Typical cause

TRUSTED_PROXY_HOPS must be a whole number from 1 to @ultimat3/http's MAX_PROXY_HOPS (64): the count of proxies that append to x-forwarded-for in front of this process. A malformed count is refused rather than defaulted, because reading the header at the wrong index trusts a value the client typed. It was reported as X_PORT_INVALID ('is not a TCP port number') until 24.0.0

## Fix

`TRUSTED_PROXY_HOPS=1 ROLE=web bun apps/web/server.ts`

[CLI and verify](/error-codes#cli-and-verify)